Remote Access Tool - Simple Help Execution

Status: test
Severity: medium
Log source: category process_creation, product windows
Author: Nasreddine Bencherchali (Nextron Systems)
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 usage of the tool

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 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: Remote Access Tool - Simple Help Execution
id: 95e60a2b-4705-444b-b7da-ba0ea81a3ee2
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://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708
author: Nasreddine Bencherchali (Nextron Systems)
date: 2024-02-23
tags:
    - attack.command-and-control
    - attack.t1219.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|contains:
            - '\JWrapper-Remote Access\'
            - '\JWrapper-Remote Support\'
        Image|endswith: '\SimpleService.exe'
    condition: selection
falsepositives:
    - Legitimate usage of the tool
level: medium

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|contains:
        - '\JWrapper-Remote Access\'
        - '\JWrapper-Remote Support\'
    Image|endswith: '\SimpleService.exe'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Image`	ends_with	`\SimpleService.exe`	`field:"Image" kind:ends_with value:"\SimpleService.exe"`
`Image`	match	`\JWrapper-Remote Access\` `\JWrapper-Remote Support\`	`field:"Image" kind:match`