Sigma rule: DNS Query Request By QuickAssist.EXE

Rule

Title

DNS Query Request By QuickAssist.EXE

Status

experimental

Level

low

Author

Muhammad Faisal (@faisalusuf)

Date

2024-12-19

File

rules/windows/dns_query/dns_query_win_quickassist.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish a session.

Log source

product

windows

category

dns_query

Detection

selection:
    Image|endswith: '\QuickAssist.exe'
    QueryName|endswith: 'remoteassistance.support.services.microsoft.com'
condition: selection

False positives (as the rule lists them)

• Legitimate use of Quick Assist in the environment.

Tags

• attack.command-and-control
• attack.initial-access
• attack.lateral-movement
• attack.t1071.001
• attack.t1210

MITRE ATT&CK ids this rule names

• T1071.001
• T1210

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

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/dns_query/dns_query_win_quickassist.yml