Emerging Threathightest
Lace Tempest PowerShell Evidence Eraser
Detects a PowerShell script used by Lace Tempest APT to erase evidence from victim servers by exploiting CVE-2023-47246 as reported by SysAid Team
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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
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
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script
Definition
Requirements: Script Block Logging must be enabled
Detection Logic
Detection Logic1 selector
detection:
selection:
ScriptBlockText|contains|all:
- 'cleanLL'
- 'usersfiles.war'
- 'Remove-Item -Path "$tomcat_dir'
- 'SysAidServer'
- 'sleep '
- 'while(1)'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Rule Metadata
Rule ID
b377ddab-502d-4519-9e8c-5590033d2d70
Status
test
Level
high
Type
Emerging Threat
Created
Thu Nov 09
Path
rules-emerging-threats/2023/TA/Lace-Tempest/posh_ps_apt_lace_tempest_eraser_script.yml
Raw Tags
attack.executionattack.t1059.001detection.emerging-threats