[virusinfo] Troj/Insor-B

  • From: "Mike" <mikebike@xxxxxxxxx>
  • To: virusinfo@xxxxxxxxxxxxx
  • Date: Tue, 28 Jun 2005 08:27:49 -0700

From; Sophos Alert System:

Name: Troj/Insor-B
Aliases: Trojan-Dropper.Win32.Small.aay, Downloader-ACG
Type: Trojan
Date: 28 June 2005

Sophos has issued protection for Troj/Insor-B.

At the time of writing, Sophos has received a small number of
reports of this Trojan from the wild.

Customers using EM Library, Enterprise Console, PureMessage or
any of our Sophos small business solutions will be automatically
protected at their next scheduled update.


Information about Troj/Insor-B can be found at:
http://www.sophos.com/virusinfo/analyses/trojinsorb.html

Troj/Insor-B is a downloader and proxy Trojan. 
When run the Trojan drops iedld32.dll into the Windows system folder and loads 
it. 
When there is an active internet connection Troj/Insor-B notifies a remote 
server that it is active and waits for a command. 
Troj/Insor-B can be given a command to download and run an executable or 
provide a proxy connection on a random port. 
Troj/Insor-B will create the following registry entries so as to auto-load: 
HKCR\CLSID\(114C670C-C510-4F49-B431-4B812F50BA7B)\InprocServer32
(default)
"<System>\iedld32.dll"

The Troj/Insor-B virus identity file (IDE) includes detection for:


Troj/Yaler-B
http://www.sophos.com/virusinfo/analyses/trojyalerb.html
Troj/Dluca-S
http://www.sophos.com/virusinfo/analyses/trojdlucas.html
W32/Combra-B
http://www.sophos.com/virusinfo/analyses/w32combrab.html
Troj/Bancban-DJ
http://www.sophos.com/virusinfo/analyses/trojbancbandj.html
Troj/Bancban-DI
http://www.sophos.com/virusinfo/analyses/trojbancbandi.html

Customers with 3.xx or lower versions of Sophos Anti-Virus, 
who are not running EM Library, can manually download the IDE
for Troj/Insor-B from:

http://www.sophos.com/downloads/ide/insor-b.ide

Read about how to use IDE files at
http://www.sophos.com/support/knowledgebase/article/363.html

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