HackTool - WinRM Access Via Evil-WinRM

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

Adversaries may use Valid Accounts to log into a computer using the Remote Desktop Protocol (RDP). The adversary may then perform actions as the logged-on user.

MITRE ATT&CK coverage

Tactic	Techniques
Lateral Movement	`T1021.006` Remote Services: Windows Remote Management

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: HackTool - WinRM Access Via Evil-WinRM
id: a197e378-d31b-41c0-9635-cfdf1c1bb423
status: test
description: Adversaries may use Valid Accounts to log into a computer using the Remote Desktop Protocol (RDP). The adversary may then perform actions as the logged-on user.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1021.006/T1021.006.md#atomic-test-3---winrm-access-with-evil-winrm
    - https://github.com/Hackplayers/evil-winrm
author: frack113
date: 2022-01-07
modified: 2023-02-13
tags:
    - attack.lateral-movement
    - attack.t1021.006
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\ruby.exe'
        CommandLine|contains|all:
            - '-i '
            - '-u '
            - '-p '
    condition: selection
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|endswith: '\ruby.exe'
    CommandLine|contains|all:
        - '-i '
        - '-u '
        - '-p '

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`-i` corpus 2 (sigma 2) `-p` corpus 2 (sigma 2) `-u` corpus 5 (sigma 4, splunk 1)	`field:"CommandLine" kind:match`
`Image`	ends_with	`\ruby.exe` corpus 2 (sigma 2)	`field:"Image" kind:ends_with value:"\ruby.exe"`