1200KM / sigma-rule
Change the Fax Dll — Sigma Rule
Sigma rule 9e3357ba-09d4-4fbd-a7c5-ad6386314513. Change the Fax Dll — Sigma Rule. Detect possible persistence using Fax DLL load when service restart
Rule metadata and linked tags
Author: frack113. Source status: test; severity: high. Source dates: 2022-07-17 / 2022-12-30.
{
"product": "windows",
"category": "registry_set"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: bbeffa8df3b2b74ce169df3497c7b609994dab2056dc99922e46f0720e3a2a78
Detection logic
Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.
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-impairment
- 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
False positives
- Unknown
Source references
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.