Tracing a Multi-Vector Malware Campaign: From VBS to Open Infrastructure

When a suspicious VBS file was blocked in a customer environment, LevelBlue’s Managed Detection and Response team launched an investigation.

What appeared contained wasn’t.

That single alert led to the discovery of a broader malware campaign built on reusable infrastructure and multiple delivery paths; designed to persist beyond detection.

Deeper analysis from the LevelBlue SpiderLabs team revealed how attackers reused the same infrastructure to distribute different malware families, rotating delivery methods to evade controls. Block one path, and another remains active; supported by open directories, staged payloads, and a modular execution flow.

In this technical threat briefing, our experts walk through the investigation from initial detection to full infrastructure mapping. Using real MDR findings, you’ll see how one alert exposed a larger campaign; and how to identify similar patterns earlier in your own environment.