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[New Rules] [BBR] Windows Deprecated ERs Conversion - 3 (#3143)

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* [New Rules] [BBR] Windows Deprecated ERs Conversion - 3

* Update defense_evasion_invalid_codesign_imageload.toml

* Update defense_evasion_invalid_codesign_imageload.toml

* Update rules_building_block/initial_access_execution_remote_via_msiexec.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update rules_building_block/initial_access_xsl_script_execution_via_com.toml

Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>

* Update rules_building_block/initial_access_execution_remote_via_msiexec.toml

Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>

---------

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
This commit is contained in:
Jonhnathan
2023-10-17 14:16:28 -03:00
committed by GitHub
parent 3ea3e5a9fd
commit 74222f86eb
4 changed files with 272 additions and 0 deletions
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rules_building_block/defense_evasion_invalid_codesign_imageload.toml
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[metadata]
creation_date = "2023/09/27"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/27"
[rule]
author = ["Elastic"]
description = """
Identifies binaries that are loaded and with an invalid code signature. This may indicate an attempt to masquerade as a
signed binary.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Image Loaded with Invalid Signature"
risk_score = 21
rule_id = "fd9484f2-1c56-44ae-8b28-dc1354e3a0e8"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"
query = '''
library where host.os.type == "windows" and event.action == "load" and
dll.code_signature.status : ("errorUntrustedRoot", "errorBadDigest", "errorUntrustedRoot") and
(dll.Ext.relative_file_creation_time <= 500 or dll.Ext.relative_file_name_modify_time <= 500) and
not startswith~(dll.name, process.name) and
not dll.path : (
"?:\\Windows\\System32\\DriverStore\\FileRepository\\*"
)
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"
[[rule.threat.technique.subtechnique]]
id = "T1036.001"
name = "Invalid Code Signature"
reference = "https://attack.mitre.org/techniques/T1036/001/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
rules_building_block/initial_access_execution_from_removable_media.toml
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[metadata]
creation_date = "2023/09/27"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/27"
bypass_bbr_timing = true
[rule]
author = ["Elastic"]
description = """
Identifies process execution from a removable media and by an unusual process. Adversaries may move onto systems,
possibly those on disconnected or air-gapped networks, by copying malware to removable media and taking advantage of
Autorun features when the media is inserted into a system and executes.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Execution from a Removable Media with Network Connection"
risk_score = 21
rule_id = "1542fa53-955e-4330-8e4d-b2d812adeb5f"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Rule Type: BBR", "Data Source: Elastic Defend"]
building_block_type = "default"
type = "eql"
query = '''
sequence by process.entity_id with maxspan=5m
[process where host.os.type == "windows" and event.action == "start" and
/* Direct Exec from USB */
(process.Ext.device.bus_type : "usb" or process.Ext.device.product_id : "USB *") and
(process.code_signature.trusted == false or process.code_signature.exists == false) and
not process.code_signature.status : ("errorExpired", "errorCode_endpoint*")]
[network where host.os.type == "windows" and event.action == "connection_attempted"]
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1091"
name = "Replication Through Removable Media"
reference = "https://attack.mitre.org/techniques/T1091/"
[rule.threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
rules_building_block/initial_access_execution_remote_via_msiexec.toml
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[metadata]
creation_date = "2023/09/28"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/28"
bypass_bbr_timing = true
[rule]
author = ["Elastic"]
description = """
Identifies the execution of the built-in Windows Installer, msiexec.exe, to install a remote package. Adversaries may abuse
msiexec.exe to launch local or network accessible MSI files.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Remote File Execution via MSIEXEC"
