Windows 2000, Windows XP, Windows Server 2003
Propagates via software vulnerabilities
This worm may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.
TCP port 445 (Microsoft-DS)
57,344 bytes
PE
Yes
04 Mar 2010
Steals information, Drops files
Arrival Details
This worm may arrive via network shares.
It may be downloaded by other malware/grayware/spyware from remote sites.
It may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This worm drops the following component file(s):
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Windows Update = {malware path}\{malware file name}
Other Details
For more information on the aforementioned vulnerabilities, please see the following pages:
NOTES:
Information Theft Routine
This worm sends the IP address and Windows OS of the infected system to the remote user via email. It send these information using "gmail-smtp-in.l.google.com" or its own Simple Mail Transfer Protocol (SMTP) with the following format:
Subject: {IP address of the infected system}|{Windows OS}
From: {BLOCKED}03@yahoo.com
To: {BLOCKED}001@gmail.com
Message body: none
8.900
6.894.01
04 Mar 2010
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 3
Identify and terminate files detected as WORM_MYDOOM.SMB
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
Step 5
Scan your computer with your Trend Micro product to delete files detected as WORM_MYDOOM.SMB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 6
Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.