Emerging Threathightest
Lace Tempest PowerShell Launcher
Detects a PowerShell script used by Lace Tempest APT to launch their malware loader by exploiting CVE-2023-47246 as reported by SysAid Team
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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
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:
- '\SysAidServer\tomcat\webapps'
- 'Starting user.exe'
- '\usersfiles\user.exe'
- 'Remove-Item -Force "$wapps'
- '(Sophos).'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Rule Metadata
Rule ID
37dc5463-f7e3-4f61-ad76-ba59cd02a651
Status
test
Level
high
Type
Emerging Threat
Created
Thu Nov 09
Path
rules-emerging-threats/2023/TA/Lace-Tempest/posh_ps_apt_lace_tempest_malware_launcher.yml
Raw Tags
attack.executionattack.t1059.001detection.emerging-threats