PUA.Win32.DownloadAssistant.GF
Trojan.Win32.Ekstak.yqov (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows
![](/vinfo/imgFiles/legend.jpg)
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
2,676,071 bytes
EXE
Yes
19 Jan 2020
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 creates the following folders:
- %User Temp%\is-6S67F.tmp\_isetup
(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 keys:
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Owner = "x\x01\x00\x00\xa5\xc8^\x86?Y\xd5\x01"
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
SessionHash = "{random characters}"
HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Sequence = "1"
Dropping Routine
This Potentially Unwanted Application drops the following files:
- %User Temp%\is-6S67F.tmp\_isetup\_isdecmp.dll
- %User Temp%\is-6S67F.tmp\Non.exe
- %User Temp%\is-6S67F.tmp\_isetup\_shfoldr.dll
(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 Details
This Potentially Unwanted Application connects to the following possibly malicious URL:
- http://{BLOCKED}record.live/v2/events
This report is generated via an automated analysis system.
SOLUTION
9.850
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
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_CURRENT_USER\Software\Microsoft\RestartManager
- Session0000
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\RestartManager\Session0000
- Owner = "x\x01\x00\x00\xa5\xc8^\x86?Y\xd5\x01"
- In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- SessionHash = "{random characters}"
- In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
- Sequence = "1"
Step 4
Search and delete these components
- %User Temp%\is-6S67F.tmp\_isetup\_isdecmp.dll
- %User Temp%\is-6S67F.tmp\Non.exe
- %User Temp%\is-6S67F.tmp\_isetup\_shfoldr.dll
Step 5
Search and delete this folder
- %User Temp%\is-6S67F.tmp\_isetup
Step 6
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.DownloadAssistant.GF. 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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