Commit Graph

2412 Commits

Author SHA1 Message Date
Jonhnathan 20d2e92cfe Review & Fix Invalid References (#1936) 2022-04-26 17:57:15 -03:00
Terrance DeJesus 5bf321a505 [Rule Tuning] Exclude MS OneDrive/Teams from Component Object Model Hijacking (#1932)
* adjusted query to exclude OneDrive process name and MS Teams DLL reference in registry data strings

* adjusted formatting for altered query

* removed unecessary string used for reference

* removed unecessary parenthesis from new filters in query

* Update rules/windows/persistence_suspicious_com_hijack_registry.toml

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>

* Update rules/windows/persistence_suspicious_com_hijack_registry.toml

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>

* added FileSyncConfig.exe for OneDrive, added regsvr32 to Teams DLL filter

* added investigation notes

* removed comment from original rule creation

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-04-26 11:43:33 -04:00
Jonhnathan 0943ffba5f [Rule Tuning] Remove logs-windows.* index (#1928)
* Remove `logs-windows.*` index

* Update discovery_privileged_localgroup_membership.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-04-14 09:25:44 -03:00
Jonhnathan 258418785f MInor changes from Investigation Guides Review (#1927) 2022-04-13 16:53:29 -08:00
Jonhnathan ebeb270075 [Security Content] Current Investigation Guides Review (#1896)
* Modify investigation guides

* Apply suggestions from code review

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>

* Update rules/windows/credential_access_symbolic_link_to_shadow_copy_created.toml

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>

* Rewrite and apply previous reviews

* Apply suggestions from code review

Co-authored-by: Joe Peeples <joe.peeples@elastic.co>

* Update rules/windows/credential_access_spn_attribute_modified.toml

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
2022-04-12 22:05:13 -03:00
Jonhnathan 46f5af436e [Security Content] Add Investigation Guides - 5 (#1895)
* [Security Content] Add Investigation Guides - 5

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-04-12 16:12:59 -08:00
Jonhnathan 3a5fceac3b [Security Content] Add Investigation Guides - 3 (#1836)
* [Security Content] Add Investigation Guides - 3
* Adjust Investigation Guides and Config
* Adjust Config

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
2022-04-12 15:58:50 -08:00
Jonhnathan 3b6c594a22 Update discovery_net_command_system_account.toml (#1912) 2022-04-11 15:03:49 -03:00
Isai 9640ecb3fe [Rule Tuning] AWS RDS Instance/Cluster Deletion (#1916)
* add RDS instance deletion to aws rule

I've added to this rule to improve coverage. Currently we detect creation and stopping of RDS clusters and instances. But, we only detect for the deletion of clusters, not instances. This adds the deletion of RDS instances to the detection.

* Update rules/integrations/aws/impact_rds_instance_cluster_deletion.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-04-10 15:33:33 -04:00
Jonhnathan 290763d9bb [Security Content] Add Investigation Guides - 4 (#1871)
* [Security Content] Add Investigation Guides - 4

* Apply suggestions from code review

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Update rules/windows/initial_access_script_executing_powershell.toml

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* lint

* Update persistence_user_account_creation.toml

* Apply suggestions from code review

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* .

* Fixes and lint

* .

* .

* revert modifications

* Apply suggestions from code review

Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

* Update impact_stop_process_service_threshold.toml

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
2022-04-10 15:37:06 -03:00
Isai 5073ef8be7 [Rule Tuning] AWS Security Group Configuration Change Detection (#1915)
* Update persistence_ec2_security_group_configuration_change_detection

Rule does not trigger as expected due to 'iam' provider. I changed the specified provider to 'ec2'.

* update to improve rule coverage

I edited this rule to include the deletion of an RDS Instance. This fills a current gap in coverage as we are able to detect the creation and stopping of RDS instances and clusters, but only detect deletion of RDS clusters.

