Detection rules › Sigma

Sensitive File Recovery From Backup Via Wbadmin.EXE

Severity
high
Author
Nasreddine Bencherchali (Nextron Systems), frack113
Source
upstream

Detects the dump of highly sensitive files such as "NTDS.DIT" and "SECURITY" hive. Attackers can leverage the "wbadmin" utility in order to dump sensitive files that might contain credential or sensitive information.

MITRE ATT&CK coverage

TacticTechniques
Credential AccessT1003.003 OS Credential Dumping: NTDS

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: all of selection_img

or:
Image|endswith: '\wbadmin.exe'
OriginalFileName: WBADMIN.EXE

Stage 2: all of selection_backup

or:
CommandLine|contains: '\Windows\NTDS\NTDS.dit'
CommandLine|contains: '\config\SAM'
CommandLine|contains: '\config\SECURITY'
CommandLine|contains: '\config\SYSTEM'
CommandLine|contains: ' recovery'
CommandLine|contains: 'itemtype:File'
CommandLine|contains: recoveryTarget

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
CommandLinematch
  • recovery corpus 2 (sigma 2)
  • \Windows\NTDS\NTDS.dit corpus 2 (sigma 2)
  • \config\SAM corpus 2 (sigma 2)
  • \config\SECURITY corpus 2 (sigma 2)
  • \config\SYSTEM corpus 2 (sigma 2)
  • itemtype:File corpus 2 (sigma 2)
  • recoveryTarget corpus 2 (sigma 2)
Imageends_with
  • \wbadmin.exe corpus 6 (sigma 6)
OriginalFileNameeq
  • WBADMIN.EXE corpus 6 (sigma 6)