[virusinfo] Sophos Anti-Virus IDE alert: Troj/Legmir-K
- From: "Mike" <mikebike@xxxxxxxxx>
- To: virusinfo@xxxxxxxxxxxxx
- Date: Thu, 22 Apr 2004 09:16:10 -0700
From; Sophos Alert System:
Name: Troj/Legmir-K
Type: Trojan
Date: 22 April 2004
A virus identity (IDE) file which provides protection is
available now from the Sophos website, and will be incorporated
into the June 2004 (3.82) release of Sophos Anti-Virus.
Customers using Enterprise Manager, PureMessage and any
of the Sophos small business solutions will be automatically
protected at their next scheduled update.
At the time of writing, Sophos has received just one report of
this Trojan from the wild.
Information about Troj/Legmir-K can be found at:
http://www.sophos.com/virusinfo/analyses/trojlegmirk.html
Description
Troj/LegMir-K is a password-stealing Trojan.
In order to run automatically when Windows starts up the Trojan copies
itself to the file intrenat.exe in the Windows folder and adds the following
registry entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Intrenat = C:\WINDOWS\intrenat.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Intrenat = C:\WINDOWS\intrenat.exe
Troj/LegMir-K also creates the file exp1orer.dll in the Windows folder. This
file is already detected as Troj/LegMir-E.
To avoid detection, Troj/LegMir-K attempts to terminate the following
processes:
EGHOST.EXE
MAILMON.EXE
KAVPFW.EXE
RAVTIMER.EXE
RAVMON.EXE
CCENTER.EXE
NAVAPW32.EXE
Troj/LegMir-K stores stolen passwords in the HKCR section of the registry
and sends them to the author via email. The destination email address and
the exact location in the registry can both be configured by the author.
Recovery
Please follow the instructions for removing Trojans.
Change any passwords that may have become compromised.
You will also need to edit the following registry entries, if they are
present. Please read the warning about editing the registry.
At the taskbar, click Start|Run. Type 'Regedit' and press Return. The
registry editor opens.
Before you edit the registry, you should make a backup. On the 'Registry'
menu, click 'Export Registry File'. In the 'Export range' panel, click
'All', then save your registry as Backup.
Locate the HKEY_LOCAL_MACHINE entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Intrenat = C:\WINDOWS\intrenat.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Intrenat = C:\WINDOWS\intrenat.exe
and delete them if they exist.
Close the registry editor.
This IDE file also includes detection for:
W32/Agobot-LO
http://www.sophos.com/virusinfo/analyses/w32agobotlo.html
W32/Sdbot-HO
http://www.sophos.com/virusinfo/analyses/w32sdbotho.html
Troj/Padodor-A
http://www.sophos.com/virusinfo/analyses/trojpadodora.html
W32/Agobot-GL
http://www.sophos.com/virusinfo/analyses/w32agobotgl.html
Troj/Agent-AA
http://www.sophos.com/virusinfo/analyses/trojagentaa.html
W32/Agobot-GN
http://www.sophos.com/virusinfo/analyses/w32agobotgn.html
W32/Agobot-KR
http://www.sophos.com/virusinfo/analyses/w32agobotkr.html
W32/Rbot-F
http://www.sophos.com/virusinfo/analyses/w32rbotf.html
W32/Sdbot-HP
http://www.sophos.com/virusinfo/analyses/w32sdbothp.html
Troj/Banker-R
http://www.sophos.com/virusinfo/analyses/trojbankerr.html
Download the IDE file from:
http://www.sophos.com/downloads/ide/legmir-k.ide
Download all the IDE files available for the current version of
Sophos Anti-Virus in a single compressed file. The file is
available in two formats:
Zip file:
http://www.sophos.com/downloads/ide/ides.zip
Self-extracting file:
http://www.sophos.com/downloads/ide/ides.exe
Read about how to use IDE files at
http://www.sophos.com/downloads/ide/using.html
---------------------------------------------------------------------
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