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Virus:TR/Ircbrute.A.941
Date discovered:12/10/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:81.920 Bytes
MD5 checksum:1F8CD13341245588FC97E8F05C551E7E
VDF version:7.10.05.181
IVDF version:7.10.12.192 - Tuesday, October 12, 2010

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Symantec: Backdoor.Sdbot
   •  Kaspersky: Trojan.Win32.Jorik.SdBot.fb
   •  TrendMicro: TROJ_JORIK.CIB
   •  Sophos: W32/SdBot-DPL
   •  Panda: Bck/Ircbot.CZZ


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


Side effects:
   • Drops files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\oldbin.exe

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

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Ci Servs"="oldbin.exe"

 P2P In order to infect other systems in the Peer to Peer network community the following action is performed:   It searches for directories that contain the following substring:
   • emule\incoming


 IRC – Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Join IRC channel
    • Leave IRC channel

 Miscellaneous Internet connection:
In order to check for its internet connection the following DNS server is contacted:
   • nice.niceshot.in


Anti debugging
It checks for running programs that contain one of the following strings:
   • tcpview
   • filemon
   • procmon


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


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

说明添加者: Andrei Ilie 打开 2011年3月22日星期二
说明更新者: Andrei Ilie 打开 2011年3月23日星期三

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