Sigma rule: Suspicious Named Error

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-fd2bfdf9c1a4, updated 2022-10-05T00:00:00.000Z.

Rule

Title
Suspicious Named Error
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2018-02-20
Modified
2022-10-05
File
rules/linux/builtin/syslog/lnx_syslog_susp_named.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects suspicious DNS error messages that indicate a fatal or suspicious error that could be caused by exploiting attempts

Log source

product
linux
service
syslog

Detection

keywords:
    - ' dropping source port zero packet from '
    - ' denied AXFR from '
    - ' exiting (due to fatal error)'
condition: keywords

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.t1190

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/linux/builtin/syslog/lnx_syslog_susp_named.yml

Sources and licences

  • SigmaHQ

    "Suspicious Named Error" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/builtin/syslog/lnx_syslog_susp_named.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 Named Error",
entity page, dataset version ref-fd2bfdf9c1a4, updated 2022-10-05T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/c8e35e96-19ce-4f16-aeb6-fd5588dc5365 (accessed 2026-11-03).
Underlying source: SigmaHQ rule c8e35e96-19ce-4f16-aeb6-fd5588dc5365, 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.