Trojan-PSW.Win32.Zombie.10

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It is a Trojan stealing the system passwords from victim machine and sending them by email. It is a PE EXE file compiled with Microsoft Visual C++ and packed with UPX packer. Executable has packed file size 61 530 bytes and 131 163 bytes unpacked.

Installation

This Trojan copies itself with the name systsrv.exe under the %System% folder. After the execution it changes the registry key to ensure that this file will be launched every time an exe file executed by the system.

[HKCR\exefile\shell\open\command]
"(Default)"="%system%\systsrv.exe "%1" %*"

Payload

The Trojan looks for the *.pwl files on the system. PWL files are the files where Windows (95/98/Me) saves the system and dialup passwords inside. Then Trojan sends the files to the preconfigured email.

Removal instructions

  1. Delete the executable file
    %system%\systsrv.exe
    
  2. Change the following registry key:
    [HKCR\exefile\shell\open\command]
    "(Default)"="%system%\systsrv.exe "%1" %*"
    

    With the key

    [HKCR\exefile\shell\open\command]
    "(Default)"=""%1" %*"
    
  3. Use Kaspersky Anti-Virus to delete the Trojan. Update your antivirus databases and perform a full scan of the computer (download a trial version).
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