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Trojan.Downloader.JS.Agent.ON

MEDIUM

vries

(Trojan.Js.Downloader.BDS)

Symptoms

Presence of a file in "C:\" named "win[4 random letters].exe"

Removal instructions:

Please let BitDefender disinfect your files.

Analyzed By

Cristian Lungu, virus researcher

Technical Description:

Using an exploit on Internet Explorer with ActiveX Objects and a list of vulnerable CLSID that belong to the system it downloads malware and executes it on your computer.

The CLSID that the malware uses are :

{BD96C556-65A3-11D0-983A-00C04FC29E30}
{BD96C556-65A3-11D0-983A-00C04FC29E36}
{AB9BCEDD-EC7E-47E1-9322-D4A210617116}
{0006F033-0000-0000-C000-000000000046}
{0006F03A-0000-0000-C000-000000000046}
{6e32070a-766d-4ee6-879c-dc1fa91d2fc3}
{6414512B-B978-451D-A0D8-FCFDF33E833C}
{7F5B7F63-F06F-4331-8A26-339E03C0AE3D}
{06723E09-F4C2-43c8-8358-09FCD1DB0766}
{639F725F-1B2D-4831-A9FD-874847682010}
{BA018599-1DB3-44f9-83B4-461454C84BF8}
{D0C07D56-7C69-43F1-B4A0-25F5A11FAB19}
{E8CCCDDF-CA28-496b-B050-6C07C962476B}

The malware link is from the following web location:

http://upt[hidden]jaf

It downloads the infected file into the root directory "C:\" with this name :

"win[4 random letters].exe"