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Detection rules › Sigma

Griffon Malware Attack Pattern

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

Detects process execution patterns related to Griffon malware as reported by Kaspersky

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation
Security-AuditingEvent ID 4688A new process has been created.

Rule body yaml

title: Griffon Malware Attack Pattern
id: bcc6f179-11cd-4111-a9a6-0fab68515cf7
status: test
description: Detects process execution patterns related to Griffon malware as reported by Kaspersky
references:
    - https://securelist.com/fin7-5-the-infamous-cybercrime-rig-fin7-continues-its-activities/90703/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-09
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - '\local\temp\'
            - '//b /e:jscript'
            - '.txt'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    CommandLine|contains|all:
        - '\local\temp\'
        - '//b /e:jscript'
        - '.txt'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
CommandLinematch
  • .txt corpus 9 (sigma 9)
  • //b /e:jscript
  • \local\temp\ corpus 2 (sigma 2)