Infostealers, also known as information-stealing malware, have been fueling cyber attacks at an unprecedented scale in 2025. Our analysts tracked a dramatic 800% increase in infostealer-driven credential theft, with over 1.8 billion corporate and personal accounts compromised.
The shift means enterprise attack surfaces have expanded beyond network infrastructure to digital identities of employees, partners, and customers. To defend against these threats, security teams need visibility into the illicit ecosystems where stolen logs are bought, sold, and weaponized.
Flashpoint created The Proactive Defender’s Guide to Infostealers, providing cybersecurity professionals with intelligence necessary to build a proactive defense. The guide offers:
* A breakdown of popular infostealer strains and tactics
* Strategies for managing identity attack surfaces
* Guidance on operationalizing infostealer intelligence for proactive defense
Infostealers have become a cornerstone of the modern cybercrime economy, operating under a low-cost, high-yield Malware-as-a-Service (MaaS) model. These tools are highly effective because they bundle exfiltrated data into logs, creating comprehensive target profiles that enable account takeovers and lateral movement.
To counter these threats, security teams need specialized and comprehensive threat intelligence. Flashpoint’s primary source collections provide the necessary insights to spot compromised accounts early, uncover infection trends, and act decisively before threat actors weaponize stolen credentials.
By leveraging infostealer intelligence, security teams can transform raw data into a robust defense and stay ahead of attackers. Download The Proactive Defender’s Guide to Infostealers today to learn more.
Source: https://flashpoint.io/blog/proactive-defender-guide-infostealers