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S0237 GravityRAT

GravityRAT is a remote access tool (RAT) and has been in ongoing development since 2016. The actor behind the tool remains unknown, but two usernames have been recovered that link to the author, which are “TheMartian” and “The Invincible.” According to the National Computer Emergency Response Team (CERT) of India, the malware has been identified in attacks against organization and entities in India. 1

Item Value
ID S0237
Associated Names
Type MALWARE
Version 1.2
Created 17 October 2018
Last Modified 30 March 2020
Navigation Layer View In ATT&CK® Navigator

Techniques Used

Domain ID Name Use
enterprise T1071 Application Layer Protocol -
enterprise T1071.001 Web Protocols GravityRAT uses HTTP for C2.1
enterprise T1059 Command and Scripting Interpreter -
enterprise T1059.003 Windows Command Shell GravityRAT executes commands remotely on the infected host.1
enterprise T1005 Data from Local System GravityRAT steals files with the following extensions: .docx, .doc, .pptx, .ppt, .xlsx, .xls, .rtf, and .pdf.1
enterprise T1025 Data from Removable Media GravityRAT steals files based on an extension list if a USB drive is connected to the system.1
enterprise T1083 File and Directory Discovery GravityRAT collects the volumes mapped on the system, and also steals files with the following extensions: .docx, .doc, .pptx, .ppt, .xlsx, .xls, .rtf, and .pdf.1
enterprise T1559 Inter-Process Communication -
enterprise T1559.002 Dynamic Data Exchange GravityRAT has been delivered via Word documents using DDE for execution.1
enterprise T1571 Non-Standard Port GravityRAT has used HTTP over a non-standard port, such as TCP port 46769.1
enterprise T1027 Obfuscated Files or Information GravityRAT supports file encryption (AES with the key “lolomycin2017”).1
enterprise T1027.005 Indicator Removal from Tools The author of GravityRAT submitted samples to VirusTotal for testing, showing that the author modified the code to try to hide the DDE object in a different part of the document.1
enterprise T1057 Process Discovery GravityRAT lists the running processes on the system.1
enterprise T1053 Scheduled Task/Job -
enterprise T1053.005 Scheduled Task GravityRAT creates a scheduled task to ensure it is re-executed everyday.1
enterprise T1082 System Information Discovery GravityRAT collects the MAC address, computer name, and CPU information.1
enterprise T1016 System Network Configuration Discovery GravityRAT collects the victim IP address, MAC address, as well as the victim account domain name.1
enterprise T1049 System Network Connections Discovery GravityRAT uses the netstat command to find open ports on the victim’s machine.1
enterprise T1033 System Owner/User Discovery GravityRAT collects the victim username along with other account information (account type, description, full name, SID and status).1
enterprise T1007 System Service Discovery GravityRAT has a feature to list the available services on the system.1
enterprise T1124 System Time Discovery GravityRAT can obtain the date and time of a system.1
enterprise T1497 Virtualization/Sandbox Evasion -
enterprise T1497.001 System Checks GravityRAT uses WMI to check the BIOS and manufacturer information for strings like “VMWare”, “Virtual”, and “XEN” and another WMI request to get the current temperature of the hardware to determine if it’s a virtual machine environment. 1
enterprise T1047 Windows Management Instrumentation GravityRAT collects various information via WMI requests, including CPU information in the Win32_Processor entry (Processor ID, Name, Manufacturer and the clock speed).1

References

  1. Mercer, W., Rascagneres, P. (2018, April 26). GravityRAT - The Two-Year Evolution Of An APT Targeting India. Retrieved May 16, 2018. ↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