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This query looks for potential webshell creation by the threat actor Mercury after the sucessful exploitation of SysAid server. Reference: https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/
| Attribute | Value |
|---|---|
| Type | Analytic Rule |
| Solution | Web Shells Threat Protection |
| ID | 50eb4cbd-188f-44f4-b964-bab84dcdec10 |
| Severity | High |
| Kind | Scheduled |
| Tactics | InitialAccess |
| Techniques | T1190 |
| Required Connectors | SecurityEvents, WindowsSecurityEvents, MicrosoftThreatProtection |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
DeviceFileEvents |
✓ | ✗ | ? | |
SecurityEvent |
AccessMask in "0x10,0x100,0x2,0x4"CommandLine has "SysAidServer"EventID in "4663,4688"ObjectName endswith ".jsp"Process has_any "java.exe" |
✓ | ✓ | ✓ |
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