* Revert "update to improve rule coverage"

This reverts commit b3b094274fe13c56908aa6781c8236de6e3b5380.
2022-04-07 14:47:09 -04:00
Jonhnathan 49074ddeaa [Rule Tuning] Add EQL optional field syntax (#1910)
* Add optional EQL syntax

* Add min_stack_version
2022-04-05 16:32:37 -03:00
Justin Ibarra 6bdfddac8e Expand timestamp override tests (#1907)
* Expand timestamp_override tests
* removed timestamp_override from eql sequence rules
* add config entry for eql rules with beats index and t_o
* add timestamp_override to missing fields
2022-04-01 15:27:08 -08:00
Terrance DeJesus 93edc44284 [Rule Tuning] Timeline Templates For Windows and Linux (#1892)
* added comprehensive file timeline to Hosts File Modified rule

* added Comprehensive Process Timeline to Interactive Terminal Spawned via Python rule

* updated rules to have generic instead of comprehensive

* updated several rules with timeline ID and timeline title values

* changed updated_date for threat intel fleet integrations

* added missing templates to timeline_templates dict in definitions.py

* added comprehensive timeline templates to alerts after definitions.py was updated

* updated rules with comprehensive timeline templates and added min stack comments and versions

* removing timeline template changes which is tracked in #1904

* Update rules/linux/execution_python_tty_shell.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Delete Pipfile

Removing pipfile

* Delete Pipfile.lock

deleting pipfile.lock

* Update rules/windows/execution_command_shell_started_by_svchost.toml

updating title

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-04-01 13:44:35 -04:00
Jonhnathan e1b4a0d87c Svchost spawning Cmd - False Positives Tuning (#1894) 2022-03-31 19:28:46 -03:00
Jonhnathan 8a59b49fea [Security Content] Adjust Investigation Guides to be less generic (#1805)
* PowerShell Suspicious Script with Audio Capture Capabilities

* PowerShell Keylogging Script

* PowerShell MiniDump Script

* Potential Process Injection via PowerShell

* PowerShell Suspicious Discovery Related Windows API Functions

* Suspicious Portable Executable Encoded in Powershell Script

* PowerShell PSReflect Script

* Startup/Logon Script added to Group Policy Object

* Group Policy Abuse for Privilege Addition

* Scheduled Task Execution at Scale via GPO

* Apply suggestions from code review

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>

* Adjust Posh desc

* .

* Apply suggestions from code review

Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>

* .

* Apply suggestions from code review

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

* Update privilege_escalation_group_policy_scheduled_task.toml

* Update rules/windows/privilege_escalation_group_policy_iniscript.toml

Co-authored-by: Joe Peeples <joe.peeples@elastic.co>

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
2022-03-31 11:29:30 -03:00
Jonhnathan a3d7427d29 [Security Content] Add Investigation Guides - 2 (#1822)
* Add Investigation Guides for Windows Rules - First half

* + 1/2

* Update impact_volume_shadow_copy_deletion_or_resized_via_vssadmin.toml

* Update credential_access_mod_wdigest_security_provider.toml

* Apply suggestions from code review

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

* Update defense_evasion_amsienable_key_mod.toml

* Update defense_evasion_amsienable_key_mod.toml

* Apply suggestions from code review

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>

* Update command_and_control_certutil_network_connection.toml

* Apply suggestions from code review

Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>

* Update collection_winrar_encryption.toml

* Apply suggestions from code review

Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
2022-03-30 14:43:55 -03:00
Justin Ibarra 8d09bca633 Re-add c89 rules (#1900) 2022-03-29 15:01:48 -08:00
Justin Ibarra 507a23ba01 temp remove rule to readd with backport (#1898) 2022-03-29 14:52:04 -08:00
Colson Wilhoit bcec8a4479 Linux Shell Evasion Rule Tuning (#1878)
* Linux Shell Evasion Rule Tuning

* Update execution_python_tty_shell.toml

* Update rules/linux/execution_apt_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_apt_binary.toml

* Update rules/linux/execution_awk_binary_shell.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_awk_binary_shell.toml

