SyncAppvPublishingServer Execution to Bypass Powershell Restriction — Sigma Rule

Rule metadata and linked tags

Author: Ensar Şamil, @sblmsrsn, OSCD Community. Source status: test; severity: medium. Source dates: 2020-10-05 / 2022-12-25.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 682118f1317ad09783c5d5e05f985248b9a03bb84a9f6d3eda1bb3881292b2b6

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: SyncAppvPublishingServer Execution to Bypass Powershell Restriction
id: dddfebae-c46f-439c-af7a-fdb6bde90218
related:
    - id: fde7929d-8beb-4a4c-b922-be9974671667
      type: derived
    - id: 9f7aa113-9da6-4a8d-907c-5f1a4b908299
      type: derived
status: test
description: Detects SyncAppvPublishingServer process execution which usually utilized by adversaries to bypass PowerShell execution restrictions.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Syncappvpublishingserver/
author: 'Ensar Şamil, @sblmsrsn, OSCD Community'
date: 2020-10-05
modified: 2022-12-25
tags:
    - attack.stealth
    - attack.t1218
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains: 'SyncAppvPublishingServer.exe'
    condition: selection
falsepositives:
    - App-V clients
level: medium

Original YAML and metadata in JSON

False positives

• App-V clients

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Syncappvpublishingserver/