Detection rules › Sigma

Access To ADMIN$ Network Share

Severity
low
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects access to ADMIN$ network share

MITRE ATT&CK coverage

TacticTechniques
Lateral MovementT1021.002 Remote Services: SMB/Windows Admin Shares

Event coverage

ProviderEvent IDTitle
Security-Auditing5140A network share object was accessed.

Stages and Predicates

Stage 1: selection

ShareName: 'Admin$'

Stage 2: not 1 of filter_main_computer_account

SubjectUserName|endswith: '$'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
ShareNameeq
  • Admin$
SubjectUserNameends_with
  • $ corpus 18 (sigma 14, elastic 4)