[virusinfo] Troj/Zapchas-K
- From: "Mike" <mikebike@xxxxxxxxx>
- To: virusinfo@xxxxxxxxxxxxx
- Date: Mon, 13 Jun 2005 15:18:57 -0700
From; Sophos Alert System:
Name: Troj/Zapchas-K
Aliases: IRC/Flood.mirc, Backdoor.Win32.mIRC-based
Type: Trojan
Date: 13 June 2005
Sophos has issued protection for Troj/Zapchas-K.
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/Zapchas-K can be found at:
http://www.sophos.com/virusinfo/analyses/trojzapchask.html
Troj/Zapchas-K is a backdoor Trojan which allows a remote intruder to gain
access and control over the computer via IRC channels.
Troj/Zapchas-K typically arrives via IRC channels as a DCC Send with the
filename postcard.gif.exe.
The backdoor includes functions that allow a remote intruder to upload and
download files, run programs and steal CD keys.
When the Trojan is installed the following component files, detected as
Troj/Zapchas-K, are created in the C:\Windows\System folder:
svchost.exe
script.ini
The Troj/Zapchas-K also creates the following files which may be safely deleted
after the Trojan has been removed:
mirc.ini
msg.txt
nicks.txt
pri.txt
remote.ini
serv.txt
servers.ini
sup.bat
sup.reg
username.txt
The following registry entry is created to run svchost.exe on when a user makes
outbound connections using the IRC protocol:
HKLM\SOFTWARE\CLASSES\irc\Shell\open\command
@
"C:\Windows\System\svchost.exe" -noconnect
Troj/Zapchas-K may also set the following registry entry in order to run each
time a user logs on:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
GNP Generic Host Process
"C:\Windows\system\svchost.exe"
The Troj/Zapchas-K virus identity file (IDE) includes detection for:
Troj/RuinDl-A
http://www.sophos.com/virusinfo/analyses/trojruindla.html
Troj/Psyme-BX
http://www.sophos.com/virusinfo/analyses/trojpsymebx.html
Troj/Hogil-C
http://www.sophos.com/virusinfo/analyses/trojhogilc.html
Troj/Hogdown-A
http://www.sophos.com/virusinfo/analyses/trojhogdowna.html
W32/Mytob-EP
http://www.sophos.com/virusinfo/analyses/w32mytobep.html
W32//Rbot-AFZ
http://www.sophos.com/virusinfo/analyses/w32rbotafz.html
Troj/Dloader-OR
http://www.sophos.com/virusinfo/analyses/trojdloaderor.html
Troj/Dloader-OS
http://www.sophos.com/virusinfo/analyses/trojdloaderos.html
Dial/Platform-D
http://www.sophos.com/virusinfo/analyses/dialplatformd.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/Zapchas-K from:
http://www.sophos.com/downloads/ide/zapcha-k.ide
Read about how to use IDE files at
http://www.sophos.com/support/knowledgebase/article/363.html
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