Sigma rule: Suspicious Vsls-Agent Command With AgentExtensionPath Load

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-005959961de5, updated 2022-10-30T00:00:00.000Z.

Rule

Title
Suspicious Vsls-Agent Command With AgentExtensionPath Load
Status
test
Level
medium
Author
bohops
Date
2022-10-30
File
rules/windows/process_creation/proc_creation_win_vslsagent_agentextensionpath_load.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Microsoft Visual Studio vsls-agent.exe lolbin execution with a suspicious library load using the --agentExtensionPath parameter

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\vsls-agent.exe'
    CommandLine|contains: '--agentExtensionPath'
filter:
    CommandLine|contains: 'Microsoft.VisualStudio.LiveShare.Agent.'
condition: selection and not filter

False positives (as the rule lists them)

  • False positives depend on custom use of vsls-agent.exe

Tags

  • attack.stealth
  • attack.t1218

MITRE ATT&CK ids this rule names

References

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/process_creation/proc_creation_win_vslsagent_agentextensionpath_load.yml

Sources and licences

  • SigmaHQ

    "Suspicious Vsls-Agent Command With AgentExtensionPath Load" by bohops (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_vslsagent_agentextensionpath_load.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Suspicious Vsls-Agent Command With AgentExtensionPath Load",
entity page, dataset version ref-005959961de5, updated 2022-10-30T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/43103702-5886-11ed-9b6a-0242ac120002 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 43103702-5886-11ed-9b6a-0242ac120002, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.