detection.wiki

Detection rules › Sigma

Net.EXE Execution

Status
test
Severity
low
Log source
product windows, category process_creation
Author
Michael Haag, Mark Woan (improvements), James Pemberton / @4A616D6573 / oscd.community (improvements)
Source
github.com/SigmaHQ/sigma

Detects execution of "Net.EXE".

MITRE ATT&CK coverage

TacticTechniques
DiscoveryT1007 System Service Discovery, T1018 Remote System Discovery, T1049 System Network Connections Discovery, T1069.001 Permission Groups Discovery: Local Groups, T1069.002 Permission Groups Discovery: Domain Groups, T1087.001 Account Discovery: Local Account, T1087.002 Account Discovery: Domain Account, T1135 Network Share Discovery, T1201 Password Policy Discovery
Lateral MovementT1021.002 Remote Services: SMB/Windows Admin Shares

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation

Rule body yaml

title: Net.EXE Execution
id: 183e7ea8-ac4b-4c23-9aec-b3dac4e401ac
status: test
description: Detects execution of "Net.EXE".
references:
    - https://pentest.blog/windows-privilege-escalation-methods-for-pentesters/
    - https://eqllib.readthedocs.io/en/latest/analytics/4d2e7fc1-af0b-4915-89aa-03d25ba7805e.html
    - https://eqllib.readthedocs.io/en/latest/analytics/e61f557c-a9d0-4c25-ab5b-bbc46bb24deb.html
    - https://eqllib.readthedocs.io/en/latest/analytics/9b3dd402-891c-4c4d-a662-28947168ce61.html
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1007/T1007.md#atomic-test-2---system-service-discovery---netexe
author: Michael Haag, Mark Woan (improvements), James Pemberton / @4A616D6573 / oscd.community (improvements)
date: 2019-01-16
modified: 2022-07-11
tags:
    - attack.discovery
    - attack.t1007
    - attack.t1049
    - attack.t1018
    - attack.t1135
    - attack.t1201
    - attack.t1069.001
    - attack.t1069.002
    - attack.t1087.001
    - attack.t1087.002
    - attack.lateral-movement
    - attack.t1021.002
    - attack.s0039
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\net.exe'
              - '\net1.exe'
        - OriginalFileName:
              - 'net.exe'
              - 'net1.exe'
    selection_cli:
        CommandLine|contains:
            - ' accounts'
            - ' group'
            - ' localgroup'
            - ' share'
            - ' start'
            - ' stop '
            - ' user'
            - ' view'
    condition: all of selection_*
falsepositives:
    - Likely
level: low

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_img

selection_img:
    - Image|endswith:
          - '\net.exe'
          - '\net1.exe'
    - OriginalFileName:
          - 'net.exe'
          - 'net1.exe'

Stage 2: selection_cli

selection_cli:
    CommandLine|contains:
        - ' accounts'
        - ' group'
        - ' localgroup'
        - ' share'
        - ' start'
        - ' stop '
        - ' user'
        - ' view'

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
  • accounts
  • group corpus 2 (sigma 2)
  • localgroup
  • share
  • start corpus 2 (sigma 1, splunk 1)
  • stop corpus 8 (sigma 6, splunk 2)
  • user corpus 2 (sigma 1, splunk 1)
  • view corpus 2 (sigma 2)
Imageends_with
  • \net.exe corpus 49 (sigma 49)
  • \net1.exe corpus 47 (sigma 47)
OriginalFileNameeq
  • net.exe corpus 28 (sigma 19, elastic 7, splunk 2)
  • net1.exe corpus 44 (sigma 19, splunk 19, elastic 6)