PUA - Advanced Port Scanner Execution

Status: test
Severity: medium
Log source: category process_creation, product windows
Author: Nasreddine Bencherchali (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects the use of Advanced Port Scanner.

Known false positives

Legitimate administrative use
Tools with similar commandline (very rare)

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1046` Network Service Discovery `T1135` Network Share Discovery

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation

Rule body

title: PUA - Advanced Port Scanner Execution
id: 54773c5f-f1cc-4703-9126-2f797d96a69d
status: test
description: Detects the use of Advanced Port Scanner.
references:
    - https://github.com/3CORESec/MAL-CL/tree/master/Descriptors/Other/Advanced%20Port%20Scanner
author: Nasreddine Bencherchali (Nextron Systems)
date: 2021-12-18
modified: 2023-02-07
tags:
    - attack.discovery
    - attack.t1046
    - attack.t1135
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|contains: '\advanced_port_scanner'
        - OriginalFileName|contains: 'advanced_port_scanner' # Covers also advanced_port_scanner_console.exe
        - Description|contains: 'Advanced Port Scanner'
    selection_cli:
        CommandLine|contains|all:
            - '/portable'
            - '/lng'
    condition: 1 of selection_*
falsepositives:
    - Legitimate administrative use
    - Tools with similar commandline (very rare)
level: medium
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_pua_advanced_port_scanner/info.yml

Stages and Predicates

Stage 0: `condition`

1 of selection_*

Stage 1: `selection_img`

selection_img:
    - Image|contains: '\advanced_port_scanner'
    - OriginalFileName|contains: 'advanced_port_scanner'
    - Description|contains: 'Advanced Port Scanner'

Stage 2: `selection_cli`

selection_cli:
    CommandLine|contains|all:
        - '/portable'
        - '/lng'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`/lng` corpus 2 (sigma 2) `/portable` corpus 2 (sigma 2)	`field:"CommandLine" kind:match`
`Description`	match	`Advanced Port Scanner`	`field:"Description" kind:match value:"Advanced Port Scanner"`
`Image`	match	`\advanced_port_scanner`	`field:"Image" kind:match value:"\advanced_port_scanner"`
`OriginalFileName`	match	`advanced_port_scanner`	`field:"OriginalFileName" kind:match value:"advanced_port_scanner"`

PUA - Advanced Port Scanner Execution

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection_img

Stage 2: selection_cli

Indicators

Stage 0: `condition`

Stage 1: `selection_img`

Stage 2: `selection_cli`