Guillaume Valadon

Guillaume Valadon

Guillaume is a Cybersecurity Researcher at GitGuardian. He holds a PhD in networking. He likes looking at data and crafting packets. He co-maintains Scapy. And he still remembers what AT+MS=V34 means!

Paris
6 posts
The Ultralytics Supply Chain Attack: Connecting the Dots with GitGuardian’s Public Monitoring Data

The Ultralytics Supply Chain Attack: Connecting the Dots with GitGuardian’s Public Monitoring Data

On December 4, 2024, the Ultralytics Python module was backdoored to deploy a cryptominer. Using GitGuardian’s data, we reconstructed deleted commits, connecting the dots with the initial analysis. This investigation highlights the value of GitGuardian’s data in understanding supply chain attacks.

Docker Zombie Layers: Why Deleted Layers Can Still Haunt You

Docker Zombie Layers: Why Deleted Layers Can Still Haunt You

Docker Zombie Layers are unreferenced image layers that continue to exist for weeks in registries, even after being removed from a manifest. In this hands-on deep dive, we explore how these layers can persist in registries and why ensuring the immediate revocation of exposed secrets is critical.

How Popular Malware Is Stealing Credentials and What You Can Do About It

How Popular Malware Is Stealing Credentials and What You Can Do About It

Credentials are prime targets for attackers, as they make it easy to access resources as legitimate users without discovering vulnerabilities or using technical exploits. Malware authors know how interesting these low-hanging fruits are and are coming after your secrets!

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