Webworm Deploys EchoCreep and GraphWorm Backdoors Using Discord and MS Graph API

Cybersecurity researchers have flagged fresh activity from a China-aligned threat actor known as Webworm in 2025, deploying custom backdoors that employ Discord and Microsoft Graph API for command-and-control C2 or C&C communications. Webworm, first publicly documented by Broadcom-owned Symantec ...

TAG-150 Develops CastleRAT in Python and C, Expanding CastleLoader Malware Operations

The threat actor behind the malware-as-a-service MaaS framework and loader called CastleLoader has also developed a remote access trojan known as CastleRAT. "Available in both Python and C variants, CastleRAT's core functionality consists of collecting system information, downloading and executin...