* Update rules/linux/execution_c89_c99_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_c89_c99_binary.toml

* Update rules/linux/execution_cpulimit_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_cpulimit_binary.toml

* Update rules/linux/execution_expect_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_expect_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_expect_binary.toml

* Update rules/linux/execution_find_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_find_binary.toml

* Update rules/linux/execution_gcc_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_gcc_binary.toml

* Update rules/linux/execution_mysql_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_mysql_binary.toml

* Update rules/linux/execution_nice_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_nice_binary.toml

* Update rules/linux/execution_ssh_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_ssh_binary.toml

* Update execution_perl_tty_shell.toml

* Update execution_python_tty_shell.toml

* Update rules/linux/execution_apt_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_awk_binary_shell.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_c89_c99_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_cpulimit_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_expect_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_find_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_gcc_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_mysql_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_nice_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_ssh_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-03-29 09:16:21 -05:00
shashank-elastic fb40a4a8c7 Description updation across multiple rules (#1893)
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-28 22:54:37 +05:30
Damià Poquet Femenia 9ad3d39a32 Add Jamf Connect exception for macOS users enumeration rule (#1891)
* Update discovery_users_domain_built_in_commands.toml

Jamf Connect uses ldapsearch to synchronize user passwords.

* change rule update date
2022-03-28 13:13:28 -03:00
Stijn Holzhauer 3d4eaf4caf Adding path as stated in #1812 (#1889)
* Adding path as stated in #1812

* Bumping updated_date

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-03-27 08:07:38 -03:00
Jonhnathan 940689576d [New Rule] Account configured with never Expiring Password (#1790)
* Create persistence_nopasswd_account.toml

* Update persistence_nopasswd_account.toml

* Update persistence_nopasswd_account.toml

* .

* Update persistence_dontexpirepasswd_account.toml

* Update persistence_dontexpirepasswd_account.toml
2022-03-26 08:19:28 -03:00
Jonhnathan cdb3dd6dbe [Security Content] Add Investigation Guides (#1799)
* Update impact_backup_file_deletion.toml

* Update credential_access_seenabledelegationprivilege_assigned_to_user.toml

* Update defense_evasion_ms_office_suspicious_regmod.toml

* Update credential_access_posh_request_ticket.toml

* Update credential_access_disable_kerberos_preauth.toml

* Fix missing hyphen

* Update rules/windows/credential_access_posh_request_ticket.toml

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Update rules/windows/credential_access_posh_request_ticket.toml

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

* Update credential_access_posh_request_ticket.toml

* Apply suggestions from code review

Co-authored-by: Joe Peeples <joe.peeples@elastic.co>

* Remove extra line

* Apply suggestions from code review

Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>

* Lint and adjusts

* Apply suggestions from code review

Co-authored-by: Joe Peeples <joe.peeples@elastic.co>

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: benironside <91905639+benironside@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
Co-authored-by: Joe Peeples <joe.peeples@elastic.co>
Co-authored-by: nastasha-solomon <79124755+nastasha-solomon@users.noreply.github.com>
2022-03-24 18:16:00 -03:00
shashank-elastic 3474f8c8e4 flock shell evasion threat (#1863)
* flock shell evasion threat

* Update rules/linux/execution_flock_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_flock_binary.toml

* Update rules/linux/execution_flock_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-24 15:52:18 -05:00
shashank-elastic 152477904f vim shell evasion threat (#1865)
* vim shell evasion threat

* Update rules/linux/execution_vi_binary.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/linux/execution_vi_binary.toml

* Update rules/linux/execution_vi_binary.toml

* Update rules/linux/execution_vi_binary.toml

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
2022-03-24 15:37:20 -05:00
Jonhnathan df7bed4408 [New Rule] User account exposed to Kerberoasting (#1789)
* Create credential_access_spn_attribute_modified.toml

