Sigma rule: Access To ADMIN$ Network Share

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-7cc8a3959c1a, updated 2024-01-16T00:00:00.000Z.

Rule

Title
Access To ADMIN$ Network Share
Status
test
Level
low
Author
Florian Roth (Nextron Systems)
Date
2017-03-04
Modified
2024-01-16
File
rules/windows/builtin/security/win_security_admin_share_access.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects access to ADMIN$ network share

Log source

product
windows
service
security
definition
Requirements: The advanced audit policy setting "Object Access > Audit File Share" must be configured for Success/Failure

Detection

selection:
    EventID: 5140
    ShareName: 'Admin$'
filter_main_computer_account:
    SubjectUserName|endswith: '$'
condition: selection and not 1 of filter_*

False positives (as the rule lists them)

  • Legitimate administrative activity

Tags

  • attack.lateral-movement
  • attack.t1021.002

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/builtin/security/win_security_admin_share_access.yml

Sources and licences

  • SigmaHQ

    "Access To ADMIN$ Network Share" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/win_security_admin_share_access.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: Access To ADMIN$ Network Share",
entity page, dataset version ref-7cc8a3959c1a, updated 2024-01-16T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/098d7118-55bc-4912-a836-dc6483a8d150 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 098d7118-55bc-4912-a836-dc6483a8d150, 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.