Potential Conti Ransomware Activity

Detects a specific command used by the Conti ransomware group

title: Potential Conti Ransomware Activity
id: 689308fc-cfba-4f72-9897-796c1dc61487
status: test
description: Detects a specific command used by the Conti ransomware group
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
author: frack113
date: 2021-10-12
modified: 2023-02-13
tags:
    - attack.impact
    - attack.s0575
    - attack.t1486
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - '-m '
            - '-net '
            - '-size ' # Size 10 in references
            - '-nomutex '
            - '-p \\\\'
            - '$'
    condition: selection
falsepositives:
    - Unlikely
level: critical

• T1486Data Encrypted for Impact

• S0575Conti

• 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↗