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Detectionmediumtest

File Download via CertOC.EXE

Detects when a user downloads a file by using CertOC.exe

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Launch
Nasreddine Bencherchali (Nextron Systems)Created Mon May 16Updated Wed Oct 1870ad0861-d1fe-491c-a45f-fa48148a300dwindows
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_img:
        - Image|endswith: '\certoc.exe'
        - OriginalFileName: 'CertOC.exe'
    selection_cli:
        CommandLine|contains|all:
            - '-GetCACAPS'
            - 'http'
    condition: all of selection*
False Positives
Unknown

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

References
1
Resolving title…
lolbas-project.github.io
MITRE ATT&CK
Related Rules
SimilarDetectionhigh

File Download From IP Based URL Via CertOC.EXE

Detects when a user downloads a file from an IP based URL using CertOC.exe

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

Rule Metadata
Rule ID
70ad0861-d1fe-491c-a45f-fa48148a300d
Status
test
Level
medium
Type
Detection
Created
Mon May 16
Modified
Wed Oct 18
Author
Nasreddine Bencherchali (Nextron Systems)
Path
rules/windows/process_creation/proc_creation_win_certoc_download.yml
Raw Tags
attack.command-and-controlattack.t1105
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