Detection rules › Sigma

Suspicious Tasklist Discovery Command

Status
test
Severity
informational
Log source
category process_creation, product windows
Author
frack113
Source
github.com/SigmaHQ/sigma

Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common software/applications running on systems within the network

Known false positives

  • Likely from users, administrator and different internal and third party applications.

MITRE ATT&CK coverage

TacticTechniques
Discovery

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation

Rule body

title: Suspicious Tasklist Discovery Command
id: 63332011-f057-496c-ad8d-d2b6afb27f96
status: test
description: Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common software/applications running on systems within the network
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1057/T1057.md#atomic-test-2---process-discovery---tasklist
author: frack113
date: 2021-12-11
modified: 2022-12-25
tags:
    - attack.discovery
    - attack.t1057
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - CommandLine|contains: 'tasklist'
        - Image|endswith: '\tasklist.exe'
        - OriginalFileName: 'tasklist.exe'
    condition: selection
falsepositives:
    - Likely from users, administrator and different internal and third party applications.
level: informational

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    - CommandLine|contains: 'tasklist'
    - Image|endswith: '\tasklist.exe'
    - OriginalFileName: 'tasklist.exe'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • tasklist corpus 5 (sigma 5)
field:"CommandLine" kind:match value:"tasklist"
Imageends_with
  • \tasklist.exe corpus 5 (sigma 5)
field:"Image" kind:ends_with value:"\tasklist.exe"
OriginalFileNameeq
  • tasklist.exe corpus 4 (sigma 3, elastic 1)
field:"OriginalFileName" kind:eq value:"tasklist.exe"