SigmaHQ/rules/windows/process_creation/win_apt_chafer_mar18.yml

action: global
title: Chafer Activity
id: 53ba33fd-3a50-4468-a5ef-c583635cfa92
description: Detects Chafer activity attributed to OilRig as reported in Nyotron report in March 2018
references:
    - https://nyotron.com/nyotron-discovers-next-generation-oilrig-attacks/
tags:
    - attack.persistence
    - attack.g0049
    - attack.t1053 # an old one
    - attack.t1053.005
    - attack.s0111
    - attack.t1050 # an old one
    - attack.t1543.003
    - attack.defense_evasion
    - attack.t1112
    - attack.command_and_control
    - attack.t1071 # an old one
    - attack.t1071.004
date: 2018/03/23
modified: 2020/08/26
author: Florian Roth, Markus Neis, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community
detection:
    condition: 1 of them
falsepositives:
    - Unknown
level: critical
---
logsource:
    product: windows
    service: system
detection:
    selection_service:
        EventID: 7045
        ServiceName:
            - 'SC Scheduled Scan'
            - 'UpdatMachine'
---
logsource:
    product: windows
    service: security
detection:
    selection_service:
        EventID: 4698
        TaskName:
            - 'SC Scheduled Scan'
            - 'UpdatMachine'
---
logsource:
   category: registry_event
   product: windows
detection:
    selection_reg1:
        TargetObject|endswith: 
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\UMe'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\UT'
---
logsource:
    category: process_creation
    product: windows
detection:
    selection_process0:
        CommandLine|contains: '\Service.exe'
        CommandLine|endswith: 
            - 'i'
            - 'u'
    selection_process1:
        - CommandLine|endswith: '\microsoft\Taskbar\autoit3.exe'
        - CommandLine|startswith: 'C:\wsc.exe'
    selection_process2:
        Image|contains: '\Windows\Temp\DB\'
        Image|endswith: '.exe'
    selection_process3:
        CommandLine|contains|all: 
            - '\nslookup.exe'
            - '-q=TXT'
        ParentImage|contains: '\Autoit'