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Trojan-Downloader.Win32.IstBar

Detect Date 06/25/2005
Class Trojan-Downloader
Platform Win32
Description

This is a generic detection for a family of Trojan downloaders. These malicious programs will download a range of other malicious programs from the Internet to the victim machine.

Programs from this family may create the following registry values:

[HKLMSOFTWAREDR_S]



[HKCUSOFTWAREDR_S]



[HKLMSOFTWAREClassesdrs.nuID]



[HKCUSOFTWAREClassesdrs.nuID]

All programs in this family have an identical way of getting URLs from where they will download additional malicious programs. Every 30 minutes a program from this family will download a file from, for instance, http://www.adzhooter.com/DR_S/gSD.html. This file contains addresses which direct the Trojan to other sites where it can download additional malicious programs:

|5|20050406|

ts|http://www.adzhooter.com/DR_S/bp/as_8_new.exe|1|bs_8_new.exe|1.0|1|

adsh|http://www.adzhooter.com/DR_S/bp/afita.exe|2|afita.exe|1.2|1|

sfitb|http://www.adzhooter.com/DR_S/bp/SYSsfita.dll|3|SYSsfita.dll|1.0|2

sfitb||

ezu|http://www.adzhooter.com/DR_S/bp/wzStub.exe|3|wzStub.exe|1.0|1|

sfisb|http://www.adzhooter.com/DR_S/bp/ReplaceSearch.dll|3|ReplaceSearch

sfisb|.dll|1.0|2|

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