Key Takeaways
- Microsoft and Japan's National Police Agency dismantled a scam marketplace.
- The network sent over a billion malicious messages targeting 75,000 organizations.
- YAM Store, CoGUI, and Iron Man were key components of the scam operation.
Microsoft has collaborated with Japan's National Police Agency to dismantle a significant cybercrime network that has been sending over a billion scam messages globally. The operation targeted a marketplace called YAM Store, which facilitated the distribution of two phishing kits, CoGUI and Iron Man.
According to Microsoft, since January 2026, the network has been responsible for sending more than 750 million messages, primarily targeting organizations, with the remaining messages directed at individuals.
The collaboration between Microsoft and the Japanese authorities has resulted in the shutdown of the scam network, significantly reducing the volume of fraudulent messages that users might encounter.
The dismantling of this network is a significant step in the ongoing fight against cybercrime, particularly in the realm of phishing and scam operations. By targeting the core infrastructure of the scam network, Microsoft and its partners have made it more difficult for scammers to operate.
The success of this operation highlights the importance of international cooperation in addressing global cyber threats. By pooling resources and expertise, law enforcement and tech companies can more effectively combat cybercrime and protect users from malicious activities.
While the immediate impact of this takedown is significant, the threat of cybercrime remains a persistent challenge. Ongoing vigilance and continued collaboration between tech companies and law enforcement agencies are crucial in maintaining cybersecurity.
The shutdown of YAM Store, CoGUI, and Iron Man marks a major victory in the battle against cybercrime, but the fight is far from over. Users are advised to remain vigilant and report any suspicious messages to relevant authorities.





