Suspicious Windows Update Agent Empty Cmdline

 1title: Suspicious Windows Update Agent Empty Cmdline
 2id: 52d097e2-063e-4c9c-8fbb-855c8948d135
 3status: experimental
 4description: Detects suspicious Windows Update Agent activity in which a wuauclt.exe process command line doesn't contain any command line flags
 5references:
 6    - https://redcanary.com/blog/blackbyte-ransomware/
 7author: Florian Roth (Nextron Systems)
 8date: 2022/02/26
 9modified: 2022/05/13
10tags:
11    - attack.defense_evasion
12    - attack.t1036
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\Wuauclt.exe'
19        - OriginalFileName: 'Wuauclt.exe'
20    selection_cli:
21        CommandLine|endswith: '\Wuauclt.exe'
22    condition: all of selection*
23falsepositives:
24    - Unknown
25level: high

References

• ProxyShell exploitation leads to BlackByte ransomware - Red Canary

  

  BlackByte ransomware leverages ProxyShell Microsoft Exchange vulnerabilities for initial access and Cobalt Strike for lateral movement.

  
  Read More

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