* Update credential_access_spn_attribute_modified.toml

* Update non-ecs-schema.json

* Update rules/windows/credential_access_spn_attribute_modified.toml

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
2022-03-23 16:31:47 -03:00
Samirbous c254d0de8b [New Rule] Suspicious Remote Registry Access via SeBackupPrivilege (#1783)
* [New Rule] Suspicious Remote Registry Access via SeBackupPrivilege

https://github.com/mpgn/BackupOperatorToDA
https://raw.githubusercontent.com/Wh04m1001/Random/main/BackupOperators.cpp

Detection mainly occurs on AD/DC side :
EQL

```
sequence by host.id, winlog.event_data.SubjectLogonId with maxspan=1m
 [iam where event.action == "logged-in-special"  and
  winlog.event_data.PrivilegeList : "SeBackupPrivilege"]
 [any where event.action == "Detailed File Share" and winlog.event_data.RelativeTargetName : "winreg"]
```

```
  "sequences" : [
      {
        "join_keys" : [
          "83989f29-8447-4b3c-a54b-4a0f7e5a4872",
          "0x2a23a5"
        ],
        "events" : [
          {
            "_index" : ".ds-logs-system.security-default-2022.02.11-000001",
            "_id" : "L68HAn8BQQK22TUvoE_k",
            "_source" : {
              "agent" : {
                "name" : "01566s-win16-ir",
                "id" : "0517bf72-e8ae-4f53-bc09-cdf3428aa683",
                "type" : "filebeat",
                "ephemeral_id" : "26383f4e-4412-4aa4-8ed4-7e729fb593e8",
                "version" : "8.0.0"
              },
              "winlog" : {
                "computer_name" : "01566s-win16-ir.threebeesco.com",
                "process" : {
                  "pid" : 624,
                  "thread" : {
                    "id" : 756
                  }
                },
                "keywords" : [
                  "Audit Success"
                ],
                "logon" : {
                  "id" : "0x2a23a5"
                },
                "channel" : "Security",
                "event_data" : {
                  "SubjectUserName" : "samir",
                  "SubjectDomainName" : "3B",
                  "SubjectLogonId" : "0x2a23a5",
                  "PrivilegeList" : [
                    "SeBackupPrivilege",
                    "SeRestorePrivilege"
                  ],
                  "SubjectUserSid" : "S-1-5-21-308926384-506822093-3341789130-220106"
                },
                "opcode" : "Info",
                "record_id" : "2987813",
                "task" : "Special Logon",
                "event_id" : "4672",
                "provider_guid" : "{54849625-5478-4994-A5BA-3E3B0328C30D}",
                "api" : "wineventlog",
                "provider_name" : "Microsoft-Windows-Security-Auditing"
              },
              "log" : {
                "level" : "information"
              },
              "elastic_agent" : {
                "id" : "0517bf72-e8ae-4f53-bc09-cdf3428aa683",
                "version" : "8.0.0",
                "snapshot" : false
              },
              "message" : """Special privileges assigned to new logon.

Subject:
	Security ID:		S-1-5-21-308926384-506822093-3341789130-220106
	Account Name:		samir
	Account Domain:		3B
	Logon ID:		0x2A23A5

Privileges:		SeBackupPrivilege
			SeRestorePrivilege""",
              "input" : {
                "type" : "winlog"
              },
              "@timestamp" : "2022-02-16T10:15:26.330Z",
              "ecs" : {
                "version" : "1.12.0"
              },
              "related" : {
                "user" : [
                  "samir"
                ]
              },
              "data_stream" : {
                "namespace" : "default",
                "type" : "logs",
                "dataset" : "system.security"
              },
              "host" : {
                "hostname" : "01566s-win16-ir",
                "os" : {
                  "build" : "14393.3659",
                  "kernel" : "10.0.14393.3659 (rs1_release_1.200410-1813)",
                  "name" : "Windows Server 2016 Datacenter",
                  "type" : "windows",
                  "family" : "windows",
                  "version" : "10.0",
                  "platform" : "windows"
                },
                "ip" : [
                  "172.16.66.36",
                  "fe80::ffff:ffff:fffe",
                  "fe80::5efe:ac10:4224"
                ],
                "name" : "01566s-win16-ir.threebeesco.com",
                "id" : "83989f29-8447-4b3c-a54b-4a0f7e5a4872",
                "mac" : [
                  "00:50:56:24:6c:d2",
                  "00:00:00:00:00:00:00:e0",
                  "00:00:00:00:00:00:00:e0"
                ],
                "architecture" : "x86_64"
              },
              "event" : {
                "agent_id_status" : "verified",
                "ingested" : "2022-02-16T10:15:28Z",
                "code" : "4672",
                "provider" : "Microsoft-Windows-Security-Auditing",
                "created" : "2022-02-16T10:15:27.675Z",
                "kind" : "event",
                "action" : "logged-in-special",
                "category" : [
                  "iam"
                ],
                "type" : [
                  "admin"
                ],
                "dataset" : "system.security",
                "outcome" : "success"
              },
              "user" : {
                "domain" : "3B",
