PUA.Win32.Softcnapp.ASHKR
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 folders:
- %User Temp%\RarSFX0
(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 drops the following files:
- %User Temp%\RarSFX0\install.bat
- %User Temp%\RarSFX0\nopop.vbe
- %User Temp%\RarSFX0\AuditPlusSetup3.0.72C2.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 adds the following processes:
- "%System%\WScript.exe" "%User Temp%\RarSFX0\nopop.vbe"
- cmd /c ""C:\Users\dyituser_732\AppData\Local\Temp\RarSFX0\install.bat" /start"
- reg add HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook /v ExcludedImageNames /t REG_SZ /d AuditPlusSetup3.0.72C2.exe /f /reg:64
- reg add HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook /v ExcludedImageNames /t REG_SZ /d AuditPlusSetup3.0.72C2.exe /f
- reg add HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook64 /f
- reg add HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook64 /v ExcludedImageNames /t REG_SZ /d AuditPlusSetup3.0.72C2.exe /f
- AuditPlusSetup3.0.72C2.exe /S /ADDR=audit.cxmt.com:8080 /start=1
Other System Modifications
This Potentially Unwanted Application adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\
CtxHook
ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\
Citrix\CtxHook
ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\
Citrix\CtxHook64
ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
Other Details
This Potentially Unwanted Application adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\
CtxHook
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\
Citrix
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\
Citrix\CtxHook
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\
Citrix\CtxHook64
SOLUTION
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.XXPE50FSX020
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\Citrix\CtxHook
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook64
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
- ExcludedImageNames = AuditPlusSetup3.0.72C2.exe
Step 5
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\Citrix
- "" = ""
- "" = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook
- "" = ""
- "" = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix
- "" = ""
- "" = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook
- "" = ""
- "" = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Citrix\CtxHook64
- "" = ""
- "" = ""
Step 6
Search and delete this file
- %User Temp%\RarSFX0\install.bat
- %User Temp%\RarSFX0\nopop.vbe
- %User Temp%\RarSFX0\AuditPlusSetup3.0.72C2.exe
Step 7
Search and delete this folder
- %User Temp%\RarSFX0
Step 8
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.Softcnapp.ASHKR. 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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