Installation
This threat can create files on your PC, including:
It can make various registry changes during its installation, including:
In subkey: HKLM\Software\Classes\CLSID\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\InProcServer32
Sets value: "(default)"
With data: "%ProgramFiles%\winrar\rarext.dll"
In subkey: HKLM\Software\RegisteredApplications
Sets value: "WinRAR"
With data: "software\winrar\capabilities"
In subkey: HKLM\Software\WinRAR\Capabilities\FileAssociations
Sets value: ".001"
With data: "winrar"
Sets value: ".7z"
With data: "winrar"
Sets value: ".arj"
With data: "winrar"
Sets value: ".bz2"
With data: "winrar"
Sets value: ".rar"
With data: "winrar"
Sets value: ".xz"
With data: "winrar"
Sets value: ".zip"
With data: "winrar.zip"
In subkey: HKLM\Software\WinRAR
Sets value: "exe32"
With data: "%ProgramFiles%\winrar\winrar.exe"
It modifies the registry so that it runs each time you start your PC. For example:
In subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Sets value: "Nvdia"
With data: ""c:\users\admini~1\appdata\local\temp\sega\nvvscv.exe" "
The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.
Payload
Allows backdoor access and control
This threat can give a malicious hacker access and control of your PC. They can then perform a number of different actions, such as:
- Deleting files
- Downloading and running files
- Logging your keystrokes or stealing your sensitive data
- Modifying your system settings
- Running or stopping applications
- Spreading malware to other PCs
- Uploading files
Connects to a remote host
We have seen this threat connect to a remote host, including:
- myrappid.com using port 443
Malware can connect to a remote host to do any of the following:
- Check for an Internet connection
- Download and run files (including updates or other malware)
- Report a new infection to its author
- Receive configuration or other data
- Receive instructions from a malicious hacker
- Search for your PC location
- Upload information taken from your PC
- Validate a digital certificate
Creates an uninstaller
This threat can create an uninstaller by modifying the registry. For example:
In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\WinRAR archiver
Sets value: "DisplayIcon"
With data: "%ProgramFiles%\winrar\winrar.exe"
Sets value: "DisplayName"
With data: "winrar 5.31 (32-bit)"
Sets value: "DisplayVersion"
With data: "5.31.0"
Sets value: "InstallLocation"
With data: "%ProgramFiles%\winrar\"
Sets value: "Language"
With data: "0x00000000"
Sets value: "NoModify"
With data: "0x00000001"
Sets value: "NoRepair"
With data: "0x00000001"
Sets value: "Publisher"
With data: "win.rar gmbh"
Sets value: "UninstallString"
With data: "%ProgramFiles%\winrar\uninstall.exe"
Sets value: "VersionMajor"
With data: "0x00000005"
Sets value: "VersionMinor"
With data: "0x0000001f"
Additional information
Creates a mutex
This threat can create one or more mutexes on your PC. For example:
- {C20CD437-BA6D-4ebb-B190-70B43DE3B0F3}
- ms_com_hzyf_microsoft_app_com_1.0
It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.
This malware description was published using automated analysis of file SHA1 4dc2b2ed4b20ec71fcddb5cc6293abdd974e2c21.
