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Detection rules › Sigma

Interactive AT Job

Status
test
Severity
high
Log source
product windows, category process_creation
Author
E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
Source
github.com/SigmaHQ/sigma

Detects an interactive AT job, which may be used as a form of privilege escalation.

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1053.002 Scheduled Task/Job: At
PersistenceT1053.002 Scheduled Task/Job: At
Privilege EscalationT1053.002 Scheduled Task/Job: At

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation
Security-AuditingEvent ID 4688A new process has been created.

Rule body yaml

title: Interactive AT Job
id: 60fc936d-2eb0-4543-8a13-911c750a1dfc
status: test
description: Detects an interactive AT job, which may be used as a form of privilege escalation.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.002/T1053.002.md
    - https://eqllib.readthedocs.io/en/latest/analytics/d8db43cf-ed52-4f5c-9fb3-c9a4b95a0b56.html
author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
date: 2019-10-24
modified: 2021-11-27
tags:
    - attack.persistence
    - attack.execution
    - attack.privilege-escalation
    - attack.t1053.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\at.exe'
        CommandLine|contains: 'interactive'
    condition: selection
falsepositives:
    - Unlikely (at.exe deprecated as of Windows 8)
level: high
simulation:
    - type: atomic-red-team
      name: At.exe Scheduled task
      technique: T1053.002
      atomic_guid: 4a6c0dc4-0f2a-4203-9298-a5a9bdc21ed8

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '\at.exe'
    CommandLine|contains: 'interactive'

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
  • interactive corpus 3 (sigma 3)
Imageends_with
  • \at.exe corpus 2 (sigma 2)