StealC and Amadey: Breaking down infostealers and the cybercrime services that deliver them

Microsoft's Digital Crimes Unit (DCU) has executed a significant takedown operation against the infrastructure supporting the StealC and Amadey infostealers. This action involved disrupting critical domains used by these pervasive cybercrime services. The full blog post promises a deep technical dive into their functionality.

• Threat: StealC and Amadey are active infostealers used in widespread cybercrime campaigns to exfiltrate sensitive user data.
• Takedown: Microsoft's DCU facilitated the takedown, suspension, and blocking of domains that formed the core C2 infrastructure for these infostealers.
• Note: While the summary highlights a technical breakdown, specific IOCs (IPs, hashes) and detailed TTPs (MITRE ATT&CK) are not provided in this abstract but would be expected in the full article.

Defense: Proactive defense against such infostealers requires robust endpoint detection and response (EDR) solutions, vigilant network monitoring for suspicious C2 activity, and regular security awareness training to educate users on phishing and malicious downloads.

Source: https://www.microsoft.com/en-us/security/blog/2026/06/24/stealc-and-amadey-breaking-down-infostealers-and-the-cybercrime-services-that-deliver-them/