Detectionhightest
Suspicious DLL Loaded via CertOC.EXE
Detects when a user installs certificates by using CertOC.exe to load the target DLL file.
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Nasreddine Bencherchali (Nextron Systems)Created Wed Feb 15Updated Tue Mar 0584232095-ecca-4015-b0d7-7726507ee793windows
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: '\certoc.exe'
- OriginalFileName: 'CertOC.exe'
selection_cli:
CommandLine|contains|windash: ' -LoadDLL '
selection_paths:
CommandLine|contains:
- '\Appdata\Local\Temp\'
- '\Desktop\'
- '\Downloads\'
- '\Users\Public\'
- 'C:\Windows\Tasks\'
- 'C:\Windows\Temp\'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
84232095-ecca-4015-b0d7-7726507ee793
Status
test
Level
high
Type
Detection
Created
Wed Feb 15
Modified
Tue Mar 05
Path
rules/windows/process_creation/proc_creation_win_certoc_load_dll_susp_locations.yml
Raw Tags
attack.defense-evasionattack.t1218