TSPY_BANKER.SSS
TrojanSpy:Win32/Banker.AHJ (Microsoft); PWS-Banker!hdr (McAfee); Downloader (Symantec); PAK:UPX, Trojan-Downloader.Win32.Banload.bvzf (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.7585863 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
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 creates the following folders:
- %System Root%\programsystem
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
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
winkav.cpl = "%System Root%\programsystem\winkav.cpl ini"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Attachments
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Ext
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Ext\CLSID
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
ConsentPromptBehaviorAdmin = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
PromptOnSecureDesktop = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
RunInvalidSignatures = "00000001"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Attachments
SaveZoneInformation = "00000001"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations
LowRiskFileTypes = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
NoAutoRebootWithLoggedOnUsers = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
UseWUServer = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
RescheduleWaitTime = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
NoAutoUpdate = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
AUOptions = "5"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
ScheduledInstallDay = "7"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\WindowsUpdate\
AU
ScheduledInstallTime = "7"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Ext
DisableAddonLoadTimePerformanceNotifications = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Ext
RestrictToList = "0"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Ext\CLSID
{6C7056C0-D338-48A6-89A7-35C387ADB588} = "1"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
CheckExeSignatures = "no"
(Note: The default value data of the said registry entry is yes.)
Dropping Routine
This spyware drops the following files:
- %System Root%\programsystem\reinit.vrx
- %System Root%\programsystem\x86vsdk37.cdx
- %System Root%\programsystem\processxxx2.vrx
- %System Root%\programsystem\gansh.vbs
- %System Root%\programsystem\winkav.cpl
- %System Root%\programsystem\processxxx.vrx
- %System Root%\programsystem\init.vrx
- %System Root%\sys7.log
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://cdx2015.{BLOCKED}sydns.com/mod//processxxx3.html
- http://cdx2015.{BLOCKED}sydns.com/mod//processxxx.html
- http://cdx2015.{BLOCKED}sydns.com/mod//infect/upx/index.php?{random characters}
This report is generated via an automated analysis system.
SOLUTION
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
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\Windows\CurrentVersion\Policies
- Attachments
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- Associations
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- Ext
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Ext
- CLSID
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
- winkav.cpl = "%System Root%\programsystem\winkav.cpl ini"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
- ConsentPromptBehaviorAdmin = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
- PromptOnSecureDesktop = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download
- RunInvalidSignatures = "00000001"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
- SaveZoneInformation = "00000001"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
- LowRiskFileTypes = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- NoAutoRebootWithLoggedOnUsers = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- UseWUServer = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- RescheduleWaitTime = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- NoAutoUpdate = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- AUOptions = "5"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- ScheduledInstallDay = "7"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
- ScheduledInstallTime = "7"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Ext
- DisableAddonLoadTimePerformanceNotifications = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Ext
- RestrictToList = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Ext\CLSID
- {6C7056C0-D338-48A6-89A7-35C387ADB588} = "1"
Step 5
Restore this modified 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\Internet Explorer\Download
- From: CheckExeSignatures = "no"
To: CheckExeSignatures = ""yes""
- From: CheckExeSignatures = "no"
Step 6
Search and delete these files
- %System Root%\programsystem\reinit.vrx
- %System Root%\programsystem\x86vsdk37.cdx
- %System Root%\programsystem\processxxx2.vrx
- %System Root%\programsystem\gansh.vbs
- %System Root%\programsystem\winkav.cpl
- %System Root%\programsystem\processxxx.vrx
- %System Root%\programsystem\init.vrx
- %System Root%\sys7.log
Step 7
Search and delete this folder
- %System Root%\programsystem
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANKER.SSS. 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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