Infostealer Malware Compromised Over 1 Million Banking Accounts in 2025

More than one million online banking accounts were compromised by infostealers last year, as financial cyberthreats shifted toward credential theft and data reuse.

According to a Kaspersky report, attackers are moving away from traditional PC banking malware and increasingly relying on social engineering and dark web marketplaces, while mobile financial malware continues to grow.

Traditional financial phishing has not gone away. Pages that mimicked e-shops dominated the financial phishing landscape (48.5% in 2025, up 10.3% from 2024), followed by banks (26.1% in 2025, down by 16.5% from 2024) and payment systems (25.5% in 2025, up by 6.2% from 2024).

The decline in bank phishing may suggest that these services are becoming increasingly difficult to successfully impersonate, and fraudsters are turning to easier ways to access users’ finances.

Attackers are adapting campaigns to regional digital habits. In the Middle East, financial phishing is overwhelmingly concentrated on e-commerce (85.8%), indicating a heavy reliance on online retail lures, whereas in Africa bank-related phishing leads (53.75%), which may indicate that user account security there is still insufficient.

Latin America shows a more balanced distribution but with a higher share of e-commerce and bank targeting, while APAC and Europe display a more even spread across all three categories, pointing to diversified attack strategies.

The distribution of detections of financial phishing pages by category (banks/online stores/payment systems), globally and per region, 2025 | Credit: Kaspersky

In 2025, the decline in users affected by financial PC malware continued as users increasingly rely on mobile devices to manage their finances.

Contrary to PC banking malware, mobile banker attacks grew by 1.5 times in 2025 compared to the previous year.

Complementing traditional financial malware, infostealers played a significant role in enabling financial crime both on PCs and mobile devices by harvesting login credentials, cookies, bank card numbers, crypto wallet seed phrases, and autofill data from browsers and applications, which attackers then used for account takeovers or direct banking fraud.

Kaspersky data pointed to a surge in infostealer detections (up by 59% globally, 53% in Africa and 26% in the Middle East, on PCs from 2024 to 2025), fueling credential-based attacks.

According to Kaspersky Digital Footprint Intelligence (DFI), in 2025 over one million online banking accounts served by the world’s 100 largest banks fell victim to infostealers: credentials for these accounts were being freely shared on the dark web.

The countries with the highest median number of compromised accounts per bank were India, Spain, and Brazil.

74% of payment cards that were compromised by infostealer malware, published on dark web resources and identified by Kaspersky DFI team in 2025, remained valid as of March 2026.

This means that attackers could still use cards that had been stolen months or even years prior.

“The dark web has become a central hub for financial cybercrime. Stolen credentials and bank cards that have been harvested by infostealers are aggregated, repackaged, and sold there, while phishing kits targeted at users of financial products are offered as ready-to-use services. This creates a self-sustaining ecosystem where data theft and fraud operations reinforce each other, making attacks scalable and easy to carry out by fraudsters with minimal experience. Breaking this cycle requires proactive threat intelligence on the part of organisations, and increased awareness and scrutiny from individual users,” comments Polina Tretyak, Kaspersky digital footprint intelligence analyst.

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