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Virus:TR/Kazy.24846.24
Date discovered:09/06/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:181.248 Bytes
MD5 checksum:34F129596DE430B1A902272EB62FDD01
VDF version:7.11.09.128 - Thursday, June 9, 2011
IVDF version:7.11.09.128 - Thursday, June 9, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
     DrWeb: Trojan.DownLoader3.7697
     Norman: W32/Crypt.AVAU


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
    Windows Vista
    Windows 7


Side effects:
   • Third party control
   • Drops files
   • Lowers security settings
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %TEMPDIR%\csrss.exe



It modifies the following file:
   • %APPDATA%\Mozilla\Firefox\Profiles\f81lb9un.default\prefs.js
As a result various security mechanisms are disabled.



The following file is created:

%APPDATA%\%hex values%.%hex values% Contains parameters used by the malware.

 Registry One of the following values is added in order to run the process after reboot:

  [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   • "Load"="%TEMPDIR%\csrss.exe"



The following registry key is added:

[HKEY_CURRENT_CONFIG\Software\Microsoft\windows\CurrentVersion\
   Internet Settings]
   • "ProxyEnable"=dword:00000001



The following registry key is changed:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:00000001
   • "ProxyEnable"=dword:00000001
   • "ProxyServer"="http=127.0.0.1:%number%"

 Process termination Processes with one of the following strings are terminated:
   • Alwil Software*; avast; Avast*; AvastUI.exe; AVG; avgnt.exe; avira;
      Avira*; BitDefender; ccsvchst.exe; Dr.Web; ESET NOD32; Kaspersky;
      mcafee; McAfee*; mcagent.exe; none; norton; Norton*; Symantec*


 Backdoor The following ports are opened:

%executed file% on a random TCP port in order to provide a proxy server.
%executed file% on a random TCP port in order to provide backdoor capabilities.

 Stealing  It uses a network sniffer that checks for the following string:
   • google

 Miscellaneous Mutex:
It creates the following Mutex:
   • {5D92BB9F-9A66-458f-ACA4-66172A7016D4}

 File details Programming language:
The malware program was written in MS Visual C++.

Description inserted by Andrei Ilie on Thursday, September 1, 2011
Description updated by Andrei Ilie on Thursday, September 1, 2011

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