Sigma rule: Suspicious UltraVNC Execution
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-72afd677bb7e, updated 2022-03-09T00:00:00.000Z.
Rule
- Title
- Suspicious UltraVNC Execution
- Status
- test
- Level
- high
- Author
- Bhabesh Raj
- Date
- 2022-03-04
- Modified
- 2022-03-09
- File
- rules/windows/process_creation/proc_creation_win_ultravnc_susp_execution.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects suspicious UltraVNC command line flag combination that indicate a auto reconnect upon execution, e.g. startup (as seen being used by Gamaredon threat group)
Log source
- product
- windows
- category
- process_creation
Detection
selection:
CommandLine|contains|all:
- '-autoreconnect '
- '-connect '
- '-id:'
condition: selectionFalse positives (as the rule lists them)
- Unknown
Tags
- attack.lateral-movement
- attack.g0047
- attack.t1021.005
MITRE ATT&CK ids this rule names
References
- https://web.archive.org/web/20220224045756/https://www.ria.ee/sites/default/files/content-editors/kuberturve/tale_of_gamaredon_infection.pdf
- https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/shuckworm-gamaredon-espionage-ukraine
- https://unit42.paloaltonetworks.com/unit-42-title-gamaredon-group-toolset-evolution
- https://uvnc.com/docs/uvnc-viewer/52-ultravnc-viewer-commandline-parameters.html
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_ultravnc_susp_execution.yml
Sources and licences
SigmaHQ
"Suspicious UltraVNC Execution" by Bhabesh Raj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_ultravnc_susp_execution.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: Suspicious UltraVNC Execution",
entity page, dataset version ref-72afd677bb7e, updated 2022-03-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/871b9555-69ca-4993-99d3-35a59f9f3599 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 871b9555-69ca-4993-99d3-35a59f9f3599, 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.