Sigma rule: Potentially Suspicious Malware Callback Communication - Linux
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-5f1fc74620d9, updated 2024-05-10T00:00:00.000Z.
Rule
- Title
- Potentially Suspicious Malware Callback Communication - Linux
- Status
- test
- Level
- high
- Author
- hasselj
- Date
- 2024-05-10
- File
- rules/linux/network_connection/net_connection_lnx_susp_malware_callback_port.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects programs that connect to known malware callback ports based on threat intelligence reports.
Log source
- product
- linux
- category
- network_connection
Detection
selection:
Initiated: 'true'
DestinationPort:
- 888
- 999
- 2200
- 2222
- 4000
- 4444
- 6789
- 8531
- 50501
- 51820
filter_main_local_ranges:
DestinationIp|cidr:
- '127.0.0.0/8'
- '10.0.0.0/8'
- '172.16.0.0/12'
- '192.168.0.0/16'
- '169.254.0.0/16'
- '::1/128' # IPv6 loopback
- 'fe80::/10' # IPv6 link-local addresses
- 'fc00::/7' # IPv6 private addresses
condition: selection and not 1 of filter_main_*False positives (as the rule lists them)
- Unknown
Tags
- attack.persistence
- attack.command-and-control
- attack.t1571
MITRE ATT&CK ids this rule names
Related rules
References
- https://www.mandiant.com/resources/blog/triton-actor-ttp-profile-custom-attack-tools-detections
- https://www.mandiant.com/resources/blog/ukraine-and-sandworm-team
- https://www.elastic.co/guide/en/security/current/potential-non-standard-port-ssh-connection.html
- https://thehackernews.com/2024/01/systembc-malwares-c2-server-analysis.html
- https://www.cybereason.com/blog/sliver-c2-leveraged-by-many-threat-actors
Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/network_connection/net_connection_lnx_susp_malware_callback_port.yml
Sources and licences
SigmaHQ
"Potentially Suspicious Malware Callback Communication - Linux" by hasselj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/network_connection/net_connection_lnx_susp_malware_callback_port.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: Potentially Suspicious Malware Callback Communication - Linux",
entity page, dataset version ref-5f1fc74620d9, updated 2024-05-10T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/dbfc7c98-04ab-4ab7-aa94-c74d22aa7376 (accessed 2026-11-03).
Underlying source: SigmaHQ rule dbfc7c98-04ab-4ab7-aa94-c74d22aa7376, 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.