Detectionhightest
File Download From IP Based URL Via CertOC.EXE
Detects when a user downloads a file from an IP based URL using CertOC.exe
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Launch
Nasreddine Bencherchali (Nextron Systems)Created Wed Oct 18b86f6dea-0b2f-41f5-bdcc-a057bd19cd6awindows
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_ip:
CommandLine|re: '://[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
selection_cli:
CommandLine|contains: '-GetCACAPS'
condition: all of selection*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Rule Metadata
Rule ID
b86f6dea-0b2f-41f5-bdcc-a057bd19cd6a
Status
test
Level
high
Type
Detection
Created
Wed Oct 18
Path
rules/windows/process_creation/proc_creation_win_certoc_download_direct_ip.yml
Raw Tags
attack.command-and-controlattack.executionattack.t1105