Detectionmediumtest
Uncommon AddinUtil.EXE CommandLine Execution
Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with uncommon Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.
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Launch
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection_img:
- Image|endswith: '\addinutil.exe'
- OriginalFileName: 'AddInUtil.exe'
selection_cli:
CommandLine|contains:
- '-AddInRoot:'
- '-PipelineRoot:'
filter_main_addinroot:
CommandLine|contains:
- '-AddInRoot:"C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA'
- '-AddInRoot:C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA'
- '-PipelineRoot:"C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA'
- '-PipelineRoot:C:\Program Files (x86)\Common Files\Microsoft Shared\VSTA'
condition: all of selection_* and not 1 of filter_main_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
4f2cd9b6-4a17-440f-bb2a-687abb65993a
Status
test
Level
medium
Type
Detection
Created
Mon Sep 18
Author
Path
rules/windows/process_creation/proc_creation_win_addinutil_uncommon_cmdline.yml
Raw Tags
attack.defense-evasionattack.t1218