Sigma rule: Rorschach Ransomware Execution Activity

Rule

Title

Rorschach Ransomware Execution Activity

Status

test

Level

critical

Author

X__Junior (Nextron Systems)

Date

2023-04-04

Modified

2023-04-22

File

rules-emerging-threats/2023/Malware/Rorschach/proc_creation_win_malware_rorschach_ransomware_activity.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Rorschach ransomware execution activity

Log source

product

windows

category

process_creation

Detection

selection:
    Image|endswith:
        - '\bcdedit.exe'
        - '\net.exe'
        - '\net1.exe'
        - '\netsh.exe'
        - '\wevtutil.exe'
        - '\vssadmin.exe'
    CommandLine|contains: '11111111'
condition: selection

False positives (as the rule lists them)

• Unlikely

Tags

• attack.execution
• attack.t1059.003
• attack.t1059.001
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1059.001
• T1059.003

References

• https://research.checkpoint.com/2023/rorschach-a-new-sophisticated-and-fast-ransomware/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/Malware/Rorschach/proc_creation_win_malware_rorschach_ransomware_activity.yml