JS_EXJAYSEE.SMA
Windows
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It modifies the user's Internet Explorer home page into a certain website. This action allows the malware to point to a website which may contain malware, putting the affected computer at greater risk of malware infection. It modifies the Internet Explorer Zone Settings.
TECHNICAL DETAILS
28,056 bytes
JS
No
24 Aug 2015
Arrival Details
This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Other System Modifications
This worm adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
JSEFile\DefaultIcon
{Default} = "%System%\imageres.dll,-72"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
JSEFile
FriendlyTypeName = "%System%\shell32.dll,-30596"
Propagation
This worm drops the following copy(ies) of itself in all removable drives:
- {Drive Letter}:\SAM_17122.JPG.jse
Web Browser Home Page and Search Page Modification
This worm modifies the user's Internet Explorer home page to the following websites:
- https://www.{BLOCKED}e.es/#output=search&sclient=psy-ab&q=fiverdolly+28056
It modifies the Internet Explorer Zone Settings.
SOLUTION
9.850
11.882.04
27 Aug 2015
11.883.00
28 Aug 2015
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_LOCAL_MACHINE\SOFTWARE\Classes\JSEFile\DefaultIcon
- {Default} = "%System%\imageres.dll,-72"
- {Default} = "%System%\imageres.dll,-72"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\JSEFile
- FriendlyTypeName = "%System%\shell32.dll,-30596"
- FriendlyTypeName = "%System%\shell32.dll,-30596"
Step 4
Search and delete these files
- {Drive Letter}:\SAM_17122.JPG.jse
Step 5
Reset the Internet Explorer Home and Search pages
Step 6
Reset Internet privacy settings
Step 7
Scan your computer with your Trend Micro product to delete files detected as JS_EXJAYSEE.SMA. 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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