                "name" : "samir",
                "id" : "S-1-5-21-308926384-506822093-3341789130-220106"
              }
            }
          },
          {
            "_index" : ".ds-logs-system.security-default-2022.02.11-000001",
            "_id" : "Mq8HAn8BQQK22TUvoE_k",
            "_source" : {
              "agent" : {
                "name" : "01566s-win16-ir",
                "id" : "0517bf72-e8ae-4f53-bc09-cdf3428aa683",
                "ephemeral_id" : "26383f4e-4412-4aa4-8ed4-7e729fb593e8",
                "type" : "filebeat",
                "version" : "8.0.0"
              },
              "winlog" : {
                "computer_name" : "01566s-win16-ir.threebeesco.com",
                "process" : {
                  "pid" : 4,
                  "thread" : {
                    "id" : 1176
                  }
                },
                "keywords" : [
                  "Audit Success"
                ],
                "logon" : {
                  "id" : "0x2a23a5"
                },
                "channel" : "Security",
                "event_data" : {
                  "ShareName" : """\\*\IPC$""",
                  "IpPort" : "50071",
                  "SubjectLogonId" : "0x2a23a5",
                  "AccessMask" : "0x12019f",
                  "ObjectType" : "File",
                  "SubjectUserName" : "samir",
                  "AccessReason" : "-",
                  "SubjectDomainName" : "3B",
                  "IpAddress" : "172.16.66.25",
                  "AccessMaskDescription" : [
                    "List Object",
                    "Read Property",
                    "Create Child",
                    "Control Access",
                    "Delete Child",
                    "List Contents",
                    "SELF",
                    "SYNCHRONIZE",
                    "READ_CONTROL"
                  ],
                  "RelativeTargetName" : "winreg",
                  "AccessList" : """%%1538
				%%1541
				%%4416
				%%4417
				%%4418
				%%4419
				%%4420
				%%4423
				%%4424
				""",
                  "SubjectUserSid" : "S-1-5-21-308926384-506822093-3341789130-220106"
                },
                "opcode" : "Info",
                "record_id" : "2987816",
                "event_id" : "5145",
                "task" : "Detailed File Share",
                "provider_guid" : "{54849625-5478-4994-A5BA-3E3B0328C30D}",
                "api" : "wineventlog",
                "provider_name" : "Microsoft-Windows-Security-Auditing"
              },
              "log" : {
                "level" : "information"
              },
              "elastic_agent" : {
                "id" : "0517bf72-e8ae-4f53-bc09-cdf3428aa683",
                "version" : "8.0.0",
                "snapshot" : false
              },
              "message" : """A network share object was checked to see whether client can be granted desired access.

Subject:
	Security ID:		S-1-5-21-308926384-506822093-3341789130-220106
	Account Name:		samir
	Account Domain:		3B
	Logon ID:		0x2A23A5

Network Information:
	Object Type:		File
	Source Address:		172.16.66.25
	Source Port:		50071

Share Information:
	Share Name:		\\*\IPC$
	Share Path:
	Relative Target Name:	winreg

Access Request Information:
	Access Mask:		0x12019F
	Accesses:		READ_CONTROL
				SYNCHRONIZE
				ReadData (or ListDirectory)
				WriteData (or AddFile)
				AppendData (or AddSubdirectory or CreatePipeInstance)
				ReadEA
				WriteEA
				ReadAttributes
				WriteAttributes

Access Check Results:
	-""",
              "input" : {
                "type" : "winlog"
              },
              "@timestamp" : "2022-02-16T10:15:26.336Z",
              "ecs" : {
                "version" : "1.12.0"
              },
              "data_stream" : {
                "namespace" : "default",
                "type" : "logs",
                "dataset" : "system.security"
              },
              "host" : {
                "hostname" : "01566s-win16-ir",
                "os" : {
                  "build" : "14393.3659",
                  "kernel" : "10.0.14393.3659 (rs1_release_1.200410-1813)",
                  "name" : "Windows Server 2016 Datacenter",
                  "family" : "windows",
                  "type" : "windows",
                  "version" : "10.0",
                  "platform" : "windows"
                },
                "ip" : [
                  "172.16.66.36",
                  "fe80::ffff:ffff:fffe",
                  "fe80::5efe:ac10:4224"
                ],
                "name" : "01566s-win16-ir.threebeesco.com",
                "id" : "83989f29-8447-4b3c-a54b-4a0f7e5a4872",
                "mac" : [
                  "00:50:56:24:6c:d2",
                  "00:00:00:00:00:00:00:e0",
                  "00:00:00:00:00:00:00:e0"
                ],
                "architecture" : "x86_64"
              },
              "event" : {
                "agent_id_status" : "verified",
                "ingested" : "2022-02-16T10:15:28Z",
                "code" : "5145",
                "provider" : "Microsoft-Windows-Security-Auditing",
                "kind" : "event",
                "created" : "2022-02-16T10:15:27.675Z",
                "action" : "Detailed File Share",
                "dataset" : "system.security",
                "outcome" : "success"
              }
            }
          }
        ]
      },
```

