W32/MyTob.MZ@mm

Visible Symptoms

• Security, Antivirus and debugging software programs and services suddenly terminate after opening an email attachment
  
  
• Creation of the file "winsvc.exe" into the System32 folder
  
  
• Unable to connect with various security websites after becoming infected
  
  
• High CPU usage and utilization due to routines of the virus on an infected system

Detailed Analysis

This threat is a 32bit executable file

Network/Internet:

• It spreads through mass-emailing

Files:

• Copies itself to the system

• Installation to System:

  • When run, it copies itself to:
    %SystemRoot%\%WinDir%\winsvc.exe
  • And creates these registry entries:
    HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WINDOWS SVC, HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices\WINDOWS SVC

  Spreading in e-mails:

  • Emails it generates use the following subjects randomly:
    Important Notification
    Notice of account limitation
    You have successfully updated your password
    Your Account is Suspended
    Your password has been successfully updated
    
  • Emails it generates use the following attachment names::
    password.zip
    important-details.zip
    email-password.zip
    account-report.zip
    account-info.zip
    account-details.zip