sigmahighHunting

Change the Fax Dll

Detect possible persistence using Fax DLL load when service restart

MITRE ATT&CK

persistencedefense-evasion

Detection Query

selection:
  TargetObject|contains|all:
    - \Software\Microsoft\Fax\Device Providers\
    - \ImageName
filter:
  Details: "%systemroot%\\system32\\fxst30.dll"
condition: selection and not filter

Author

frack113

Created

2022-07-17

Data Sources

windowsRegistry Set Events

Platforms

windows

References

Tags

attack.persistenceattack.defense-evasionattack.t1112

Raw Content

title: Change the Fax Dll
id: 9e3357ba-09d4-4fbd-a7c5-ad6386314513
status: test
description: Detect possible persistence using Fax DLL load when service restart
references:
    - https://twitter.com/dottor_morte/status/1544652325570191361
    - https://raw.githubusercontent.com/RiccardoAncarani/talks/master/F-Secure/unorthodox-lateral-movement.pdf
author: frack113
date: 2022-07-17
modified: 2022-12-30
tags:
    - attack.persistence
    - attack.defense-evasion
    - attack.t1112
logsource:
    product: windows
    category: registry_set
detection:
    selection:
        TargetObject|contains|all:
            - '\Software\Microsoft\Fax\Device Providers\'
            - '\ImageName'
    filter:
        Details: '%systemroot%\system32\fxst30.dll' # Windows 10
    condition: selection and not filter
falsepositives:
    - Unknown
level: high