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Detection rules › Sigma

Potential EmpireMonkey Activity

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

Detects potential EmpireMonkey APT activity

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Stealth

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation
Security-AuditingEvent ID 4688: A new process has been created.

Rule body

title: Potential EmpireMonkey Activity
id: 10152a7b-b566-438f-a33c-390b607d1c8d
status: test
description: Detects potential EmpireMonkey APT activity
references:
    - https://securelist.com/fin7-5-the-infamous-cybercrime-rig-fin7-continues-its-activities/90703/
    - https://malpedia.caad.fkie.fraunhofer.de/actor/anthropoid_spider
author: Markus Neis, Nasreddine Bencherchali (Nextron Systems)
date: 2019-04-02
modified: 2023-03-09
tags:
    - attack.stealth
    - attack.t1218.010
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - '/e:jscript' # This is a guess since the report doesn't mention the method of execution. This assumes that it is achieved via specifying the execution engine
            - '\Local\Temp\Errors.bat'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    CommandLine|contains|all:
        - '/e:jscript'
        - '\Local\Temp\Errors.bat'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • /e:jscript
  • \Local\Temp\Errors.bat
field:"CommandLine" kind:match