PUA.Win32.InstallCore.MANHOCFH
AdWare.Win32.DealPly.heur (KASPERSKY)
Windows
Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Potentially Unwanted Application 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. However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
1,642,728 bytes
EXE
18 Dec 2023
Connects to URLs/IPs, Drops files, Modifies system registry
Arrival Details
This Potentially Unwanted Application 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 Potentially Unwanted Application drops the following files:
- %User Temp%\{Random Hex}.log
- %User Temp%\inH{Random Numbers}\csshover3.htc
- %User Temp%\inH{Random Numbers}\form.bmp.Mask
- %User Temp%\inH{Random Numbers}\css\ie6_main.css
- %User Temp%\inH{Random Numbers}\css\main.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\browse.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\button.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\checkbox.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\progress-bar.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\button-bg.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg-corner.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg2.png
- %User Temp%\inH{Random Numbers}\images\BG.png
- %User Temp%\inH{Random Numbers}\images\Close.png
- %User Temp%\inH{Random Numbers}\images\Close_Hover.png
- %User Temp%\inH{Random Numbers}\images\Color_Button.png
- %User Temp%\inH{Random Numbers}\images\Color_Button_Hover.png
- %User Temp%\inH{Random Numbers}\images\Grey_Button.png
- %User Temp%\inH{Random Numbers}\images\Grey_Button_Hover.png
- %User Temp%\inH{Random Numbers}\images\Icon_Generic.png
- %User Temp%\inH{Random Numbers}\images\Loader.gif
- %User Temp%\inH{Random Numbers}\images\Minimize.png
- %User Temp%\inH{Random Numbers}\images\Minimize_Hover.png
- %User Temp%\inH{Random Numbers}\images\Pause_Button.png
- %User Temp%\inH{Random Numbers}\images\Progress.png
- %User Temp%\inH{Random Numbers}\images\ProgressBar.png
- %User Temp%\inH{Random Numbers}\images\Quick_Specs.png
- %User Temp%\inH{Random Numbers}\images\Resume_Button.png
- %User Temp%\inH{Random Numbers}\images\sponsored.png
- %User Temp%\inH{Random Numbers}\locale\CS.locale
- %User Temp%\inH{Random Numbers}\locale\DA.locale
- %User Temp%\inH{Random Numbers}\locale\DE.locale
- %User Temp%\inH{Random Numbers}\locale\EL.locale
- %User Temp%\inH{Random Numbers}\locale\EN.locale
- %User Temp%\inH{Random Numbers}\locale\ES.locale
- %User Temp%\inH{Random Numbers}\locale\FR.locale
- %User Temp%\inH{Random Numbers}\locale\ID.locale
- %User Temp%\inH{Random Numbers}\locale\IT.locale
- %User Temp%\inH{Random Numbers}\locale\JA.locale
- %User Temp%\inH{Random Numbers}\locale\KO.locale
- %User Temp%\inH{Random Numbers}\locale\NL.locale
- %User Temp%\inH{Random Numbers}\locale\NO.locale
- %User Temp%\inH{Random Numbers}\locale\PL.locale
- %User Temp%\inH{Random Numbers}\locale\PT.locale
- %User Temp%\inH{Random Numbers}\locale\RU.locale
- %User Temp%\inH{Random Numbers}\locale\SV.locale
- %User Temp%\inH{Random Numbers}\locale\TR.locale
- %User Temp%\inH{Random Numbers}\locale\ZH.locale
- %User Temp%\in43A9003C\{Random Numbers}.tmp
- %User Temp%\inH{Random Numbers}\bootstrap_{Random Numbers}.html
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following processes:
- "{Malware Path}\{Malware Filename}" /_ShowProgress /PrTxt:TG9hZGluZy4uLg== /mnl
It creates the following folders:
- %User Temp%\inH{Random Numbers}
- %User Temp%\inH{Random Numbers}\css
- %User Temp%\inH{Random Numbers}\css\sdk-ui
- %User Temp%\inH{Random Numbers}\images
- %User Temp%\inH{Random Numbers}\locale
- %User Temp%\in{Random Hex}
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Other System Modifications
This Potentially Unwanted Application adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
EnableConsoleTracing = 0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
EnableFileTracing = 0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
FileTracingMask = 4294901760
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
ConsoleTracingMask = 4294901760
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
MaxFileSize = 1048576
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
FileDirectory = %windir%\tracing
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
EnableFileTracing = 0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
EnableConsoleTracing = 0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
FileTracingMask = 4294901760
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
ConsoleTracingMask = 4294901760
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
MaxFileSize = 1048576
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
FileDirectory = %windir%\tracing
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Connections
SavedLegacySettings = {Hex Values}
(Note: The default value data of the said registry entry is {Default Hex Values}.)
Other Details
This Potentially Unwanted Application adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASAPI32
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\INSTALLCORE_RASMANCS
It connects to the following website to send and receive information:
- ww42.{BLOCKED}ri-hocute.com
- {BLOCKED}osiri-hocute.com
However, as of this writing, the said sites are inaccessible.
