Anydesk Temporary Artefact

Status: test
Severity: medium
Log source: category file_event, product windows
Author: frack113
Source: github.com/SigmaHQ/sigma

An adversary may use legitimate desktop support and remote access software, such as Team Viewer, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target systems within networks. These services are commonly used as legitimate technical support software, and may be allowed by application control within a target environment. Remote access tools like VNC, Ammyy, and Teamviewer are used frequently when compared with other legitimate software commonly used by adversaries. (Citation: Symantec Living off the Land)

Known false positives

Legitimate use

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1219.002` Remote Access Tools: Remote Desktop Software

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 11: FileCreate

Rule body

title: Anydesk Temporary Artefact
id: 0b9ad457-2554-44c1-82c2-d56a99c42377
status: test
description: |
    An adversary may use legitimate desktop support and remote access software, such as Team Viewer, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target systems within networks.
    These services are commonly used as legitimate technical support software, and may be allowed by application control within a target environment.
    Remote access tools like VNC, Ammyy, and Teamviewer are used frequently when compared with other legitimate software commonly used by adversaries. (Citation: Symantec Living off the Land)
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1219/T1219.md#atomic-test-2---anydesk-files-detected-test-on-windows
author: frack113
date: 2022-02-11
modified: 2024-07-20
tags:
    - attack.command-and-control
    - attack.t1219.002
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|contains:
            - '\AppData\Roaming\AnyDesk\user.conf'
            - '\AppData\Roaming\AnyDesk\system.conf'
    condition: selection
falsepositives:
    - Legitimate use
level: medium
regression_tests_path: regression_data/rules/windows/file/file_event/file_event_win_anydesk_artefact/info.yml

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    TargetFilename|contains:
        - '\AppData\Roaming\AnyDesk\user.conf'
        - '\AppData\Roaming\AnyDesk\system.conf'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`TargetFilename`	match	`\AppData\Roaming\AnyDesk\system.conf` `\AppData\Roaming\AnyDesk\user.conf`	`field:"TargetFilename" kind:match`