F-Secure Virus Descriptions : Korgo.A
[Summary] | [Detailed Description] | [Detection]
Korgo (aka Padobot) is a network worm written by the Russian
Hangup Team virus group. It spreads throughout the Internet using
a vulnerability in Microsoft Windows LSASS. A description of the
vulnerability can be found in Microsoft Security Bulletin
MS04-011:
http://www.microsoft.com/technet/security/bulletin/MS04-011.mspx
The worm is written in C++ and is approximately 10KB in size,
packed using UPX.
When launching, the worm copies itself to the Windows system
directory under a random name, and registers this file in the
system registry auto-run key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
WinUpdate = %system%\name of file
It also creates a registry key
HKLM\SOFTWARE\Microsoft\Wireless
Server = 1
It creates the mutexes "10", "u2" and "uterm5" to flag its
presence in the system. The worm chooses the IP-addresses of
random machines to infect and attack, similar to other worms
which exploit the same LSASS vulnerability.
Once infected, a victim machine will display an error message
that the LSASS service has failed. After this error message has
been displayed, the computer may reboot.
The worm open TCP ports 113, 3067 and 2041 to receive commands.
It attempts to connect to several IRC servers to receive commands
and transmit data.
moscow-advokat.ru
graz.at.eu.undernet.org
flanders.be.eu.undernet.org
caen.fr.eu.undernet.org
brussels.be.eu.undernet.org
los-angeles.ca.us.undernet.org
washington.dc.us.undernet.org
london.uk.eu.undernet.org
lia.zanet.net
gaspode.zanet.org.za
irc.kar.net
Detection of Korgo.A was published on May 24th, 2004 in the
following F-Secure Anti-Virus update:
[FSAV_Database_Version]
Version=2004-05-24_02
Write-up:
Kaspersky Lab and F-Secure Corp., May 2004
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