Sigma rule: Default Credentials Usage

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-971bd908e259, updated 2025-11-01T00:00:00.000Z.

Rule

Title
Default Credentials Usage
Status
experimental
Level
medium
Author
Alexandr Yampolskyi, SOC Prime
Date
2019-03-26
Modified
2025-11-01
File
rules-compliance/product/qualys/qualys_default_credentials_usage.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Before deploying any new asset, change all default passwords to have values consistent with administrative level accounts.
Sigma detects default credentials usage. Sigma for Qualys vulnerability scanner. Scan type - Vulnerability Management.

Log source

product
qualys

Detection

selection:
    host.scan.vuln:
        - 10693
        - 11507
        - 11633
        - 11804
        - 11821
        - 11847
        - 11867
        - 11931
        - 11935
        - 11950
        - 12541
        - 12558
        - 12559
        - 12560
        - 12562
        - 12563
        - 12565
        - 12587
        - 12590
        - 12599
        - 12702
        - 12705
        - 12706
        - 12907
        - 12928
        - 12929
        - 13053
        - 13178
        - 13200
        - 13218
        - 13241
        - 13253
        - 13274
        - 13296
        - 13301
        - 13327
        - 13373
        - 13374
        - 13409
        - 13530
        - 13532
        - 20065
        - 20073
        - 20081
        - 27202
        - 27358
        - 38702
        - 38719
        - 42045
        - 42417
        - 43029
        - 43220
        - 43221
        - 43222
        - 43223
        - 43225
        - 43246
        - 43431
        - 43484
        - 86857
        - 87098
        - 87106
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access

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-compliance/product/qualys/qualys_default_credentials_usage.yml

Sources and licences

  • SigmaHQ

    "Default Credentials Usage" by Alexandr Yampolskyi, SOC Prime (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-compliance/product/qualys/qualys_default_credentials_usage.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: Default Credentials Usage",
entity page, dataset version ref-971bd908e259, updated 2025-11-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/1a395cbc-a84a-463a-9086-ed8a70e573c7 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 1a395cbc-a84a-463a-9086-ed8a70e573c7, 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.