Microsoft Digital Defense Report 2025: Data Exfiltration Is Now the Norm
Microsoft's 2025 Digital Defense Report, published October 16, 2025, emphasizes that attackers are not only encrypting data; they are stealing it for use in double-extortion attacks.
Data theft is the default outcome, not the exception
According to Microsoft, data theft was observed in the vast majority of the incidents investigated over the past year, and financial gain is now the primary motive behind intrusions, rather than espionage. Microsoft
Attackers now prioritize data exfiltration and use the threat of disclosure to demand payment. File encryption has become an optional measure for many ransomware groups.
Every stolen credential feeds the exfiltration pipeline
The report also identifies infostealer malware as a key driver of this shift. Stolen credentials, session tokens, and browser cookies allow attackers to access and move through company networks.
ByteJams Ranger stops malware that attempts to bypass App‑Bound Encryption in popular browsers such as Chrome and Edge. Learn more about infostealers and browser App‑Bound Encryption bypasses.
Why ByteJams Ranger is built around stopping exfiltration, not just encryption
ByteJams Ranger uses a patented, on‑device algorithm to detect ransomware encryption and unauthorized data exfiltration as related forms of malicious file activity. A single signatureless algorithm provides both protections:
- Blocks unauthorized file exfiltration to any destination while preserving legitimate cloud storage applications, so employees can continue their normal work.
- Zero-touch deployment: the algorithm runs on‑device without cloud dependency or ongoing configuration.
Data exfiltration remains a primary objective in financially motivated attacks. Microsoft's telemetry shows that data theft occurs in the vast majority of investigated incidents. ByteJams Ranger is designed to block unauthorized file transfers at the endpoint.
