Rorschach Ransomware Execution Activity

calendar Mar 1, 2024 · attack.execution attack.t1059.003 attack.t1059.001 attack.defense_evasion detection.emerging_threats  ·
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Detects Rorschach ransomware execution activity

Sigma rule (View on GitHub)

 1title: Rorschach Ransomware Execution Activity
 2id: 0e9e6c63-1350-48c4-9fa1-7ccb235edc68
 3status: test
 4description: Detects Rorschach ransomware execution activity
 5references:
 6    - https://research.checkpoint.com/2023/rorschach-a-new-sophisticated-and-fast-ransomware/
 7author: X__Junior (Nextron Systems)
 8date: 2023/04/04
 9modified: 2023/04/22
10tags:
11    - attack.execution
12    - attack.t1059.003
13    - attack.t1059.001
14    - attack.defense_evasion
15    - detection.emerging_threats
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        Image|endswith:
22            - '\bcdedit.exe'
23            - '\net.exe'
24            - '\net1.exe'
25            - '\netsh.exe'
26            - '\wevtutil.exe'
27            - '\vssadmin.exe'
28        CommandLine|contains: '11111111'
29    condition: selection
30falsepositives:
31    - Unlikely
32level: critical

References

  • Rorschach – A New Sophisticated and Fast Ransomware - Check Point Research

    Research by: Jiri  Vinopal, Dennis Yarizadeh and Gil Gekker Key Findings: Introduction While responding to a ransomware case against a US-based company, the CPIRT recently came across a unique ransomware strain deployed using a signed component of a commercial security product. Unlike other ransomware cases, the threat actor did not hide behind any alias and appears […]


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