
title: Operation Wocao Activity
author: Florian Roth, frack113
date: 2019/12/20
description: Detects activity mentioned in Operation Wocao report
detection:
  SELECTION_1:
    EventID: 4799
  SELECTION_2:
    TargetUserName: Administr*
  SELECTION_3:
    CallerProcessName: '*\checkadmin.exe'
  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
falsepositives:
- Administrators that use checkadmin.exe tool to enumerate local administrators
id: 74ad4314-482e-4c3e-b237-3f7ed3b9ca8d
level: high
logsource:
  product: windows
  service: security
modified: 2021/09/19
references:
- https://www.fox-it.com/en/news/whitepapers/operation-wocao-shining-a-light-on-one-of-chinas-hidden-hacking-groups/
- https://twitter.com/SBousseaden/status/1207671369963646976
status: experimental
tags:
- attack.discovery
- attack.t1012
- attack.defense_evasion
- attack.t1036.004
- attack.t1036
- attack.t1027
- attack.execution
- attack.t1053.005
- attack.t1053
- attack.t1059.001
- attack.t1086
ruletype: SIGMA
