PUA.Win32.InstallCore.AK
HEUR:AdWare.Win32.Generic (Kaspersky)
Windows

Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
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 adds the following processes:
- "%User Temp%\is-6JEHD.tmp\8bbf8a007365253a75c1262720750b3379f4121f.tmp" /SL5="$A0244,1329267,146432,%User Temp%\8bbf8a007365253a75c1262720750b3379f4121f.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(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 creates the following folders:
- %Program Files%\Nine
- %User Temp%\is-3D432.tmp\_isetup
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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 keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Owner = "0\x06\x00\x00\xd04\x8a89W\xd5\x01"
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
SessionHash = "\xe8\x93\x9d\x00\x94l]\xc5W\xfc\xb9S\x95\xf0\x9c\xe85~\xee;7sB\x02IH\xc6\x04k\x11r"
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Sequence = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
Inno Setup: Setup Version = "5.5.6 (u)"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
Inno Setup: App Path = "%Program Files%\Nine"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
InstallLocation = "%Program Files%\Nine"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
Inno Setup: Icon Group = "Nine"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
Inno Setup: User = "PEWPEWPEW"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
Inno Setup: Language = "default"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
DisplayName = "Nine version 5.7"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
UninstallString = "%Program Files%\Nine\unins000.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
QuietUninstallString = "%Program Files%\Nine\unins000.exe /SILENT"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
DisplayVersion = "5.7"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
NoModify = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
NoRepair = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
InstallDate = "20190820"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
MajorVersion = "5"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
MinorVersion = "7"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Nine_is1
EstimatedSize = "1156"
Dropping Routine
This Potentially Unwanted Application drops the following files:
- %User Temp%\is-3D432.tmp\_isetup\_shfoldr.dll
- %Program Files%\Nine\is-LU74T.tmp
- %Program Files%\Nine\Hebubol.sdf
- %Program Files%\Nine\is-9FRO9.tmp
- %Program Files%\Nine\is-GQVP7.tmp
- %Program Files%\Nine\Dudusopog.mp3
- %Program Files%\Nine\unins000.dat
- %Program Files%\Nine\Norohusad.h
- %Program Files%\Nine\is-ET5Q6.tmp
- %Program Files%\Nine\is-HA3JS.tmp
- %Program Files%\Nine\unins000.exe
- %Program Files%\Nine\Nolefiki.wav
(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).. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)
SOLUTION
Step 1
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 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 PUA.Win32.InstallCore.AK
- 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 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\Windows\CurrentVersion\Uninstall\Nine_is1
- (null)
- (null)
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\RestartManager\Session0000
- Owner = 0\x06\x00\x00\xd04\x8a89W\xd5\x01
- In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- SessionHash = \xe8\x93\x9d\x00\x94l]\xc5W\xfc\xb9S\x95\xf0\x9c\xe85~\xee;7sB\x02IH\xc6\x04k\x11r
- In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- Sequence = 1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- Inno Setup: Setup Version = 5.5.6 (u)
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- Inno Setup: App Path = %Program Files%\Nine
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- InstallLocation = %Program Files%\Nine
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- Inno Setup: Icon Group = Nine
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- Inno Setup: User = PEWPEWPEW
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- Inno Setup: Language = default
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- DisplayName = Nine version 5.7
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- UninstallString = %Program Files%\Nine\unins000.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- QuietUninstallString = %Program Files%\Nine\unins000.exe /SILENT
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- DisplayVersion = 5.7
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- NoModify = 1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- NoRepair = 1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- InstallDate = 20190820
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- MajorVersion = 5
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- MinorVersion = 7
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Nine_is1
- EstimatedSize = 1156
Step 6
Search and delete these components
- %User Temp%\is-3D432.tmp\_isetup\_shfoldr.dll
- %Program Files%\Nine\is-LU74T.tmp
- %Program Files%\Nine\Hebubol.sdf
- %Program Files%\Nine\is-9FRO9.tmp
- %Program Files%\Nine\is-GQVP7.tmp
- %Program Files%\Nine\Dudusopog.mp3
- %Program Files%\Nine\unins000.dat
- %Program Files%\Nine\Norohusad.h
- %Program Files%\Nine\is-ET5Q6.tmp
- %Program Files%\Nine\is-HA3JS.tmp
- %Program Files%\Nine\unins000.exe
- %Program Files%\Nine\Nolefiki.wav
Step 7
Search and delete these folders
- %Program Files%\Nine
- %User Temp%\is-3D432.tmp\_isetup
Step 8
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.InstallCore.AK. 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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