TSPY_ZBOT.MJX
VirTool:Win32/Vbcrypt(Microsoft), W32/Dorkbot.BAA!tr(Fortinet), Win32/Spy.Zbot.AAO trojan(Eset), Troj/Zbot-DSP(Sophos)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
345,135 bytes
EXE
Yes
15 Jan 2013
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware drops the following copies of itself into the affected system and executes them:
- %Application Data%\{random folder 1}\{random}.exe
(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 drops the following files:
- %Application Data%\{random folder 2}\{random}.{random ext}
- %Application Data%\Microsoft\Address Book\{username}\winxp.wab
- %Application Data%\Microsoft\Address Book\{username}\winxp.wab~
(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 creates the following folders:
- %Application Data%\{random folder 1}
- %Application Data%\{random folder 2}
- %Application Data%\Microsoft\Address Book
(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.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Default} = "%Application Data%\{random folder 1}\{random}.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4\Wab File Name
HKEY_CURRENT_USER\Software\Microsoft\
WAB
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkContactRefresh = 0
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkFolderRefresh = 0
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
FirstRun = 1
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4\Wab File Name
{Default} = "%Application Data%\Microsoft\Address Book\{username}.wab"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
CleanCookies = 0
NOTES:
This spyware connects to random generated IP addresses.