Sigma rule: Uncommon File Creation By Mysql Daemon Process

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-abc11fa36503, updated 2024-05-27T00:00:00.000Z.

Rule

Title
Uncommon File Creation By Mysql Daemon Process
Status
test
Level
high
Author
Joseph Kamau
Date
2024-05-27
File
rules/windows/file/file_event/file_event_win_mysqld_uncommon_file_creation.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the creation of files with scripting or executable extensions by Mysql daemon.
Which could be an indicator of "User Defined Functions" abuse to download malware.

Log source

product
windows
category
file_event

Detection

selection:
    Image|endswith:
        - \mysqld.exe
        - \mysqld-nt.exe
    TargetFilename|endswith:
        - '.bat'
        - '.dat'
        - '.dll'
        - '.exe'
        - '.ps1'
        - '.psm1'
        - '.vbe'
        - '.vbs'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth

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/file/file_event/file_event_win_mysqld_uncommon_file_creation.yml

Sources and licences

  • SigmaHQ

    "Uncommon File Creation By Mysql Daemon Process" by Joseph Kamau (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_mysqld_uncommon_file_creation.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: Uncommon File Creation By Mysql Daemon Process",
entity page, dataset version ref-abc11fa36503, updated 2024-05-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/c61daa90-3c1e-4f18-af62-8f288b5c9aaf (accessed 2026-11-03).
Underlying source: SigmaHQ rule c61daa90-3c1e-4f18-af62-8f288b5c9aaf, 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.