Sigma rule: PUA - CsExec Execution

Rule

Title

PUA - CsExec Execution

Status

test

Level

high

Author

Florian Roth (Nextron Systems)

Date

2022-08-22

Modified

2023-02-21

File

rules/windows/process_creation/proc_creation_win_pua_csexec.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of the lesser known remote execution tool named CsExec a PsExec alternative

Log source

product

windows

category

process_creation

Detection

selection:
    Image|endswith: '\csexec.exe'
selection_pe:
    Description: 'csexec'
condition: 1 of selection*

False positives (as the rule lists them)

• Unknown

Tags

• attack.resource-development
• attack.t1587.001
• attack.execution
• attack.t1569.002

MITRE ATT&CK ids this rule names

• T1569.002
• T1587.001

References

• https://github.com/malcomvetter/CSExec
• https://www.microsoft.com/security/blog/2022/05/09/ransomware-as-a-service-understanding-the-cybercrime-gig-economy-and-how-to-protect-yourself/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_csexec.yml