TSPY_ZBOT.BGSH
Mal/VB-AKH (Sophos) ,Trojan horse Inject2.KQF (AVG) ,W32/Dorkbot.BAA!tr (Fortinet) ,Trojan-Spy.Win32.Zbot (Ikarus) ,Trojan-Spy.Win32.Zbot.qwau (Kaspersky) ,PWS:Win32/Zbot.gen!AJ (Microsoft) ,RDN/Generic PWS.y!yi (McAfee) ,a variant of Win32/Injector.ATRR trojan (Eset) ,Generic (Panda) ,Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows XP (32-bit and 64-bit), Windows Server 2003, Windows Vista (32-bit and 64-bit), Windows 7 (32-bit and 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
385,024 bytes
EXE
Yes
05 Mar 2014
Connects to URLs/IPs
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:
- %Application Data%\{random folder name 1}\{random file name 1}.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%\Microsoft\Address Book\winxp.wab - for all Windows OSs except Vista and 7
- %Application Data%\{random folder name 2}\{random file name 2}.{random file extension}
(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 name 1}
- %Application Data%\{random folder name 2}
- %Application Data%\Microsoft\Address Book - for all Windows OSs except Vista and 7
(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
{random CLSID} = "%Application Data%\{random folder name 1}\{random file name 1}.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
{random}
HKEY_CURRENT_USER\Software\Microsoft\
WAB
It creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
{random port number 1}:UDP = "{random port number 1}:UDP:*:Enabled:UDP {random port number 1}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
{random port number 2}:TCP = "{random port number 2}:TCP:*:Enabled:TCP {random port number 2}"
Drop Points
Stolen information is uploaded to the following websites:
- http://{pseudorandom domain name}.info
- http://{pseudorandom domain name}.com
- http://{pseudorandom domain name}.biz
- http://{pseudorandom domain name}.net
- http://{pseudorandom domain name}.org
- http://{pseudorandom domain name}.ru
- http://{pseudorandom domain name}.pl
- http://{pseudorandom domain name}.so
Other Details
This spyware connects to the following URL(s) to check for an Internet connection:
- http://www.google.com
- http://www.bing.com
It deletes the initially executed copy of itself
NOTES:
The configuration file may contain the following information:
- Configuration for stealing online banking account credentials, including targeted banks
- Download link to an updated copy of its configuration file
- Download link to an updated copy of itself
- Site where it sends its stolen information
SOLUTION
9.700
10.644.06
05 Mar 2014
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\Software\Microsoft
- {random}
- {random}
- In HKEY_CURRENT_USER\Software\Microsoft
- WAB
- WAB
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
- {random CLSID} = "%Application Data%\{random folder name 1}\{random file name 1}.exe"
- {random CLSID} = "%Application Data%\{random folder name 1}\{random file name 1}.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- {random port number 1}:UDP = "{random port number 1}:UDP:*:Enabled:UDP {random port number 1}"
- {random port number 1}:UDP = "{random port number 1}:UDP:*:Enabled:UDP {random port number 1}"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- {random port number 2}:TCP = "{random port number 2}:TCP:*:Enabled:TCP {random port number 2}"
- {random port number 2}:TCP = "{random port number 2}:TCP:*:Enabled:TCP {random port number 2}"
Step 5
Search and delete these folders
- %Application Data%\{random folder name 1}
- %Application Data%\{random folder name 2}
- %Application Data%\Microsoft\Address Book
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.BGSH. 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 7
The following created registry key(s) cannot be identified by the user since there are no reference values in the created key. The only way it can be identified is by comparing the present keys with a backup of the system registry. Note that the said key(s) do not have to be deleted since it won't be harmful to the system:
- HKEY_CURRENT_USER\Software\Microsoft\{random}
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