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Suspicious Regsvr32 Execution From Remote Share

Detects REGSVR32.exe to execute DLL hosted on remote shares

MITRE ATT&CK

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \regsvr32.exe
  - OriginalFileName: \REGSVR32.EXE
selection_cli:
  CommandLine|contains: " \\\\\\\\"
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-10-31

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://thedfirreport.com/2022/10/31/follina-exploit-leads-to-domain-compromise/

Tags

attack.defense-evasionattack.t1218.010

Raw Content

title: Suspicious Regsvr32 Execution From Remote Share
id: 88a87a10-384b-4ad7-8871-2f9bf9259ce5
status: test
description: Detects REGSVR32.exe to execute DLL hosted on remote shares
references:
    - https://thedfirreport.com/2022/10/31/follina-exploit-leads-to-domain-compromise/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-10-31
tags:
    - attack.defense-evasion
    - attack.t1218.010
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\regsvr32.exe'
        - OriginalFileName: '\REGSVR32.EXE'
    selection_cli:
        CommandLine|contains: ' \\\\'
    condition: all of selection_*
falsepositives:
    - Unknown
# Decrease to medium if this is something common in your org
level: high