Merge PR #4681 from @nasbench - Add Missing Ref & Tags
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fix: Kerberos Manipulation - Update field to use Status instead of incorrect "FailureCode"
fix: Metasploit SMB Authentication - Remove unnecessary field
fix: Service Installation in Suspicious Folder - Update FP filter
update: Malicious PowerShell Commandlets - ProcessCreation - "Start-Dnscat2"
remove: Dnscat Execution - Deprecated in favour of an integration in the "Malicious PowerShell Cmdlet" type of rules
remove: SAM Dump to AppData
update: Critical Hive In Suspicious Location Access Bits Cleared - Enhance metadata and logic
update: Malicious PowerShell Commandlets - PoshModule - "Start-Dnscat2"
update: Malicious PowerShell Commandlets - ScriptBlock - "Start-Dnscat2"
update: Malicious PowerShell Scripts - FileCreation - Add "dnscat2.ps1"
update: Malicious PowerShell Scripts - PoshModule - Add "dnscat2.ps1"
update: Monitoring For Persistence Via BITS - Use "Image" and "OriginalFileName" fields instead of CLI only
update: New or Renamed User Account with '$' Character - Reduced level to "medium"
update: New Process Created Via Taskmgr.EXE - Added full paths to the filtered binaries to decrease false negatives
update: Potential Dropper Script Execution Via WScript/CScript - Re-wrote the logic by removing the paths "C:\Users" and "C:\ProgramData". As these are very common and will generate high FP rate. Instead switched the paths to a more robust list and extended the list of extension covered. Also reduced the level to "medium"
update: Potential Fake Instance Of Hxtsr.EXE Executed - Remove "C:" prefix from detection logic
update: Prefetch File Deleted - Update selection to remove 'C:' prefix
update: Sensitive File Access Via Volume Shadow Copy Backup - Made the rule more generic by updating the title and removing the IOC from conti. (will be added in a dedicated rule)
update: Shell Process Spawned by Java.EXE - Add "bash.exe"
update: Suspicious PowerShell Download - Powershell Script - Add "DownloadFileAsync" and "DownloadStringAsync" functions
update: Suspicious Processes Spawned by Java.EXE - Remove "bash.exe" as its doesn't fit the logic
update: Sysmon Application Crashed - Add 32bit version of sysmon binary
update: Tap Driver Installation - Security - Reduce level to "low"
update: Write Protect For Storage Disabled - Remove "storagedevicepolicies" as the string "storage" already covers it

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Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
This commit is contained in:
Nasreddine Bencherchali
2024-01-29 13:37:20 +01:00
committed by GitHub
parent 7f582c3d16
commit be359ef3f2
114 changed files with 482 additions and 342 deletions
-2
View File
@@ -26,8 +26,6 @@ bef0bc5a-b9ae-425d-85c6-7b2d705980c6;Python Initiated Connection;151\.101\.64\.2
c187c075-bb3e-4c62-b4fa-beae0ffc211f;Deteled Rule in Windows Firewall with Advanced Security;Dropbox.*\\netsh\.exe
69aeb277-f15f-4d2d-b32a-55e883609563;Disabling Windows Event Auditing;Computer: .*
ac175779-025a-4f12-98b0-acdaeb77ea85;PowerShell Script Run in AppData;\\Evernote-
cfeed607-6aa4-4bbd-9627-b637deb723c8;New or Renamed User Account with '$' in Attribute 'SamAccountName';HomeGroupUser\$
7b449a5e-1db5-4dd0-a2dc-4e3a67282538;Hidden Local User Creation;HomeGroupUser\$
1f2b5353-573f-4880-8e33-7d04dcf97744;Sysmon Configuration Modification;Computer: evtx-PC
734f8d9b-42b8-41b2-bcf5-abaf49d5a3c8;Remote PowerShell Session Host Process (WinRM);WIN-FPV0DSIC9O6
734f8d9b-42b8-41b2-bcf5-abaf49d5a3c8;Remote PowerShell Session Host Process (WinRM);Computer: Agamemnon
1 RuleId RuleName MatchString
26 c187c075-bb3e-4c62-b4fa-beae0ffc211f Deteled Rule in Windows Firewall with Advanced Security Dropbox.*\\netsh\.exe
27 69aeb277-f15f-4d2d-b32a-55e883609563 Disabling Windows Event Auditing Computer: .*
28 ac175779-025a-4f12-98b0-acdaeb77ea85 PowerShell Script Run in AppData \\Evernote-
cfeed607-6aa4-4bbd-9627-b637deb723c8 New or Renamed User Account with '$' in Attribute 'SamAccountName' HomeGroupUser\$
7b449a5e-1db5-4dd0-a2dc-4e3a67282538 Hidden Local User Creation HomeGroupUser\$
29 1f2b5353-573f-4880-8e33-7d04dcf97744 Sysmon Configuration Modification Computer: evtx-PC
30 734f8d9b-42b8-41b2-bcf5-abaf49d5a3c8 Remote PowerShell Session Host Process (WinRM) WIN-FPV0DSIC9O6
31 734f8d9b-42b8-41b2-bcf5-abaf49d5a3c8 Remote PowerShell Session Host Process (WinRM) Computer: Agamemnon