Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:TR/Agent.rkx
Date discovered:20/08/2009
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:84.992 Bytes
MD5 checksum:73d8d7bc5112e434752e1be710ca25ea
IVDF version:7.01.05.139 - Thursday, August 20, 2009

 General Method of propagation:
Autorun feature


Aliases:
   •  Sophos: Mal/EncPk-JU
   •  Panda: W32/Ircbot.CKA
   •  Eset: Win32/IRCBot
   •  Bitdefender: Backdoor.Bot.104820


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


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

 Files It copies itself to the following locations:
   • %SYSDIR%\netmon.exe
   • %drive%\strongkey-rc1.3-build-208.exe



It deletes the initially executed copy of itself.



The following file is created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

%SYSDIR%\drivers\sysdrv32.sys Further investigation pointed out that this file is malware, too. Detected as: TR/Hacktool.Tcpz.A

 Registry The following registry key is added in order to run the process after reboot:

[HKLM\SYSTEM\CurrentControlSet\Services\sysdrv32]
   • "DisplayName"="Play Port I/O Driver"
   • "ErrorControl"=dword:0x00000001
   • "Group"="SST wanport drivers"
   • "ImagePath"="\??\%SYSDIR%\drivers\sysdrv32.sys"
   • "Start"=dword:0x00000003
   • "Type"=dword:0x00000001



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

  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "netmon"="%SYSDIR%\netmon.exe"



The following registry keys are added:

[HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\netmon]
   • "@"="Service"

[HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\netmon]
   • "@"="Service"



The following registry key is changed:

[HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   New value:
   • "%SYSDIR%\netmon.exe"="%SYSDIR%\netmon.exe:*:Disabled:netmon"

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: ni**********.com
Port: 4545
Channel: #tex
Nickname: [00-USA-XP-%number%]

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Tuesday, February 9, 2010
Description updated by Petre Galan on Tuesday, February 9, 2010

Back . . . .