US-CERT TYPEFRAME June 2018

TYPEFRAME can install and store encrypted configuration data under the Registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellCompatibility\Applications\laxhost.dll and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PrintConfigs.

APIs and strings in some TYPEFRAME variants are RC4 encrypted. Another variant is encoded with XOR.

TYPEFRAME can uninstall malware components using a batch script. TYPEFRAME can execute commands using a shell.

TYPEFRAME has used a malicious Word document for delivery with VBA macros for execution.

TYPEFRAME can delete files off the system.

TYPEFRAME can search directories for files on the victim’s machine.

A TYPEFRAME variant can force the compromised system to function as a proxy server.

TYPEFRAME can upload and download files to the victim’s machine.

TYPEFRAME can install encrypted configuration data under the Registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellCompatibility\Applications\laxhost.dll and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PrintConfigs.

One TYPEFRAME variant decrypts an archive using an RC4 key, then decompresses and installs the decrypted malicious DLL module. Another variant decodes the embedded file by XORing it with the value "0x35".

A Word document delivering TYPEFRAME prompts the user to enable macro execution.

TYPEFRAME variants can add malicious DLL modules as new services.TYPEFRAME can also delete services from the victim’s machine.

TYPEFRAME has used ports 443, 8080, and 8443 with a FakeTLS method.

TYPEFRAME can gather the disk volume information.

TYPEFRAME can open the Windows Firewall on the victim’s machine to allow incoming connections.