Sigma rule: Potential Conti Ransomware Activity

Rule

Title

Potential Conti Ransomware Activity

Status

test

Level

critical

Author

frack113

Date

2021-10-12

Modified

2023-02-13

File

rules-emerging-threats/2021/Malware/Conti/proc_creation_win_malware_conti_ransomware_commands.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a specific command used by the Conti ransomware group

Log source

product

windows

category

process_creation

Detection

selection:
    CommandLine|contains|all:
        - '-m '
        - '-net '
        - '-size ' # Size 10 in references
        - '-nomutex '
        - '-p \\\\'
        - '$'
condition: selection

False positives (as the rule lists them)

• Unlikely

Tags

• attack.impact
• attack.s0575
• attack.t1486
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• S0575
• T1486

References

• https://news.sophos.com/en-us/2021/09/03/conti-affiliates-use-proxyshell-exchange-exploit-in-ransomware-attacks/
• https://twitter.com/VK_Intel/status/1447795359900704769?t=Xz7vaLTvaaCZ5kHoZa6gMw&s=19

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/2021/Malware/Conti/proc_creation_win_malware_conti_ransomware_commands.yml