Lace Tempest PowerShell Launcher

 1title: Lace Tempest PowerShell Launcher
 2id: 37dc5463-f7e3-4f61-ad76-ba59cd02a651
 3status: test
 4description: |
 5        Detects a PowerShell script used by Lace Tempest APT to launch their malware loader by exploiting CVE-2023-47246 as reported by SysAid Team
 6references:
 7    - https://www.sysaid.com/blog/service-desk/on-premise-software-security-vulnerability-notification
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2023-11-09
10tags:
11    - attack.execution
12    - attack.t1059.001
13    - detection.emerging-threats
14logsource:
15    product: windows
16    category: ps_script
17    definition: 'Requirements: Script Block Logging must be enabled'
18detection:
19    selection:
20        ScriptBlockText|contains|all:
21            - '\SysAidServer\tomcat\webapps'
22            - 'Starting user.exe'
23            - '\usersfiles\user.exe'
24            - 'Remove-Item -Force "$wapps'
25            - '(Sophos).'
26    condition: selection
27falsepositives:
28    - Unlikely
29level: high