Griffon Malware Attack Pattern

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

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

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

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

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`.txt` corpus 9 (sigma 9) `//b /e:jscript` `\local\temp\` corpus 2 (sigma 2)	`field:"CommandLine" kind:match`

Griffon Malware Attack Pattern

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`