* Update non-ecs-schema.json

* Update rules/windows/credential_access_suspicious_winreg_access_via_sebackup_priv.toml

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2022-03-23 19:42:03 +01:00
Justin Ibarra 46c2383e5b [New Rule] Okta User Session Impersonation (#1867)
* [New Rule] Okta User Session Impersonation
Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2022-03-22 16:11:29 -08:00
Stijn Holzhauer 2ed97d2e8c [Rule Tuning] Adding event.provider to AWS WAF Rule or Rule Group Deletion (#1833)
* Adding event.provider

* Removing new line

* Updating updated_date field

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2022-03-22 20:36:53 -03:00
shashank-elastic 22367d3702 crash shell evasion threat (#1861) 2022-03-22 18:46:05 +05:30
shashank-elastic 2ab5a1f44a [New Rule] cpulimit shell evasion threat (#1851)
* cpulimit shell evasion threat

* Update rules/linux/execution_cpulimit_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* Update rules/linux/execution_cpulimit_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-03-21 12:16:53 -05:00
Terrance DeJesus 096723b2a1 [Rule Tuning] Symbolic Link to Shadow Copy Created (#1830)
* fixed duplicated file name

* deprecated Symbolic Link to Shadow Copy Created as it may be prone to FP and the intrusion steps are covered with NTDS or SAM Database File Copied

* moved rule back to production, added investigation notes and sequencing to EQL query

* added related rule 3bc6deaa-fbd4-433a-ae21-3e892f95624f to investigation notes

* updating with minor changes

* adjusted related rules

* adjusted investigation notes

* Update rules/windows/credential_access_symbolic_link_to_shadow_copy_created.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/credential_access_symbolic_link_to_shadow_copy_created.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/credential_access_symbolic_link_to_shadow_copy_created.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* TOML linted and adjusted updated date

