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300% Increase In Malicious JARs

ID: 897bc812-9986-5eba-836a-16e38c31096c

STIX ID: report--897bc812-9986-5eba-836a-16e38c31096c

Feed Name: Zscaler Security Research Blog

Threat Score
30/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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The report highlights a trend of increasing malicious Java Archive (JAR) files being observed and blocked, noting use in exploit kits and techniques such as obfuscation and Java Web Start/Applet-related vulnerabilities (citing CVEs and Metasploit references). It is an observational alert rather than a detailed incident report and lacks specific indicators or impact metrics.

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