TROJ_INJECT.PFL
VirTool:Win32/Injector.gen!CQ (Microsoft)
Windows

Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
55,296 bytes
EXE
No
14 Oct 2014
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 copies of itself into the affected system:
- %System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe (Windows Vista and higher versions)
- %Application Data%\HEX-5823-6893-6818\jusched.exe (Versions lower than Windows Vista)
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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:
- %System Root%\Users\Public\HEX-5823-6893-6818 (Windows Vista and higher versions)
- %Application Data%\HEX-5823-6893-6818 (Versions lower than Windows Vista)
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Java Update Manager = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe" (Windows Vista and higher versions)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Java Update Manager = "%Application Data%\HEX-5823-6893-6818\jusched.exe" (Versions lower than Windows Vista)
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Application Data%\HEX-5823-6893-6818\jusched.exe = "%Application Data%\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}ed.{BLOCKED}dio.net
SOLUTION
9.700
11.210.04
14 Oct 2014
11.213.00
15 Oct 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
Identify and terminate files detected as TROJ_INJECT.PFL
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
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
- Java Update Manager = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe" (Windows Vista and higher versions)
- Java Update Manager = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe" (Windows Vista and higher versions)
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Java Update Manager = "%Application Data%\HEX-5823-6893-6818\jusched.exe" (Versions lower than Windows Vista)
- Java Update Manager = "%Application Data%\HEX-5823-6893-6818\jusched.exe" (Versions lower than Windows Vista)
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
- %System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe = "%System Root%\Users\Public\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- %Application Data%\HEX-5823-6893-6818\jusched.exe = "%Application Data%\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
- %Application Data%\HEX-5823-6893-6818\jusched.exe = "%Application Data%\HEX-5823-6893-6818\jusched.exe:*:Enabled:Java Update Manager" (Versions lower than Windows Vista)
Step 5
Search and delete these folders
- %System Root%\Users\Public\HEX-5823-6893-6818 (Windows Vista and higher versions)
- %Application Data%\HEX-5823-6893-6818 (Versions lower than Windows Vista)
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_INJECT.PFL. 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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