Sigma rule: Renamed MegaSync Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-e5f148e25951, updated 2023-02-03T00:00:00.000Z.

Rule

Title
Renamed MegaSync Execution
Status
test
Level
high
Author
Sittikorn S
Date
2021-06-22
Modified
2023-02-03
File
rules/windows/process_creation/proc_creation_win_renamed_megasync.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the execution of a renamed MegaSync.exe as seen used by ransomware families like Nefilim, Sodinokibi, Pysa, and Conti.

Log source

product
windows
category
process_creation

Detection

selection:
    OriginalFileName: 'megasync.exe'
filter:
    Image|endswith: '\megasync.exe'
condition: selection and not filter

False positives (as the rule lists them)

  • Software that illegally integrates MegaSync in a renamed form
  • Administrators that have renamed MegaSync

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_renamed_megasync.yml

Sources and licences

  • SigmaHQ

    "Renamed MegaSync Execution" by Sittikorn S (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_renamed_megasync.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: Renamed MegaSync Execution",
entity page, dataset version ref-e5f148e25951, updated 2023-02-03T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/643bdcac-8b82-49f4-9fd9-25a90b929f3b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 643bdcac-8b82-49f4-9fd9-25a90b929f3b, 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.