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Date: Mon, 8 Aug 2022 20:58:54 -0400
From: malvuln <>
Subject: [FD] Backdoor.Win32.Guptachar.20 / Insecure Credential Storage

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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