What is Trojan Agent.bxx?

Type: Virus
Category: Trojans and viruses
Discovered: 10 August 2007
Removal tools: Malwarebytes' Anti-Malware, Spyware Doctor

1. Introduction

Trojan Agent.bxx can be silently downloaded browsing suspicious websites. It intrudes computer under vtr???.dll filename where ??? corresponds to any 3 numbers (particular file list can be found below). Trojan Agent.bxx is related to Browser Helper Object.
Also known as Trojan-Downloader.Win32.Agent.bxx.

2. Trojan Agent.bxx removal tools:

Malwarebytes' Anti-Malware (for the installation guide click here)
Spyware Doctor (for the installation guide click here)

3. Trojan Agent.bxx files:

atzrdada.dll, vtr129.dll, vtr133.dll, vtr135.dll, vtr138.dll, vtr145.dll, vtr159.dll, vtr161.dll, vtr167.dll, vtr212.dll, vtr218.dll, vtr220.dll, vtr221.dll, vtr230.dll, vtr323.dll, vtr326.dll, vtr345.dll, vtr347.dll, vtr348.dll, vtr357.dll, vtr372.dll, vtr375.dll, vtr382.dll, vtr397.dll, vtr412.dll, vtr434.dll, vtr441.dll, vtr455.dll, vtr473.dll, vtroll.dll

4. Hijackthis entries:

O2 - BHO: IEHlprObj Class - {ABCDECF0-4B15-11D1-ABED-709549C10000} - C:\WINDOWS\System32\atzrdada.dll O2 - BHO: IEHlprObj Class - {ABCDECF0-4B15-11D1-ABED-709549C10000} - C:\WINDOWS\system32\vtroll.dll O2 - BHO: IEHlprObj Class - {ABCDECF0-4B15-11D1-ABED-709549C10000} - C:\WINDOWS\system32\vtr???.dll (??? replaced with numbers)