TSPY_MIUREF.AL
Trojan:Win32/Miuref.F(Microsoft),Trojan.Win32.VBKryjetor.xb(Kaspersky),a variant of Win32/Injector.BOVR trojan(NOD32)
Windows
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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 connects to certain websites to send and receive information.
TECHNICAL DETAILS
134,560 bytes
EXE
Yes
28 Nov 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:
- %AppDataLocal%\{random folder name 2}\{malware file name}.exe
(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It drops the following files:
- %User Temp%\Cab{random}.tmp - will be deleted afterwards
- %User Temp%\Tar{random}.tmp - will be deleted afterwards
- %AppDataLocal%\{random folder name 2}\{GUID}
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It creates the following folders:
- %AppDataLocal%\{random folder name 2}
- %AppDataLocal%\{random folder name}
(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
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 folder name 2} = "%AppDataLocal%\{random folder name 2}\{malware file name}.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random folder} = "{regsvr32.exe or %System%\regsvr32.exe} "%AppDataLocal%\{random folder}\{random file name}.dll"" <-Created autostart for component
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\{name based on random folder}
It adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\{name based on random folder}
{GUID} = "{hex value data}"
Download Routine
This spyware saves the files it downloads using the following names:
- %AppDataLocal%\{random folder}\{random file name}.dll
- %AppDataLocal%\{random folder}\{random file name}.txt
- %AppDataLocal%\{random folder}\{random file name}.dat
- %AppDataLocal%\{random folder}\{random file name}.idx
- %AppDataLocal%\{random folder}\{random file name}.lck
(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Information Theft
This spyware gathers the following data:
- Operating system version
- Device information
- System boot information
- Windows Management Instrumentation informations(BIOS,Video Controller,Display Configuration)
- Processor information
Stolen Information
This spyware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}9.{BLOCKED}9.112.229
Other Details
This spyware connects to the following URL(s) to check for an Internet connection:
- http://www.microsoft.com
It connects to the following website to send and receive information:
- {BLOCKED}7.{BLOCKED}3.6.72:443
- 1.{BLOCKED}ounter.info:443
- 2.{BLOCKED}ounter.info:443
- 3.{BLOCKED}ounter.info:443
- 4.{BLOCKED}ounter.info:443
- 5.{BLOCKED}ounter.info:443
- {BLOCKED}ces24.org:443
- {BLOCKED}chpage.com:443
- {BLOCKED}1.{BLOCKED}7.180.154:443
It does the following:
- Loads/injects itself or other downloaded component(s) to running processes
- Downloads component/configuration/file
- Create an autostart registry for the downloaded components
- Install an extension for Chrome and insert an add-ons for Firefox(this can include click fraud)
- Receives information for redirection and new connections
- Notifies infection of machine(GUID and Computer name)
NOTES:
It can receive information of SMTP server(s) to connect, compose and send an email.
The {random folder} can be {random folder name} or {random folder name 2}.
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.700
11.322.01
05 Dec 2014
11.323.00
06 Dec 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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Restart in Safe Mode
Step 4
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
- {name based on random folder}
- {name based on random folder}
Step 5
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 folder name 2} = "%AppDataLocal%\{random folder name 2}\{malware file name}.exe"
- {random folder name 2} = "%AppDataLocal%\{random folder name 2}\{malware file name}.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {random folder} = "{regsvr32.exe or %System%\regsvr32.exe} "%AppDataLocal%\{random folder}\{random file name}.dll""
- {random folder} = "{regsvr32.exe or %System%\regsvr32.exe} "%AppDataLocal%\{random folder}\{random file name}.dll""
Step 6
Search and delete these folders
- %AppDataLocal%\{random folder name 2}
- %AppDataLocal%\{random folder name}
Step 7
Search and delete this file
- %User Temp%\Cab{random}.tmp
- %User Temp%\Tar{random}.tmp
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_MIUREF.AL. 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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