Thursday, January 22, 2009

Virus or Worm Attack in January 2009

A virus or worm attack which know as either "Downadup" or "Conficker" had infected 9 million PCs. So please go to the following article to check the details of this virus or worm. Here are some brief details about it:

Summary

Win32/Conficker is a worm that infects other computers across a network by exploiting a vulnerability in the Windows Server service (SVCHOST.EXE). If the vulnerability is successfully exploited, it could allow remote code execution when file sharing is enabled. Depending on the specific variant, it may also spread via removable drives and by exploiting weak passwords. It disables several important system services and security products and downloads arbitrary files.
Microsoft strongly recommends that users apply the update referred to in Security Bulletin MS08-067 immediately.
Microsoft also recommends that users ensure that their network passwords are strong to prevent this worm from spreading via weak administrator passwords. More information is available here.

Symptoms

System Changes
The following system changes may indicate the presence of this malware:
  • The following services are disabled or fail to run:
  • Windows Security Center Service
    Windows Update Auto Update Service
    Background Intelligence Transfer Service
    Windows Defender
    Error Reporting Service
    Windows Error Reporting Service
  • Some accounts may be locked out due to the following registry modification, which may flood the network with connections:
  • HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
    "TcpNumConnections" = "0x00FFFFFE"
  • Users may not be able to connect to websites or online services that contain the following strings:
  • virus
    spyware
    malware
    rootkit
    defender
    microsoft
    symantec
    norton
    mcafee
    trendmicro
    sophos
    panda
    etrust
    networkassociates
    computerassociates
    f-secure
    kaspersky
    jotti
    f-prot
    nod32
    eset
    grisoft
    drweb
    centralcommand
    ahnlab
    esafe
    avast
    avira
    quickheal
    comodo
    clamav
    ewido
    fortinet
    gdata
    hacksoft
    hauri
    ikarus
    k7computing
    norman
    pctools
    prevx
    rising
    securecomputing
    sunbelt
    emsisoft
    arcabit
    cpsecure
    spamhaus
    castlecops
    threatexpert
    wilderssecurity
    windowsupdate

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