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F-Secure Malware Information Pages: Breplibot.AE
[Summary] | [Detailed Description] | [Detection]

Name : Breplibot.AE
Alias:Ryknos, Stinx-F
Type:Backdoor
Category:Malware
Platform:Win32
Radar Alert
Radar Level 2
Level 2

Summary
Breplibot.AE is a backdoor with bot capabilities. It connects to several IRC servers and waits for commands from the backdoor author.
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Detailed Description
System installation

The backdoor's file is a PE executable about 30 kilobytes long, packed with UPX file compressor.

When the backdoor's file is started, it copies itself as 'svcsvh32.exe' file to Windows System folder and then tries to create the following startup key values in the Registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
"WindowsDiskE" = "svcsvh32.exe"

Bot functionality

When the backdoor is active, it connects to an IRC server, and joins a certain channel then acts as a bot there.

The following IRC servers and ports are used by the backdoor:

  • 152.7.4.74:8080
  • 161.6.23.28:8080
  • 170.140.216.236:8080
  • 170.140.240.82:8080
  • 128.119.60.144:8080

The backdoor joins the following password-protected IRC channel:

#info

A hacker can send commands to the bots to control infected computers. Several tasks can be performed, including the following:

  • - Download and execute files from remote servers
  • - Request system information
  • - Delete files

Payload

Breplibot.AE tries to terminate several security-related processes.
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Detection

F-Secure Anti-Virus detects this malware with the following updates:

[FSAV_Database_Version]

Version = 2006-02-01_02.
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F-Secure Corporation

Last Modified: February 01, 2006