Software: T9000

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ID S0098
Aliases T9000
Type Malware
Platform Windows

T9000 is a backdoor that is a newer variant of the T5000 malware family, also known as Plat1. Its primary function is to gather information about the victim. It has been used in multiple targeted attacks against U.S.-based organizations.12

Techniques Used

  • AppInit DLLs - If a victim meets certain criteria, T9000 uses the AppInit_DLL functionality to achieve persistence by ensuring that every user mode process that is spawned will load its malicious DLL, ResN32.dll. It does this by creating the following Registry keys: HKLM\Software\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs – %APPDATA%\Intel\ResN32.dll and HKLM\Software\Microsoft\Windows NT\CurrentVersion\Windows\LoadAppInit_DLLs – 0x1.2
  • DLL Side-Loading - During the T9000 installation process, it drops a copy of the legitimate Microsoft binary igfxtray.exe. The executable contains a side-loading weakness which is used to load a portion of the malware.2
  • System Information Discovery - T9000 gathers and beacons the operating system build number and CPU Architecture (32-bit/64-bit) during installation.2
  • System Owner/User Discovery - T9000 gathers and beacons the username of the logged in account during installation. It will also gather the username of running processes to determine if it is running as SYSTEM.2
  • Audio Capture - T9000 uses the Skype API to record audio and video calls. It writes encrypted data to %APPDATA%\Intel\Skype.2
  • Automated Collection - T9000 searches removable storage devices for files with a pre-defined list of file extensions (e.g. *.doc, *.ppt, *.xls, *.docx, *.pptx, *.xlsx). Any matching files are encrypted and written to a local user directory.2
  • Data Encrypted - T9000 encrypts collected data using a single byte XOR key.2
  • Screen Capture - T9000 can take screenshots of the desktop and target application windows, saving them to user directories as one byte XOR encrypted .dat files.2
  • Video Capture - T9000 uses the Skype API to record audio and video calls. It writes encrypted data to %APPDATA%\Intel\Skype.2