SOLUTION
9.800
2.685.00
21 Dec 2023
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- TROJ.Win32.TRX.XXPE50FSX041
Step 2
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 3
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 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- EnableConsoleTracing = 0
- EnableConsoleTracing = 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- EnableFileTracing = 0
- EnableFileTracing = 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- FileTracingMask = 4294901760
- FileTracingMask = 4294901760
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- ConsoleTracingMask = 4294901760
- ConsoleTracingMask = 4294901760
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- MaxFileSize = 1048576
- MaxFileSize = 1048576
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASAPI32
- FileDirectory = %windir%\tracing
- FileDirectory = %windir%\tracing
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- EnableFileTracing = 0
- EnableFileTracing = 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- EnableConsoleTracing = 0
- EnableConsoleTracing = 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- FileTracingMask = 4294901760
- FileTracingMask = 4294901760
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- ConsoleTracingMask = 4294901760
- ConsoleTracingMask = 4294901760
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- MaxFileSize = 1048576
- MaxFileSize = 1048576
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\INSTALLCORE_RASMANCS
- FileDirectory = %windir%\tracing
- FileDirectory = %windir%\tracing
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\Windows\CurrentVersion\Internet Settings\Connections
- SavedLegacySettings = {Hex Values}
- SavedLegacySettings = {Hex Values}
Step 6
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\
- INSTALLCORE_RASAPI32
- INSTALLCORE_RASAPI32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\
- INSTALLCORE_RASMANCS
- INSTALLCORE_RASMANCS
Step 7
Search and delete this file
- %User Temp%\{Random Hex}.log
- %User Temp%\inH{Random Numbers}\csshover3.htc
- %User Temp%\inH{Random Numbers}\form.bmp.Mask
- %User Temp%\inH{Random Numbers}\css\ie6_main.css
- %User Temp%\inH{Random Numbers}\css\main.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\browse.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\button.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\checkbox.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\progress-bar.css
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\button-bg.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg-corner.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg.png
- %User Temp%\inH{Random Numbers}\css\sdk-ui\images\progress-bg2.png
- %User Temp%\inH{Random Numbers}\images\BG.png
- %User Temp%\inH{Random Numbers}\images\Close.png
- %User Temp%\inH{Random Numbers}\images\Close_Hover.png
- %User Temp%\inH{Random Numbers}\images\Color_Button.png
- %User Temp%\inH{Random Numbers}\images\Color_Button_Hover.png
- %User Temp%\inH{Random Numbers}\images\Grey_Button.png
- %User Temp%\inH{Random Numbers}\images\Grey_Button_Hover.png
- %User Temp%\inH{Random Numbers}\images\Icon_Generic.png
- %User Temp%\inH{Random Numbers}\images\Loader.gif
- %User Temp%\inH{Random Numbers}\images\Minimize.png
- %User Temp%\inH{Random Numbers}\images\Minimize_Hover.png
- %User Temp%\inH{Random Numbers}\images\Pause_Button.png
- %User Temp%\inH{Random Numbers}\images\Progress.png
- %User Temp%\inH{Random Numbers}\images\ProgressBar.png
- %User Temp%\inH{Random Numbers}\images\Quick_Specs.png
- %User Temp%\inH{Random Numbers}\images\Resume_Button.png
- %User Temp%\inH{Random Numbers}\images\sponsored.png
- %User Temp%\inH{Random Numbers}\locale\CS.locale
- %User Temp%\inH{Random Numbers}\locale\DA.locale
- %User Temp%\inH{Random Numbers}\locale\DE.locale
- %User Temp%\inH{Random Numbers}\locale\EL.locale
- %User Temp%\inH{Random Numbers}\locale\EN.locale
- %User Temp%\inH{Random Numbers}\locale\ES.locale
- %User Temp%\inH{Random Numbers}\locale\FR.locale
- %User Temp%\inH{Random Numbers}\locale\ID.locale
- %User Temp%\inH{Random Numbers}\locale\IT.locale
- %User Temp%\inH{Random Numbers}\locale\JA.locale
- %User Temp%\inH{Random Numbers}\locale\KO.locale
- %User Temp%\inH{Random Numbers}\locale\NL.locale
- %User Temp%\inH{Random Numbers}\locale\NO.locale
- %User Temp%\inH{Random Numbers}\locale\PL.locale
- %User Temp%\inH{Random Numbers}\locale\PT.locale
- %User Temp%\inH{Random Numbers}\locale\RU.locale
- %User Temp%\inH{Random Numbers}\locale\SV.locale
- %User Temp%\inH{Random Numbers}\locale\TR.locale
- %User Temp%\inH{Random Numbers}\locale\ZH.locale
- %User Temp%\in43A9003C\{Random Numbers}.tmp
- %User Temp%\inH{Random Numbers}\bootstrap_{Random Numbers}.html
Step 8
Search and delete these folders
- %User Temp%\inH{Random Numbers}\css
- %User Temp%\inH{Random Numbers}\css\sdk-ui
- %User Temp%\inH{Random Numbers}\images
- %User Temp%\inH{Random Numbers}\locale
- %User Temp%\inH{Random Numbers}
- %User Temp%\in{Random Hex}
Step 9
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.InstallCore.MANHOCFH. 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 the following Trend Micro Support pages for more information:
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