Arrival Details
This Trojan 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 Trojan drops the following files:
- %User Temp%\setup.dat
- %User Temp%\data.dat
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions.sqlite
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3\chrome.manifest
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3\install.rdf
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions.sqlite\{A9E3A5E6-A75E-B689-2181-696FC74540D3\components\RMGetLicenseClass.js - detected as JS_MIUREF.A
(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.. %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 and executes the following files:
- %User Temp%\qpsbalkr.exe - also detected as TROJ_MIUREF.A
(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 processes:
It creates the following folders:
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3\components
(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 Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{GUID} = "%User Temp%\qpsbalkr.exe"
Information Theft
This Trojan gathers the following data:
- Computer Name / Username
- OS Version
- Browser Informations
Other Details
Based on analysis of the codes, it has the following capabilities:
- Install Browser plugins (it may do this monitor browser activites, display popup ads or execute arbitrary scripts)
It connects to the following website to send and receive information:
- http://{BLOCKED}.{BLOCKED}.80.139/{value}
- http://{BLOCKED}.{BLOCKED}.212.49/{value}
It creates the following event(s):
- {Computer Name}{Fullpath and Filename} special characters replaced with '_'
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
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To restart in Safe Mode:
• For Windows 2000 users
- Restart your computer.
- Press F8 when you see the Starting Windows bar at the bottom of the screen.
- Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.
• For Windows XP users
- Restart your computer.
- Press F8 after the Power-On Self Test (POST) routine is done. If the Windows Advanced Options menu does not appear, try restarting then pressing F8 several times when the POST screen appears.
- Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.
• For Windows Server 2003 users
- Restart your computer.
- Press F8 after Windows starts up. If the Windows Advanced Options menu does not appear, try restarting again and pressing F8 several times afterward.
- On the Windows Advanced Option menu, use the arrow keys to select Safe Mode then press Enter.
• For Windows Vista and Windows 7 users
- Restart your computer.
- Press F8 after the Power-On Self Test (POST) routine is done. If the Advanced Boot Options menu does not appear, try restarting and then pressing F8 several times after the POST screen is displayed.
- On the Advanced Boot Options menu, use the arrow keys to select the Safe Mode option, and then press Enter.
Step 3
Delete this registry value
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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\RunOnce
- {GUID} = "%User Temp%\qpsbalkr.exe"
To delete the registry value this malware created:
- Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
- In the left panel of the Registry Editor window, double-click the following:
In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce{GUID} = "%User Temp%\qpsbalkr.exe" - In the right panel, locate and delete the entry:
= - Close Registry Editor.
Step 4
Search and delete these folders
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Please make sure you check the
Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3
To delete malware/grayware/spyware folders:
- Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
- In the Named input box, type:
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3
- In the Look In drop-down list, select My Computer, then press Enter.
- Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.
- Repeat steps 2 to 4 for the remaining folders:
- %Application Data%\Mozilla\Firefox\Profiles\4wwmjcqo.default\extensions\{A9E3A5E6-A75E-B689-2181-696FC74540D3
Step 5
Search and delete this file
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There may be some files that are hidden. Please make sure you check the
Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
- %User Temp%\setup.dat
- %User Temp%\data.dat
To manually delete a malware/grayware file from an affected system:
• For Windows 2000, Windows XP, and Windows Server 2003:
- Right-click Start then click Search....
- In the left panel, click All Files.
- In the Named input box, type the following:
- %User Temp%\setup.dat
- %User Temp%\data.dat
- In the Look In drop-down list, select My Computer then press Enter.
- Once located, select the file then press SHIFT+DELETE to delete it.
• For Windows Vista and Windows 7 users:
- Click Start>Computer.
- In the Search input box, type the following:
- %User Temp%\setup.dat
- %User Temp%\data.dat
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_MIUREF.A. 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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