Worm/Aimbot.ER - Worm

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Summary

Full description

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Virus:	Worm/Aimbot.ER
Date discovered:	16/08/2006
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium to high
Damage Potential:	Medium
Static file:	Yes
File size:	52.224 Bytes
MD5 checksum:	48d99490c725f9820Bd34f221ef8d59b
VDF version:	6.35.01.101
IVDF version:	6.35.01.102 - Wed, 16 Aug 2006 15:23 (GMT+1)

General Methods of propagation:
   • Local network
   • Messenger

Aliases:
   • Kaspersky: Backdoor.Win32.Aimbot.er
   • Bitdefender: Backdoor.Sdbot.HXK

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

Side effects:
   • Lowers security settings
   • Registry modification
   • Makes use of software vulnerability
   • Steals information
   • Third party control

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

It deletes the initially executed copy of itself.

Registry The following registry keys are added in order to load the services after reboot:

– HKLM\System\CurrentControlSet\Services\TSKMS
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%WINDIR%\taskms.exe"
   • "DisplayName"="Task Manager Message Service"
   • "ObjectName"="LocalSystem"
   • "FailureActions"=%hexvalues%
   • "Description"="Provides task manager information reguarding with the Microsoft Messenger Service."

– HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TSKMS\Enum
   • "0"="Root\\LEGACY_TSKMS\\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001

– HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TSKMS\Security
   • "Security"=%hexvalues%

The following registry keys are added:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
   • "Melt"="%malware execution directory%\%executed file%"

– HKLM\SOFTWARE\Microsoft\Security Center
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\parameters
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
   • "DoNotAllowXPSP2"=dword:00000001

The following registry keys are changed:

Deactivate Windows XP Firewall:
– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
   New value:
   • "EnableFirewall"=dword:00000000

Deactivate Windows XP Firewall:
– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
   New value:
   • "EnableFirewall"=dword:00000000

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update
   Old value:
   • "AUOptions"=%user defined settings%
   • "AUState"=%user defined settings%
   New value:
   • "AUOptions"=dword:00000001
   • "AUState"=dword:00000007

– HKLM\SYSTEM\CurrentControlSet\Services\wscsvc
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\Messenger
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   Old value:
   • "restrictanonymous"=%user defined settings%
   New value:
   • "restrictanonymous"=dword:00000001

– HKLM\SOFTWARE\Microsoft\Ole
   Old value:
   • "EnableDCOM"="Y"
   New value:
   • "EnableDCOM"="N"

Messenger It is spreading via Messenger. The characteristics are described below:

– AIM Messenger
– ICQ Messenger
– MSN Messenger
– Yahoo Messenger

To:
All open conversation windows.

Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

Exploit:
It makes use of the following Exploits:
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-039 (Buffer Overrun in RPCSS Service)
– MS03-049 (Buffer Overrun in the Workstation Service)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)

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

Server: pwn.ultimate**********
Port: 405
Server password: nigga
Channel: #sti
Nickname: [P00|USA|%five-digit random character string%]
Password: torque

– This malware has the ability to collect and send information such as:
    • Cached passwords
    • Malware uptime

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Disable DCOM
    • disconnect from IRC server
    • Download file
    • Edit registry
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Perform DDoS attack
    • Perform network scan
    • Start spreading routine
    • Terminate process
    • Updates itself

Miscellaneous Mutex:
It creates the following Mutex:
• tghynjk

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 the following runtime packer:
• PECompact

See a brief description here.

Description inserted by Teodor Onisor on Fri, 18 Aug 2006 08:45 (GMT+1)
Description updated by Teodor Onisor on Fri, 18 Aug 2006 14:32 (GMT+1)

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