Emerging Threathightest
Lace Tempest File Indicators
Detects PowerShell script file creation with specific names or suffixes which was seen being used often in PowerShell scripts by FIN7
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsFile Event
ProductWindows← raw: windows
CategoryFile Event← raw: file_event
Events for file system activity including creation, modification, and deletion.
Detection Logic
Detection Logic1 selector
detection:
selection:
- TargetFilename|endswith:
- ':\Program Files\SysAidServer\tomcat\webapps\usersfiles\user.exe'
- ':\Program Files\SysAidServer\tomcat\webapps\usersfiles.war'
- ':\Program Files\SysAidServer\tomcat\webapps\leave'
- TargetFilename|contains: ':\Program Files\SysAidServer\tomcat\webapps\user.'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Tactics
Other
detection.emerging-threats
Rule Metadata
Rule ID
e94486ea-2650-4548-bf25-88cbd0bb32d7
Status
test
Level
high
Type
Emerging Threat
Created
Thu Nov 09
Path
rules-emerging-threats/2023/TA/Lace-Tempest/file_event_win_apt_lace_tempest_indicators.yml
Raw Tags
attack.executiondetection.emerging-threats