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]
Techniques Used
| Domain | ID | Name | Use | |
|---|---|---|---|---|
| Enterprise | T1071 | .001 | Application Layer Protocol: Web Protocols |
GravityRAT uses HTTP for C2.[1] |
| Enterprise | T1059 | .003 | Command and Scripting Interpreter: 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] |
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| Enterprise | T1559 | .002 | Inter-Process Communication: 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 | .005 | Obfuscated Files or Information: 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] |
| .013 | Obfuscated Files or Information: Encrypted/Encoded File |
GravityRAT supports file encryption (AES with the key "lolomycin2017").[1] |
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| Enterprise | T1057 | Process Discovery |
GravityRAT lists the running processes on the system.[1] |
|
| Enterprise | T1053 | .005 | Scheduled Task/Job: 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] |
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| Enterprise | T1049 | System Network Connections Discovery |
GravityRAT uses the |
|
| 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] |
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| 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] |
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| Enterprise | T1497 | .001 | Virtualization/Sandbox Evasion: 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] |
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