Detectionmediumtest
Uncommon Child Process Of AddinUtil.EXE
Detects uncommon child processes of the Add-In deployment cache updating utility (AddInutil.exe) which could be a sign of potential abuse of the binary to proxy execution via a custom Addins.Store payload.
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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 Logic2 selectors
detection:
selection:
ParentImage|endswith: '\addinutil.exe'
filter_main_werfault:
Image|endswith:
- ':\Windows\System32\conhost.exe'
- ':\Windows\System32\werfault.exe'
- ':\Windows\SysWOW64\werfault.exe'
condition: 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
b5746143-59d6-4603-8d06-acbd60e166ee
Status
test
Level
medium
Type
Detection
Created
Mon Sep 18
Author
Path
rules/windows/process_creation/proc_creation_win_addinutil_uncommon_child_process.yml
Raw Tags
attack.defense-evasionattack.t1218