Sigma rule: Network Connection Initiated To Mega.nz

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-62efda9e528c, updated 2024-05-31T00:00:00.000Z.

Rule

Title
Network Connection Initiated To Mega.nz
Status
test
Level
low
Author
Florian Roth (Nextron Systems)
Date
2021-12-06
Modified
2024-05-31
File
rules/windows/network_connection/net_connection_win_domain_mega_nz.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a network connection initiated by a binary to "api.mega.co.nz".
Attackers were seen abusing file sharing websites similar to "mega.nz" in order to upload/download additional payloads.

Log source

product
windows
category
network_connection

Detection

selection:
    Initiated: 'true'
    DestinationHostname|endswith:
        - 'mega.co.nz'
        - 'mega.nz'
condition: selection

False positives (as the rule lists them)

  • Legitimate MEGA installers and utilities are expected to communicate with this domain. Exclude hosts that are known to be allowed to use this tool.

Tags

  • attack.exfiltration
  • attack.t1567.002

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/network_connection/net_connection_win_domain_mega_nz.yml

Sources and licences

  • SigmaHQ

    "Network Connection Initiated To Mega.nz" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/network_connection/net_connection_win_domain_mega_nz.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: Network Connection Initiated To Mega.nz",
entity page, dataset version ref-62efda9e528c, updated 2024-05-31T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/fdeebdf0-9f3f-4d08-84a6-4c4d13e39fe4 (accessed 2026-11-03).
Underlying source: SigmaHQ rule fdeebdf0-9f3f-4d08-84a6-4c4d13e39fe4, 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.