Detection rules › Sigma

Remote Access Tool - Ammy Admin Agent Execution

Status
test
Severity
medium
Log source
category process_creation, product windows
Author
@kostastsale
Source
github.com/SigmaHQ/sigma

Detects the execution of the Ammy Admin RMM agent for remote management.

Known false positives

  • Legitimate use of Ammy Admin RMM agent for remote management by admins.

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique
PersistenceNo specific technique

Telemetry coverage

Rule body

title: Remote Access Tool - Ammy Admin Agent Execution
id: 7da7809e-f3d5-47a3-9d5d-fc9d019caf14
status: test
description: Detects the execution of the Ammy Admin RMM agent for remote management.
references:
    - https://www.ammyy.com/en/admin_features.html
author: '@kostastsale'
date: 2024-08-05
tags:
    - attack.execution
    - attack.persistence
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\rundll32.exe'
        CommandLine|contains: 'AMMYY\aa_nts.dll",run'
    condition: selection
falsepositives:
    - Legitimate use of Ammy Admin RMM agent for remote management by admins.
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '\rundll32.exe'
    CommandLine|contains: 'AMMYY\aa_nts.dll",run'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • AMMYY\aa_nts.dll",run
field:"CommandLine" kind:match
Imageends_with
  • \rundll32.exe corpus 94 (sigma 94)
field:"Image" kind:ends_with value:"\rundll32.exe"