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
2022-03-18 11:08:29 -04:00
shashank-elastic 7feebc2c10 Updation of Mitre Tactic and Threats (#1850)
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-18 15:06:24 +05:30
Jonhnathan 22dd7f0ada Deprecate PrintNightmare Rules (#1852) 2022-03-17 19:39:36 -03:00
Jonhnathan a6edb7cfcf Update defense_evasion_posh_process_injection.toml (#1838)
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-17 19:37:42 -03:00
shashank-elastic b492258fb0 [New Rule] busybox shell evasion threat (#1842)
* busybox shell evasion threat

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-17 09:54:46 +05:30
shashank-elastic f7735df1d5 [New Rule] c89/c99 shell evasion threat (#1840)
* c88/c99 shell evasion threat
2022-03-16 23:06:34 +05:30
Jonhnathan e0f8f61ca0 Update persistence_user_account_added_to_privileged_group_ad.toml (#1845) 2022-03-16 13:06:04 -03:00
Jonhnathan b5f06f455c Update defense_evasion_microsoft_defender_tampering.toml (#1837) 2022-03-14 20:07:39 -03:00
Jonhnathan 53fbc50ea1 [New Rule] AdminSDHolder SDProp Exclusion Added (#1795)
* AdminSDHolder SDProp Exclusion Added Initial Rule

* Update persistence_sdprop_exclusion_dsheuristics.toml

* Update rules/windows/persistence_sdprop_exclusion_dsheuristics.toml

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
2022-03-10 14:17:01 -03:00
shashank-elastic c05f3c8aa3 gcc shell evasion threat (#1824) 2022-03-10 22:41:31 +05:30
shashank-elastic b49cce9fcb ssh shell evasion threat (#1827) 2022-03-10 22:39:05 +05:30
shashank-elastic ddbc1de45c mysql shell evasion threat (#1823) 2022-03-10 22:36:35 +05:30
shashank-elastic 334aa12aaf expect shell evasion threat (#1817)
* expect shell evasion threat

* expect shell evasion threat

* Update rules/linux/defense_evasion_expect_binary.toml

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-07 14:22:56 -06:00
shashank-elastic 2b6a357a4b nice shell evasion threat (#1820)
* nice shell evasion threat

* Update rules/linux/defense_evasion_nice_binary.toml

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-07 13:59:16 -06:00
shashank-elastic f9503f2096 [Rule Tuning] Rule description updates (#1811)
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
2022-03-07 19:33:11 +05:30
shashank-elastic 2a82f18e43 [New Rule] Linux Restricted Shell Breakout via the Vi command (#1809)
* new:rule:issue-1808 vi shell evasion threat

* Update rules/linux/defense_evasion_vi_binary.toml

* Update rules/linux/defense_evasion_vi_binary.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

* new:rule:issue-1808 vi shell evasion threat

* new:rule:issue-1808 vi shell evasion threat

* new:rule:issue-1808 vi shell evasion threat

* Update rules/linux/defense_evasion_vi_binary.toml

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-03-04 13:46:19 -06:00
Samirbous a6582351b5 [New Rule] Potential Remote Credential Access via Registry (#1804)
* [New Rule] Potential Remote Credential Access via Registry

4624 logon followed by hive file creation by regsvc svchost.exe by same user.name and host.id. This matches on secretdsdump and other similar implementations. require to correlation Elastic endpoint file events with System integration logs (4624).

Example of data :

* Delete workspace.xml

* Update credential_access_remote_sam_secretsdump.toml

* Update credential_access_remote_sam_secretsdump.toml

* add non ecs field

* Update non-ecs-schema.json

* Update credential_access_remote_sam_secretsdump.toml

* Update rules/windows/credential_access_remote_sam_secretsdump.toml

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>

* Update rules/windows/credential_access_remote_sam_secretsdump.toml

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>

* Update rules/windows/credential_access_remote_sam_secretsdump.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2022-03-03 16:28:03 +01:00