sigmaDRL-1.1from SigmaHQ/sigma

Suspicious High IntegrityLevel Conhost Legacy Option

ForceV1 asks for information directly from the kernel space. Conhost connects to the console application. High IntegrityLevel means the process is running with elevated privileges, such as an Administrator context.

Quality

100

FP risk

—

Forks

Views

ATT&CK techniques

T1202

Rule sourcerules/windows/process_creation/proc_creation_win_conhost_legacy_option.yml

title: Suspicious High IntegrityLevel Conhost Legacy Option
id: 3037d961-21e9-4732-b27a-637bcc7bf539
status: test
description: ForceV1 asks for information directly from the kernel space. Conhost connects to the console application. High IntegrityLevel means the process is running with elevated privileges, such as an Administrator context.
references:
    - https://cybercryptosec.medium.com/covid-19-cyber-infection-c615ead7c29
    - https://thedfirreport.com/2022/04/04/stolen-images-campaign-ends-in-conti-ransomware/
    - https://learn.microsoft.com/en-us/windows/win32/secauthz/mandatory-integrity-control
author: frack113
date: 2022-12-09
modified: 2024-12-01
tags:
    - attack.defense-evasion
    - attack.t1202
logsource:
    product: windows
    category: process_creation
detection:
    selection:
        IntegrityLevel:
            - 'High'
            - 'S-1-16-12288'
        CommandLine|contains|all:
            - 'conhost.exe'
            - '0xffffffff'
            - '-ForceV1'
    condition: selection
falsepositives:
    - Very Likely, including launching cmd.exe via Run As Administrator
level: informational