Detectionhightest
Potential PSFactoryBuffer COM Hijacking
Detects changes to the PSFactory COM InProcServer32 registry. This technique was used by RomCom to create persistence storing a malicious DLL.
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BlackBerry Threat Research and Intelligence TeamCreated Wed Jun 07Updated Thu Aug 17243380fa-11eb-4141-af92-e14925e77c1bwindows
Log Source
WindowsRegistry Set
ProductWindows← raw: windows
CategoryRegistry Set← raw: registry_set
Detection Logic
Detection Logic2 selectors
detection:
selection:
TargetObject|endswith: '\CLSID\{c90250f3-4d7d-4991-9b69-a5c5bc1c2ae6}\InProcServer32\(Default)'
filter_main:
Details:
- '%windir%\System32\ActXPrxy.dll'
- 'C:\Windows\System32\ActXPrxy.dll'
condition: selection and not filter_mainFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Rule Metadata
Rule ID
243380fa-11eb-4141-af92-e14925e77c1b
Status
test
Level
high
Type
Detection
Created
Wed Jun 07
Modified
Thu Aug 17
Path
rules/windows/registry/registry_set/registry_set_persistence_comhijack_psfactorybuffer.yml
Raw Tags
attack.privilege-escalationattack.persistenceattack.t1546.015