risk_score = 21
rule_id = "3e441bdb-596c-44fd-8628-2cfdf4516ada"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
building_block_type = "default"
type = "eql"
query = '''
sequence with maxspan=1m
[process where host.os.type == "windows" and event.action == "start" and
process.name : "msiexec.exe" and process.args : "/V"] by process.entity_id
[network where host.os.type == "windows" and process.name : "msiexec.exe" and
event.action == "connection_attempted"] by process.entity_id
[process where host.os.type == "windows" and event.action == "start" and
process.parent.name : "msiexec.exe" and user.id : ("S-1-5-21-*", "S-1-5-12-1-*") and
not process.executable : ("?:\\Windows\\SysWOW64\\msiexec.exe",
"?:\\Windows\\System32\\msiexec.exe",
"?:\\Windows\\System32\\srtasks.exe",
"?:\\Windows\\SysWOW64\\srtasks.exe",
"?:\\Windows\\System32\\taskkill.exe",
"?:\\Windows\\Installer\\MSI*.tmp",
"?:\\Program Files\\*.exe",
"?:\\Program Files (x86)\\*.exe",
"?:\\Windows\\System32\\ie4uinit.exe",
"?:\\Windows\\SysWOW64\\ie4uinit.exe",
"?:\\Windows\\System32\\sc.exe",
"?:\\Windows\\system32\\Wbem\\mofcomp.exe",
"?:\\Windows\\twain_32\\fjscan32\\SOP\\crtdmprc.exe",
"?:\\Windows\\SysWOW64\\taskkill.exe",
"?:\\Windows\\SysWOW64\\schtasks.exe",
"?:\\Windows\\system32\\schtasks.exe",
"?:\\Windows\\System32\\sdbinst.exe") and
not (process.code_signature.subject_name == "Citrix Systems, Inc." and process.code_signature.trusted == true) and
not (process.name : ("regsvr32.exe", "powershell.exe", "rundll32.exe", "wscript.exe") and
process.Ext.token.integrity_level_name == "high" and
process.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*")) and
not (process.executable : ("?:\\Program Files\\*.exe", "?:\\Program Files (x86)\\*.exe") and process.code_signature.trusted == true) and
not (process.name : "rundll32.exe" and process.args : "printui.dll,PrintUIEntry")
] by process.parent.entity_id
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1566"
name = "Phishing"
reference = "https://attack.mitre.org/techniques/T1566/"
[[rule.threat.technique.subtechnique]]
id = "T1566.002"
name = "Spearphishing Link"
reference = "https://attack.mitre.org/techniques/T1566/002/"
[rule.threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"
[[rule.threat.technique.subtechnique]]
id = "T1218.007"
name = "Msiexec"
reference = "https://attack.mitre.org/techniques/T1218/007/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
rules_building_block/initial_access_xsl_script_execution_via_com.toml
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[metadata]
creation_date = "2023/09/27"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/27"
bypass_bbr_timing = true
[rule]
author = ["Elastic"]
description = """
Identifies the execution of a hosted XSL script using the Microsoft.XMLDOM COM interface via Microsoft Office processes.
This behavior may indicate adversarial activity to execute malicious JScript or VBScript on the system.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Remote XSL Script Execution via COM"
risk_score = 21
rule_id = "48f657ee-de4f-477c-aa99-ed88ee7af97a"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Tactic: Defense Evasion", "Rule Type: BBR", "Data Source: Elastic Defend"]
building_block_type = "default"
type = "eql"
query = '''
sequence with maxspan=1m
[library where host.os.type == "windows" and dll.name : "msxml3.dll" and
process.name : ("winword.exe", "excel.exe", "powerpnt.exe", "mspub.exe")] by process.entity_id
[process where host.os.type == "windows" and event.action == "start" and
process.parent.name : ("winword.exe", "excel.exe", "powerpnt.exe", "mspub.exe") and
not process.executable :
("?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWoW64\\WerFault.exe",
"?:\\windows\\splwow64.exe",
"?:\\Windows\\System32\\conhost.exe",
"?:\\Program Files\\*.exe",
"?:\\Program Files (x86)\\*exe")] by process.parent.entity_id
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1566"
name = "Phishing"
reference = "https://attack.mitre.org/techniques/T1566/"
[[rule.threat.technique.subtechnique]]
id = "T1566.002"
name = "Spearphishing Link"
reference = "https://attack.mitre.org/techniques/T1566/002/"
[rule.threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1220"
name = "XSL Script Processing"
reference = "https://attack.mitre.org/techniques/T1220/"
[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"