Trojan.MSIL.FRS.VSNW0BK24
Virus.MSIL.Tufantle, Virus.MSIL.Tufantle (IKARUS)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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 Trojan 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 Trojan adds the following folders:
- If -o | --output parameter is used:
- {Path Set by the User}\EyeWitness_{Date}_{Time}
- {Path Set by the User}\EyeWitness_{Date}_{Time}\headers
- {Path Set by the User}\EyeWitness_{Date}_{Time}\images
- {Path Set by the User}\EyeWitness_{Date}_{Time}\src
Otherwise:- %Application Data%\EyeWitness_{Date}_{Time}
- %Application Data%\EyeWitness_{Date}_{Time}\headers
- %Application Data%\EyeWitness_{Date}_{Time}\images
- %Application Data%\EyeWitness_{Date}_{Time}\src
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It drops the following files:
- If -o | --output parameter is used:
- {Path Set by the User}\EyeWitness_{Date}_{Time}\headers\{URL Accessed}.txt → contains the HTTP response headers from the captured webpage
- {Path Set by the User}\EyeWitness_{Date}_{Time}\images\{URL Accessed}.bmp → contains screenshot of the webpage as rendered by EyeWitness
- {Path Set by the User}\EyeWitness_{Date}_{Time}\src\{URL Accessed}.txt → contains the full HTML, JavaScript, and CSS source code of the webpage
- {Path Set by the User}\EyeWitness_{Date}_{Time}\report_page1.html → contains the generated report, showing details of the web request, HTTP headers, source code, and a screenshot of the captured webpage
Otherwise:- %Application Data%\EyeWitness_{Date}_{Time}\headers\{URL Accessed}.txt
- %Application Data%\EyeWitness_{Date}_{Time}\images\{URL Accessed}.bmp
- %Application Data%\EyeWitness_{Date}_{Time}\src\{URL Accessed}.txt
- %Application Data%\EyeWitness_{Date}_{Time}\report_page1.html
- It compresses the above files into the following if -c | --compress parameter is used:
- {Path Set by the User}\EyeWitness_{Date}_{Time}.zip or
- %Application Data%\EyeWitness_{Date}_{Time}.zip
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Other Details
This Trojan does the following:
- It captures screenshots of web pages, analyzing HTTP responses, and generating reports for reconnaissance and security assessments.
- It uses the following version of EyeWitness:
- EyeWitness v1.1
It accepts the following parameters:
- -b | --bookmarks → Searches for bookmark files for IE/Chrome, parses them, and adds them to the list of screenshot URLs
- -f | --file → Specify a new-line separated file of URLs
- -i | --cidr → Specify an IP CIDR
- -o | --output → Specify an output directory (one will be created if non-existent)
- -d | --delay → (Default: 30) Specify a delay to use before cancelling a single URL request
- -c | --compress → (Default: false) Compress output directory
- --http → (Default: false) Prepend http:// to all URLs
- --https → (Default: false) Prepend https:// to all URLs
- --help → Display this help screen.
- --version → Display version information.
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.XXPE50FFF086
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
Search and delete these files
- {Path Set by the User}\EyeWitness_{Date}_{Time}\headers\{URL Accessed}.txt
- {Path Set by the User}\EyeWitness_{Date}_{Time}\images\{URL Accessed}.bmp
- {Path Set by the User}\EyeWitness_{Date}_{Time}\src\{URL Accessed}.txt
- {Path Set by the User}\EyeWitness_{Date}_{Time}\report_page1.html
or - %Application Data%\EyeWitness_{Date}_{Time}\headers\{URL Accessed}.txt
- %Application Data%\EyeWitness_{Date}_{Time}\images\{URL Accessed}.bmp
- %Application Data%\EyeWitness_{Date}_{Time}\src\{URL Accessed}.txt
- %Application Data%\EyeWitness_{Date}_{Time}\report_page1.html
or - {Path Set by the User}\EyeWitness_{Date}_{Time}.zip or
- %Application Data%\EyeWitness_{Date}_{Time}.zip
Step 5
Search and delete these folders
- {Path Set by the User}\EyeWitness_{Date}_{Time}\src
- {Path Set by the User}\EyeWitness_{Date}_{Time}\images
- {Path Set by the User}\EyeWitness_{Date}_{Time}\headers
- {Path Set by the User}\EyeWitness_{Date}_{Time}
or - %Application Data%\EyeWitness_{Date}_{Time}\src
- %Application Data%\EyeWitness_{Date}_{Time}\images
- %Application Data%\EyeWitness_{Date}_{Time}\headers
- %Application Data%\EyeWitness_{Date}_{Time}
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.MSIL.FRS.VSNW0BK24. 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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