
title: New Lolbin Process by Office Applications
author: Vadim Khrykov (ThreatIntel), Cyb3rEng (Rule)
date: 2021/08/23
description: This rule will monitor any office apps that spins up a new LOLBin process.
  This activity is pretty suspicious and should be investigated.
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    Image:
    - '*regsvr32'
    - '*rundll32'
    - '*msiexec'
    - '*mshta'
    - '*verclsid'
  SELECTION_3:
    ParentImage:
    - '*winword.exe'
    - '*excel.exe'
    - '*powerpnt.exe'
  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
falsepositives:
- Unknown
id: 23daeb52-e6eb-493c-8607-c4f0246cb7d8
level: high
logsource:
  category: process_creation
  product: windows
references:
- https://thedfirreport.com/2021/03/29/sodinokibi-aka-revil-ransomware/
- https://github.com/vadim-hunter/Detection-Ideas-Rules/blob/main/Threat%20Intelligence/The%20DFIR%20Report/20210329_Sodinokibi_(aka_REvil)_Ransomware.yaml
status: experimental
tags:
- attack.t1204.002
- attack.t1047
- attack.t1218.010
- attack.execution
- attack.defense_evasion
ruletype: SIGMA
