Detectionmediumtest

DLL Loaded via CertOC.EXE

Detects when a user installs certificates by using CertOC.exe to loads the target DLL file.

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Launch

Austin SongerCreated Sat Oct 23Updated Tue Mar 05242301bc-f92f-4476-8718-78004a6efd9fwindows

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:
    selection_img:
        - Image|endswith: '\certoc.exe'
        - OriginalFileName: 'CertOC.exe'
    selection_cli:
        CommandLine|contains|windash: ' -LoadDLL '
    condition: all of selection_*

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

lolbas-project.github.io

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion

Techniques

T1218 · System Binary Proxy Execution

Related Rules

SimilarDetectionhigh

Suspicious DLL Loaded via CertOC.EXE

Detects when a user installs certificates by using CertOC.exe to load the target DLL file.

Detects similar activity. Both rules may fire on overlapping events.

Rule Metadata

Rule ID

242301bc-f92f-4476-8718-78004a6efd9f

Status

test

Level

medium

Type

Detection

Created

Sat Oct 23

Modified

Tue Mar 05

Author

Austin Songer

Path

rules/windows/process_creation/proc_creation_win_certoc_load_dll.yml

Raw Tags

attack.defense-evasionattack.t1218

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