TSPY_ZBOT.GP
Trojan:Win32/Bumat!rts (Microsoft), W32/Pinkslipbot.gen.ae (McAfee), Trojan horse Cryptic.CVU (AVG), Trojan-Spy.Win32.Zbot (Ikarus), a variant of Win32/Kryptik.OJA trojan (Nod32), FraudTool.Win32.AVSoft (v) (Sunbelt), TrojanSpy.Zbot.bodc (Vba32)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.
It modifies the Internet Explorer Zone Settings.
TECHNICAL DETAILS
171,008 bytes
EXE
Yes
26 May 2011
Arrival Details
This spyware may be dropped by other malware.
It may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This spyware drops the following copies of itself into the affected system:
- %User Profile%\Application Data\{random folder 1}\{random file name 1}.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It drops the following files:
- %User Profile%\Application Data\{random folder 2}\{random file name 2}
- %User Profile%\Application Data\Microsoft\Address Book\{user name}.wab
- %User Profile%\Application Data\Microsoft\Address Book\{user name}.wab~
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It creates the following folders:
- %User Profile%\Application Data\{random folder 1}
- %User Profile%\Application Data\{random folder 2}
- %Application Data%\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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
{EA3979E6-8275-5697-6087-08469C1242AD} = ""%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe""
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0\Mail
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0\News
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0\Rules
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0\Trident
HKEY_CURRENT_USER\Software\Microsoft\
{random registry key}
HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager
It adds the following registry entries:
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
SpellDontIgnoreDBCS = "1"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
MSIMN = "1"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
StoreMigratedV5 = "1"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
ConvertedToDBX = "1"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
Settings Upgraded = "7"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
Running = "0"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
Store Root = "{random values}"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
SpoolerDlgPos = "{random values}"
HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\
Software\Microsoft\Outlook Express\
5.0
SpoolerTack = "0"
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) = ""%User Profile%\Application Data\Microsoft\Address Book\{user name}.wab""
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
CleanCookies = "0"
Web Browser Home Page and Search Page Modification
This spyware modifies the Internet Explorer Zone Settings.
Other Details
This spyware connects to the following possibly malicious URL:
- http://{BLOCKED}eet.ru/offline8.bin
SOLUTION
8.900
8.182.08
26 May 2011
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
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.
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Mail
- Mail
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- News
- News
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Rules
- Rules
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Trident
- Trident
- In HKEY_CURRENT_USER\Software\Microsoft
- {random registry key}
- {random registry key}
- In HKEY_CURRENT_USER\Software\Microsoft
- Internet Account Manager
- Internet Account Manager
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.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {EA3979E6-8275-5697-6087-08469C1242AD} = "%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe"
- {EA3979E6-8275-5697-6087-08469C1242AD} = "%User Profile%\Application Data\{random folder name 1}\{random file name 1}.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- OlkContactRefresh = "0"
- OlkContactRefresh = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- OlkFolderRefresh = "0"
- OlkFolderRefresh = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- FirstRun = "1"
- FirstRun = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4\Wab File Name
- (Default) = "%User Profile%\Application Data\Microsoft\Address Book\{user name}.wab"
- (Default) = "%User Profile%\Application Data\Microsoft\Address Book\{user name}.wab"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Privacy
- CleanCookies = "0"
- CleanCookies = "0"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- ConvertedToDBX = "1"
- ConvertedToDBX = "1"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- MSIMN = "1"
- MSIMN = "1"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Running = "0"
- Running = "0"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Settings Upgraded = "7"
- Settings Upgraded = "7"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- SpellDontIgnoreDBCS = "1"
- SpellDontIgnoreDBCS = "1"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- StoreMigratedV5 = "1"
- StoreMigratedV5 = "1"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- Store Root = "{random values}"
- Store Root = "{random values}"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- SpoolerDlgPos = "{random values}"
- SpoolerDlgPos = "{random values}"
- In HKEY_CURRENT_USER\Identities\{7FD52C46-2945-4672-92E7-814729401ADD}\Software\Microsoft\Outlook Express\5.0
- SpoolerTack = "0"
- SpoolerTack = "0"
Step 5
Search and delete these folders
Step 6
Search and delete these files
Step 7
Reset Internet security settings
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.GP. 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.
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