Fake Outlook update – New ZBot (June 23, 2009)


SonicWALL UTM Research team observed a fake Critical Update for Microsoft Outlook spam. The email has a link to a spoofed Microsoft security website which serves a new ZBot Trojan variant.

ZBot is a banking trojan that disables firewall, steals sensitive financial data (credit card numbers, online banking login details), makes screen snapshots, downloads additional components, and provides a hacker with the remote access to the compromised system. Read more about Zeus/Zbot Trojan Family here: https://www.mysonicwall.com/SonicAlert/index.asp?ev=article&id=132

This malware is 83,456 bytes in size.

When executed it creates the following files on the system:

  • %System%lowseclocal.ds
  • %System%lowsecuser.ds
  • %System%lowsecuser.ds.lll
  • %System%sdra64.exe

It modifies registry:

 [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon] Userinit = "%System%userinit.exe,%System%sdra64.exe," 

so that sdra64.exe runs every time Windows starts

It creates registry entries:

 [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionNetwork] UID = "%ComputerName%_0004DCC0"  and   [HKEY_USERS.DEFAULTSoftwareMicrosoftWindowsCurrentVersionInternet Settings] ProxyEnable = 0x00000000 

The e-mail looks like:


The Trojan is also known as trojan Trojan-Spy.Win32.Zbot.xdj [Kaspersky], Mal/Zbot-O [Sophos] and Trojan.Spy.LooksLike.ZBot [McAfee]

SonicWALL Gateway AntiVirus provides protection against this malware via GAV: Zbot.XDJ (Trojan) signature.

Security News
The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.