PUA.Win32.OfferCast.GA
WebToolbar.Win32.Asparnet.gen (Kaspersky) , Riskware/Asparnet (Fortinet)
Windows
Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Potentially Unwanted Application may be manually installed by a user.
TECHNICAL DETAILS
1,276,912 bytes
EXE
No
28 Jul 2016
Arrival Details
This Potentially Unwanted Application may be manually installed by a user.
Installation
This Potentially Unwanted Application drops the following files:
- %User Temp%\oc_{Random Num}.tmp
- %User Temp%\oc_{Random Num}\OCDLL.dll
- %User Temp%\oc_{Random Num}\IEOS.dll
- %User Temp%\oc_{Random Num}\Start.htm
- %User Temp%\oc_{Random Num}\apnanalytic.js
- %User Temp%\oc_{Random Num}\download.htm
- %User Temp%\oc_{Random Num}\embeddownload.htm
- %User Temp%\oc_{Random Num}\embedmasterrule.js
- %User Temp%\oc_{Random Num}\embedoffer2xtemplate.htm
- %User Temp%\oc_{Random Num}\embedorchestrator.htm
- %User Temp%\oc_{Random Num}\images\CRexpress.png
- %User Temp%\oc_{Random Num}\images\CRPrimary345.png
- %User Temp%\oc_{Random Num}\images\CRSatexpress.png
- %User Temp%\oc_{Random Num}\images\CRSaturation4.png
- %User Temp%\oc_{Random Num}\images\FFexpress.png
- %User Temp%\oc_{Random Num}\images\FFPrimary345.png
- %User Temp%\oc_{Random Num}\images\FFSatexpress.png
- %User Temp%\oc_{Random Num}\images\FFSaturation4.png
- %User Temp%\oc_{Random Num}\images\IEexpress.png
- %User Temp%\oc_{Random Num}\images\IEPrimary345.png
- %User Temp%\oc_{Random Num}\images\IESatexpress.png
- %User Temp%\oc_{Random Num}\images\IESaturation4.png
- %User Temp%\oc_{Random Num}\masterrule.js
- %User Temp%\oc_{Random Num}\ocerror.js
- %User Temp%\oc_{Random Num}\offer2xtemplate.htm
- %User Temp%\oc_{Random Num}\offerlist.js
- %User Temp%\oc_{Random Num}\orchestrator.htm
- %User Temp%\oc_{Random Num}\prefetch.htm
- %User Temp%\oc_{Random Num}\progress.htm
- %User Temp%\oc_{Random Num}\reboot.htm
- %User Temp%\oc_{Random Num}\scrolltext.xml
- %User Temp%\oc_{Random Num}\wait_animation.gif
- %User Temp%\oc_{Random Num}.tmp
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\YEFGVF95\orchestrator[1].htm
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\NVUI4L47\masterrule[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\7KZJEKTK\apnanalytic[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offerlist[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offerlist[2].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offer2xtemplate[1].htm
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\YEFGVF95\Server[1].jhtml
- %User Profile%\Documents\APNSetup.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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.)
It creates the following folders:
- %User Temp%\oc_{Random Num}
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
Other System Modifications
This Potentially Unwanted Application adds the following registry entries:
HKCU\Software\Microsoft\
Windows Script\Settings
JITDebug = 0
Other Details
This Potentially Unwanted Application connects to the following possibly malicious URL:
- ak.pipoffers.{BLOCKED}tners.com
- pipoffers.{BLOCKED}tners.com
- offers.{BLOCKED}ast.com
- apnmedia.{BLOCKED}k.com
SOLUTION
9.850
2.111.00
18 Oct 2018
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
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 Script\Settings
- JITDebug = 0
- JITDebug = 0
Step 4
Search and delete these folders
- %User Temp%\oc_{Random Num}
Step 5
Search and delete this file
- %User Temp%\oc_{Random Num}.tmp
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\YEFGVF95\orchestrator[1].htm
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\NVUI4L47\masterrule[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\7KZJEKTK\apnanalytic[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offerlist[1].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offerlist[2].js
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\BL7GWO8U\offer2xtemplate[1].htm
- %AppDataLocal%\Microsoft\Windows\Temporary Internet Files\Content.IE5\YEFGVF95\Server[1].jhtml
- %User Profile%\Documents\APNSetup.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.OfferCast.GA. 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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