Detection rules › Sigma

Delete All Scheduled Tasks

Severity
high
Author
Nasreddine Bencherchali (Nextron Systems)
Source
upstream

Detects the usage of schtasks with the delete flag and the asterisk symbol to delete all tasks from the schedule of the local computer, including tasks scheduled by other users.

MITRE ATT&CK coverage

TacticTechniques
ImpactT1489 Service Stop

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation
Security-Auditing4688A new process has been created.

Stages and Predicates

Stage 1: selection

CommandLine|contains: ' /delete '
CommandLine|contains: ' /f'
CommandLine|contains: '/tn \*'
Image|endswith: '\schtasks.exe'

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
  • /delete corpus 2 (sigma 2)
  • /f corpus 2 (sigma 2)
  • /tn \*
Imageends_with
  • \schtasks.exe corpus 45 (sigma 45)