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Summary
67% of the malware downloads Netskope blocks come from popular cloud applications being abused by attackers. One of the services commonly abused by threat actors is Discord, which is abused to host malware such as TroubleGrabber using public attachment URLs.
In this blog post, we will analyze a recent DBatLoader (a.k.a. ModiLoader) sample that uses this technique on Discord to deliver a malware known as Warzone (a.k.a. Ave Maria), a Remote Access Trojan created in 2018.
This malware is actively being sold on the internet, through a dedicated website:
It offers a long list of capabilities, such as:
- Remote Desktop
- WebCam Live Stream
- Download/Upload Files
- Password Grabber (Chrome, Firefox, Internet Explorer, Edge, Outlook, etc.)
- Offline/Online Keylogger
The malware is being sold under many prices, depending on the selected plan:
The website even includes a knowledge base that contains information about the usage of Warzone RAT.
Analysis
It all starts with the first stage of DBatLoader, which is known for abusing cloud services, like Google Drive and Discord, to retrieve its second stage, both of which are developed in Delphi.
The sample is signed with a revoked certificate from “Afia Wave Enterprises”.
Once running, the malware allocates and executes a shellcode, which is responsible for downloading the second stage.