Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022  
Original source:  
Threat: Backdoor.Win32.Guptachar.20  
Vulnerability: Insecure Credential Storage  
Description: The malware runs a web server on TCP port 2015 (default) and uses BASIC authentication. The credentials "hacker01:imchampgr8" get stored in a .NFO information file named "GPTCR.NFO" under Windows dir base64 encoded and hidden among many junk NULL bytes.  
Family: Guptachar  
Type: PE32  
MD5: 857999d2306f257b80d1b8f6a51ae8b0  
Vuln ID: MVID-2022-0631  
Dropped files: GPTCR2.exe   
Disclosure: 08/08/2022  
import base64  
Web URLs available on the infected host.  
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