TSPY_AGENT.VI
[5.nsis]:Generic PUP.x!fm., [6.nsis]:Generic PUP.x!rm., [8.nsis]:RDN/Generic Downloader.x!cx (McAfee); Trojan.Gen.2 (Symantec); Trojan-Downloader.Win32.Agent.wrxu (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Generic9.BSUM (AVG)
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
2,861,331 bytes
EXE
Yes
15 Jun 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 creates the following folders:
- %Program Files%\VaccineCheck
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\¹é½Åüũ
- %Program Files%\VaccineCheck\data
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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
VaccineCheck = "%Program Files%\VaccineCheck\VaccineCheckLaunch.exe"
Other System Modifications
This spyware deletes the following files:
- %User Temp%\nsr1.tmp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\VaccineCheck
HKEY_CURRENT_USER\Software\VaccineCheck\
files
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\App Paths\
VaccineCheckUp.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VaccineCheck
instdir = "%Program Files%\VaccineCheck"
HKEY_CURRENT_USER\Software\VaccineCheck
realtime = "Y"
HKEY_CURRENT_USER\Software\VaccineCheck
autosearch = "y"
HKEY_CURRENT_USER\Software\VaccineCheck
usebackup = "y"
HKEY_CURRENT_USER\Software\VaccineCheck
uselog = "y"
HKEY_CURRENT_USER\Software\VaccineCheck
partner = "woori"
HKEY_CURRENT_USER\Software\VaccineCheck
ud = "1"
HKEY_CURRENT_USER\Software\VaccineCheck\
files
VaccineCheckLaunch.exe = "1.0"
HKEY_CURRENT_USER\Software\VaccineCheck\
files
VaccineCheckUp.exe = "1.0"
HKEY_CURRENT_USER\Software\VaccineCheck\
files
VaccineCheck.exe = "1.0"
HKEY_CURRENT_USER\Software\VaccineCheck\
files
dt.cab = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
DisplayName = "¹é½Åüũ"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
UninstallString = "%Program Files%\VaccineCheck\uninst.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
DisplayIcon = "%Program Files%\VaccineCheck\VaccineCheckUp.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
DisplayVersion = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
URLInfoAbout = "http://www.VaccineCheck.co.kr"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
VaccineCheck
Publisher = "VaccineCheck"
Dropping Routine
This spyware drops the following files:
- %User Temp%\nsw3.tmp
- %Program Files%\VaccineCheck\VaccineCheckUp.exe
- %Start Menu%\Programs\¹é½Åüũ\VaccineCheck.lnk
- %Start Menu%\Programs\¹é½Åüũ\VaccineCheck »èÁ¦.lnk
- %Program Files%\VaccineCheck\VaccineCheckLaunch.exe
- %Program Files%\VaccineCheck\VaccineCheck.exe
- %Program Files%\VaccineCheck\install_p5.exe
- %Program Files%\VaccineCheck\data\dt.cab
- %Start Menu%\Programs\¹é½Åüũ\ȨÆäÀÌÁö.lnk
- %Program Files%\VaccineCheck\uninst.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://www.{BLOCKED}echeck.co.kr/app/ip.php
- http://www.{BLOCKED}echeck.co.kr/count/inst.php?{random characters}
This report is generated via an automated analysis system.
SOLUTION
9.300
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
- VaccineCheck
- In HKEY_CURRENT_USER\Software\VaccineCheck
- files
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\App Paths
- VaccineCheckUp.exe
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- VaccineCheck
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
- VaccineCheck = "%Program Files%\VaccineCheck\VaccineCheckLaunch.exe"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- instdir = "%Program Files%\VaccineCheck"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- realtime = "Y"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- autosearch = "y"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- usebackup = "y"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- uselog = "y"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- partner = "woori"
- In HKEY_CURRENT_USER\Software\VaccineCheck
- ud = "1"
- In HKEY_CURRENT_USER\Software\VaccineCheck\files
- VaccineCheckLaunch.exe = "1.0"
- In HKEY_CURRENT_USER\Software\VaccineCheck\files
- VaccineCheckUp.exe = "1.0"
- In HKEY_CURRENT_USER\Software\VaccineCheck\files
- VaccineCheck.exe = "1.0"
- In HKEY_CURRENT_USER\Software\VaccineCheck\files
- dt.cab = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- DisplayName = "¹é½Åüũ"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- UninstallString = "%Program Files%\VaccineCheck\uninst.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- DisplayIcon = "%Program Files%\VaccineCheck\VaccineCheckUp.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- DisplayVersion = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- URLInfoAbout = "http://www.VaccineCheck.co.kr"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\VaccineCheck
- Publisher = "VaccineCheck"
Step 5
Search and delete these components
- %User Temp%\nsw3.tmp
- %Program Files%\VaccineCheck\VaccineCheckUp.exe
- %Start Menu%\Programs\¹é½Åüũ\VaccineCheck.lnk
- %Start Menu%\Programs\¹é½Åüũ\VaccineCheck »èÁ¦.lnk
- %Program Files%\VaccineCheck\VaccineCheckLaunch.exe
- %Program Files%\VaccineCheck\VaccineCheck.exe
- %Program Files%\VaccineCheck\install_p5.exe
- %Program Files%\VaccineCheck\data\dt.cab
- %Start Menu%\Programs\¹é½Åüũ\ȨÆäÀÌÁö.lnk
- %Program Files%\VaccineCheck\uninst.exe
Step 6
Search and delete these folders
- %Program Files%\VaccineCheck
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\¹é½Åüũ
- %Program Files%\VaccineCheck\data
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_AGENT.VI. 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 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %User Temp%\nsr1.tmp
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