Detection rules › Sigma
DNS Query Request By QuickAssist.EXE
Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish a session.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Lateral Movement | T1210 Exploitation of Remote Services |
| Command & Control | T1071.001 Application Layer Protocol: Web Protocols |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 22 | DNSEvent (DNS query) |
Rule body yaml
title: DNS Query Request By QuickAssist.EXE
id: 882e858a-3233-4ba8-855e-2f3d3575803d
status: experimental
description: |
Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish a session.
references:
- https://www.microsoft.com/en-us/security/blog/2024/05/15/threat-actors-misusing-quick-assist-in-social-engineering-attacks-leading-to-ransomware/
- https://www.linkedin.com/posts/kevin-beaumont-security_ive-been-assisting-a-few-orgs-hit-with-successful-activity-7268055739116445701-xxjZ/
- https://x.com/cyb3rops/status/1862406110365245506
- https://learn.microsoft.com/en-us/windows/client-management/client-tools/quick-assist
author: Muhammad Faisal (@faisalusuf)
date: 2024-12-19
tags:
- attack.command-and-control
- attack.initial-access
- attack.lateral-movement
- attack.t1071.001
- attack.t1210
logsource:
category: dns_query
product: windows
detection:
selection:
Image|endswith: '\QuickAssist.exe'
QueryName|endswith: 'remoteassistance.support.services.microsoft.com'
condition: selection
falsepositives:
- Legitimate use of Quick Assist in the environment.
level: low
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith: '\QuickAssist.exe'
QueryName|endswith: 'remoteassistance.support.services.microsoft.com'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.