Cicada Ransomware PSExec File Creation

calendar Sep 9, 2024 · attack.lateral-movement attack.execution attack.t1570 attack.t1569 attack.t1569.002 attack.s0029  ·
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Detects creation of a lightly-renamed PSExec file in C:\Users\Public, as observed in the Cicada3301 Ransomware report from MorphiSec.

Sigma rule (View on GitHub)

 1title: Cicada Ransomware PSExec File Creation
 2id: 76cdd984-4b2b-465d-908f-d55ead0cdc9e
 3status: experimental
 4description: Detects creation of a lightly-renamed PSExec file in C:\Users\Public, as observed in the Cicada3301 Ransomware report from MorphiSec.
 5references:
 6    - https://blog.morphisec.com/cicada3301-ransomware-threat-analysis
 7author: 'Micah Babinski, Based on Morphisec report by Michael Gorelik (@smgoreli)'
 8date: 2024-09-07
 9tags:
10    - attack.lateral-movement
11    - attack.execution
12    - attack.t1570
13    - attack.t1569
14    - attack.t1569.002
15    - attack.s0029
16logsource:
17    category: file_event
18    product: windows
19detection:
20    selection:
21        TargetFilename|contains: 'psexec'
22        TargetFilename|startswith: 'C:\Users\Public'
23    filter:
24        TargetFilename|endswith: '\psexec.exe'
25    condition: selection and not filter
26falsepositives:
27    - Unknown
28level: medium```

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