Threat description



Cabrotor is backdoor, allowing an attacker to control the machine where it runs. The trojan itself is a Windows PE EXE file written in Delphi.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

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Technical Details

The original trojan package contains three main executable files:

CaBrONaToR.exe - client to send commands to remote server  CaBrONeDiT.exe - server editor to modify default server settings  8======D.exe - server (trojan itself)   

When run, the backdoor code copies itself to the Windows directory and registers itself in the system registry in the auto-run section. In different backdoor versions the backdoor EXE name and registry keys are different. The known variant has:

Executable name:


The registry key entries it creates are located in:

[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]  [HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices]   

And their names are:


The trojan then opens a connection to its master's IRC channel and waits for its master's commands.

The backdoor allows the attacker to invoke any of the following commands:

Reports computer information (Windows version, CPU type, UserName, CompanyName)  Open/closes CD drive  Reports directories and file names  Runs a local file or command  Send information: RAS, MS Messenger and .NET services  Exits Windows  Downloads a requested file  Performs DoS attack to a requested victim address  Terminates itself   

Detection for Cabrotor worm is available in the following FSAV updates:

Detection Type: PC

Database: 2002-07-22_01

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