Virus:Worm/IRCBot.aak
Date discovered:19/07/2007
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:75.549 Bytes
MD5 checksum:4629915b7e40dddedf7deeb07ced5784
VDF version:6.39.00.34 - Tuesday, June 19, 2007
IVDF version:6.39.00.34 - Tuesday, June 19, 2007

 General Method of propagation:
   • Email


Aliases:
   •  Mcafee: W32/Sdbot.worm.gen.l
   •  Kaspersky: Backdoor.Win32.IRCBot.aak
   •  F-Secure: Backdoor.Win32.IRCBot.aak
   •  Panda: Trj/Mailbot.CE
   •  Eset: Win32/IRCBot.XN
   •  Bitdefender: Backdoor.RBot.BTK


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops malicious files
   • Uses its own Email engine
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\mdmd.exe



It deletes the initially executed copy of itself.



The following file is created:

– %SYSDIR%\helpermdmd.exe Furthermore it gets executed after it was fully created. Detected as: TR/Proxy.Slaper.E.51

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "melg34"="%SYSDIR%\mdmd.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "melg34"="%SYSDIR%\mdmd.exe"

 Backdoor Contact server:
The following:
   • l4.penny**********:24104

As a result it may send information and remote control could be provided.

Remote control capabilities:
    • Send emails

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

Description inserted by Ana Maria Niculescu on Wednesday, October 3, 2007
Description updated by Ana Maria Niculescu on Thursday, October 4, 2007

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