title: SOURGUM Actor Behaviours
id: 7ba08e95-1e0b-40cd-9db5-b980555e42fd
description: Suspicious behaviours related to an actor tracked by Microsoft as SOURGUM
author: MSTIC, FPT.EagleEye
status: experimental
level: high
references:
    - https://www.virustotal.com/gui/file/c299063e3eae8ddc15839767e83b9808fd43418dc5a1af7e4f44b97ba53fbd3d/detection
    - https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/SOURGUM_IOC.yaml
    - https://www.microsoft.com/security/blog/2021/07/15/protecting-customers-from-a-private-sector-offensive-actor-using-0-day-exploits-and-devilstongue-malware/
date: 2021/06/15
modified: 2021/07/30
tags:
    - attack.t1546
    - attack.t1546.015
    - attack.persistence
    - attack.privilege_escalation
logsource:
    product: windows
    category: process_creation
detection:
    selection1:
        Image|contains: 'windows\system32\Physmem.sys'
    selection2:
        Image|contains: 
            - 'Windows\system32\ime\SHARED\WimBootConfigurations.ini'
            - 'Windows\system32\ime\IMEJP\WimBootConfigurations.ini'
            - 'Windows\system32\ime\IMETC\WimBootConfigurations.ini'
    selection3:
        Image|contains:
            - 'windows\system32\filepath2'
            - 'windows\system32\ime'
    registry_command:
        CommandLine|contains:
            - 'reg add'
    registry_key:
        CommandLine|contains: 
            - 'HKEY_LOCAL_MACHINE\software\classes\clsid\{7c857801-7381-11cf-884d-00aa004b2e24}\inprocserver32'
            - 'HKEY_LOCAL_MACHINE\software\classes\clsid\{cf4cc405-e2c5-4ddd-b3ce-5e7582d8c9fa}\inprocserver32'
    condition: selection1 or selection2 or (selection3 and registry_command and registry_key)
falsepositives:
    - Unknown