Suspicious PrinterPorts Creation (CVE-2020-1048)

Status: test
Severity: high
Log source: category process_creation, product windows
Author: EagleEye Team, Florian Roth
Source: github.com/SigmaHQ/sigma

Detects new commands that add new printer port which point to suspicious file

Known false positives

New printer port install on host

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.001` Command and Scripting Interpreter: PowerShell

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: Suspicious PrinterPorts Creation (CVE-2020-1048)
id: cc08d590-8b90-413a-aff6-31d1a99678d7
status: test
description: Detects new commands that add new printer port which point to suspicious file
references:
    - https://windows-internals.com/printdemon-cve-2020-1048/
author: EagleEye Team, Florian Roth
date: 2020-05-13
modified: 2021-11-27
tags:
    - attack.persistence
    - attack.execution
    - attack.t1059.001
    - cve.2020-1048
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection1:
        CommandLine|contains: 'Add-PrinterPort -Name'
    selection2:
        CommandLine|contains:
            - '.exe'
            - '.dll'
            - '.bat'
    selection3:
        CommandLine|contains: 'Generic / Text Only'
    condition: (selection1 and selection2) or selection3
falsepositives:
    - New printer port install on host
level: high

Stages and Predicates

Stage 0: `condition`

(selection1 and selection2) or selection3

Stage 1: `selection1`

selection1:
    CommandLine|contains: 'Add-PrinterPort -Name'

Stage 2: `selection2`

selection2:
    CommandLine|contains:
        - '.exe'
        - '.dll'
        - '.bat'

Stage 3: `selection3`

selection3:
    CommandLine|contains: 'Generic / Text Only'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`.bat` corpus 11 (sigma 9, elastic 1, kusto 1) `.dll` corpus 16 (sigma 16) `.exe` corpus 5 (sigma 5) `Add-PrinterPort -Name` `Generic / Text Only`	`field:"CommandLine" kind:match`

Suspicious PrinterPorts Creation (CVE-2020-1048)

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection1

Stage 2: selection2

Stage 3: selection3

Indicators

Stage 0: `condition`

Stage 1: `selection1`

Stage 2: `selection2`

Stage 3: `selection3`