Windows
This information stealing malware was one of the IoCs found in recent attacks targeting hospitals in Israel. This malware is also notable for its stealth. It terminates itself after detecting anti-virus products, script file names, analysis, forensics, and debugging tools, as well as sandboxes and virtual machines.
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 executes commands from a remote malicious user, effectively compromising the affected system.
It steals system information. It retrieves specific information from the affected system. It logs a user's keystrokes to steal information.
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.
Installation
This Worm drops the following component file(s):
It drops the following copies of itself into the affected system:
It creates the following folders:
Autostart Technique
This Worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WinddowsUpdater = "C:\WinddowsUpdater\WinddowsUpdater.exe C:\WinddowsUpdater\WinddowsUpdater.zip"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WinddowsUpdate = "C:\WinddowsUpdater\WinddowsUpdater.exe C:\WinddowsUpdater\WinddowsUpdater.zip"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
WinddowsUpdater = "C:\WinddowsUpdater\WinddowsUpdater.exe C:\WinddowsUpdater\WinddowsUpdater.zip"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
WinddowsUpdate = "C:\WinddowsUpdater\WinddowsUpdater.exe C:\WinddowsUpdater\WinddowsUpdater.zip"
It drops the following file(s) in the Windows Common Startup folder to enable its automatic execution at every system startup:
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows XP, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other System Modifications
This Worm deletes the following files:
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows XP, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = 0
Backdoor Routine
This Worm executes the following commands from a remote malicious user:
It connects to the following URL(s) to send and receive commands from a remote malicious user:
Dropping Routine
This Worm drops the following file(s), which it uses for its keylogging routine:
Information Theft
This Worm steals system information.
It retrieves the following information from the affected system:
It logs a user's keystrokes to steal information.
NOTES:
Anti-analysis Techniques
It checks the existence of AV products and analysis tools:
Checks script filenames if containing the strings below, and must not have length greater than 35:
Checks folder where it is being executed:
Checks if the following folders exist:
Checks Virtual Machines:
If any of the above are confirmed, the script will not continue.
Propagation
It drops copies of itself in all drives:
It drops the following shortcut files in all removable drives:
It also drops copies of itself inside the existing folders on removable drives
Backdoor Commands
It is capable of the following commands:
If the backdoor command contains "GoTorat", it may perform the following commands:
If the backdoor command contains "radbot", it may perform the following commands:
It checks for the presence of the following files:
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
Identify and terminate files detected as WORM_RETADUP.A
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.
Step 5
Search and delete these folders
Step 6
Search and delete this file
Step 7
Scan your computer with your Trend Micro product to delete files detected as WORM_RETADUP.A. 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:
Step 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.