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Suclove

Posted: March 28, 2006

Suclove is a dangerous widely-spread Internet worm that propagates by e-mail in messages with infected attachments and through IRC chat networks using mIRC application. The spyware usually arrives in files that look like regular text documents, but actually have .exe extension and therefore are executable. Once the user runs such a file, Suclove secretly installs itself to the computer and initiates a spreading routine. It uses Microsoft Outlook to send harmful e-mail letters to all the contacts in the Microsoft Outlook and Yahoo! Messenger address books. Suclove includes a backdoor that gives the attacker remote unauthorized access to a compromised PC and allows him to download and execute arbitrary files. The worm also disables the Registry Editor and alters essential computer settings in order to hide from the user. Suclove runs on every Windows startup.

File System Modifications

  • The following files were created in the system:
    # File Name
    1 dllhost.dll
    2 loader32.com
    3 loveletter.doc.exe
    4 outlook.vbs
    5 sender.vbs
    6 winlogon.exe

Registry Modifications

  • The following newly produced Registry Values are:
    HKEY..\..\..\..{RegistryKeys}HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesSystemDisableRegistryTools=1HKEY_LOCAL_MACHINESOFTWAREClassesdllfileShellOpenCommand@="1"%*HKEY_LOCAL_MACHINESOFTWAREClassesexefileShellOpenCommand@="%System%loader32.com"%1HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerHideFileExtCheckedValue=1HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesExplorerNoFolderOptions=1HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesExplorerRun@=C:winlogon.exeHKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRunDLL32=dllhost.dll
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