Discovery / credits: Malvuln - (c) 2021  
Original source:  
Threat: Backdoor.Win32.Wollf.c  
Vulnerability: Hardcoded Backdoor Password  
Description: The backdoor creates a service "sysocm.exe" running with SYSTEM integrity. The sysocm service listens for commands on TCP port 7754. The backdoors remote logon password is "mDVs3TAv8sByKyG6YgwbtYQK6fSQeauz" and while strong, its stored in the executable and easily discovered using strings utility.  
C:\>sc qc sysocm  
[SC] QueryServiceConfig SUCCESS  
SERVICE_NAME: sysocm  
TYPE : 120 WIN32_SHARE_PROCESS (interactive)  
BINARY_PATH_NAME : C:\WINDOWS\system32\sysocm.exe -start  
TAG : 0  
DISPLAY_NAME : sysocm  
Type: PE32  
MD5: 91c02a95839a76a5d2e335cded7112a9  
Vuln ID: MVID-2021-0053  
Dropped files: sysocm.exe  
Disclosure: 01/25/2021  
login: mDVs3TAv8sByKyG6YgwbtYQK6fSQeauz  
Login succeed!  
"Wollf Remote Manager" v1.6   
Code by wollf,  
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.   
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) (TM).