Detection rules › Sigma

HackTool - GMER Rootkit Detector and Remover Execution

Status
test
Severity
high
Log source
category process_creation, product windows
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects the execution GMER tool based on image and hash fields.

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
StealthNo specific technique

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation

Rule body

title: HackTool - GMER Rootkit Detector and Remover Execution
id: 9082ff1f-88ab-4678-a3cc-5bcff99fc74d
status: test
description: Detects the execution GMER tool based on image and hash fields.
references:
    - http://www.gmer.net/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-10-05
modified: 2024-11-23
tags:
    - attack.stealth
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith: '\gmer.exe'
    selection_sysmon_hash:
        Hashes|contains:
            - 'MD5=E9DC058440D321AA17D0600B3CA0AB04'
            - 'SHA1=539C228B6B332F5AA523E5CE358C16647D8BBE57'
            - 'SHA256=E8A3E804A96C716A3E9B69195DB6FFB0D33E2433AF871E4D4E1EAB3097237173'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

1 of selection_*

Stage 1: selection_img

selection_img:
    Image|endswith: '\gmer.exe'

Stage 2: selection_sysmon_hash

selection_sysmon_hash:
    Hashes|contains:
        - 'MD5=E9DC058440D321AA17D0600B3CA0AB04'
        - 'SHA1=539C228B6B332F5AA523E5CE358C16647D8BBE57'
        - 'SHA256=E8A3E804A96C716A3E9B69195DB6FFB0D33E2433AF871E4D4E1EAB3097237173'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Hashesmatch
  • MD5=E9DC058440D321AA17D0600B3CA0AB04
  • SHA1=539C228B6B332F5AA523E5CE358C16647D8BBE57
  • SHA256=E8A3E804A96C716A3E9B69195DB6FFB0D33E2433AF871E4D4E1EAB3097237173
field:"Hashes" kind:match
Imageends_with
  • \gmer.exe
field:"Image" kind:ends_with value:"\gmer.exe"