TROJ_ZBOT.ESF

This Trojan adds registry entries to disable Internet Explorer (IE).

This Trojan modifies the Internet Explorer Zone Settings.

It steals certain information from the system and/or the user.

Arrival Details

This Trojan may be downloaded from the following remote sites:

• http://{BLOCKED}hcheckstart.com/large.exe

Installation

This Trojan adds the following folders:

• %Application Data%\{random folder name 1}
• %Application Data%\{random folder name 2}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It injects itself into the following processes running in the affected system's memory:

• explorer.exe
• taskhost.exe
• taskeng.exe
• Dwm.exe
• wscntfy.exe
• ctfmon.exe
• rdpclip.exe

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{GUID} = %Application Data%\{random folder name 1}\{random file name}.exe

It drops the following files:

• %Application Data%\{random folder name 1}\{random file name}.exe - copy of itself
• %Application Data%\{random folder name 2}\{random file name} - contains encrypted stolen data

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other System Modifications

This Trojan adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
{random characters}

It creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\EXPLORER.EXE = "%Windows%\EXPLORER.EXE:*:Enabled:Windows Explorer"

Web Browser Home Page and Search Page Modification

This Trojan modifies the Internet Explorer Zone Settings.

Information Theft

This Trojan monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar and/or title bar:

• https*/ach/*
• https*/wire/*
• https*/wires/*
• https*53.com*
• https*banking-services.com*
• https*bankofamerica.com*
• https*bbt.com*
• https*bnymellon*
• https*brdoffice*
• https*business.hsbc*
• https*businessonline.tdbank.com*
• https*capitalone.com*
• https*capitalonebank*
• https*cashplus*
• https*chase.com*
• https*citigroup.com*
• https*cmserver*
• https*comerica.com*
• https*directnet*
• https*ebc_ebc*
• https*enternetbank*
• https*firstplacebankecomm*
• https*fiservsa4*
• https*fnbgranbury*
• https*fremontnational*
• https*goldleaf*
• https*gs.com/*
• https*gsfundadmin.com/*
• https*hewitt.com*
• https*hsbcnet*
• https*iebanking*
• https*internetbanking*
• https*jpmorgan.com*
• https*jpmorganchase*
• https*key.com*
• https*morganstanley*
• https*mphro.com*
• https*northerntrust.com*
• https*onlinecashmanagement*
• https*pnc.com*
• https*pncbank.com*
• https*raiffeisendirect*
• https*raiffeisenonline*
• https*rbc*
• https*rbs.com*
• https*regions.com*
• https*scotiabank*
• https*secure.ally.com*
• https*singlepoint.usbank.com*
• https*statestreet.com*
• https*suntrust*
• https*svbconnect*
• https*tdcommercialbanking*
• https*unicreditbank*
• https*volksbankromania*
• https*wachovia.com*
• https*webcashmgmt*
• https*wellsfargo.com*

It accesses the following site to download its configuration file:

• http://{BLOCKED}thcheckstart.com/product-specs-9.html
• http://{BLOCKED}ns.com/ban.rmftl
• http://{BLOCKED}minute.com/ban.dtld

It steals the following information:

• Personal certificates (MY)
• FTP credentials for the following FTP applications:
  • FlashXP
  • Ghisler
  • IPSwitch
  • Filezilla
  • FTPFar
  • WinSCP
  • FTPCommander
  • CoreFTP
  • SmartFTP
  • Flashplayer data
• Internet session cookies

Drop Points

Stolen information is uploaded to the following websites:

• http://{BLOCKED}hcheckstart.com/rss233.php

Variant Information

This Trojan has the following MD5 hashes:

• dfbee86af1738e9819708f5fca9e7dc5

It has the following SHA1 hashes:

• 17590d6edba7f2c81487d40b3bdca6bc7d97180e

NOTES:

Adds the following registry entries to disable Internet Explorer (IE):

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter
Enabled = 0
EnabledV8 = 0