A WeChat worm demo took over iPhone and Android accounts through incoming calls from existing contacts; Calif says Tencent blocked the exploit.
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Hackers breach F5 BIG-IP APM devices to deploy Linux rootkit
A Linux rootkit targeting devices in F5 BIG-IP APM environments can intercept PHP file loading and inject a fileless web shell directly into memory, avoiding the need to write malicious code to disk.
The malware shows signs of being a second-stage payload that was likely deployed after exploiting CVE-2025–53521, a critical remote code execution (RCE) flaw that F5 Networks reclassified from a DoS problem in March.
Sophos researchers analyzed a sample and noted that, while it enables “on-demand server-side code execution” typically associated with webshells, it achieves this through “deeper Linux-and Apache-specific tradecraft.”
Super-resolution imaging reveals details inside living cells
A new fluorescence microscopy technique that generates super-resolution images from a single camera exposure could help researchers study rapid movements within cells that are difficult to capture with existing methods.
Super-resolution microscopy has transformed cell biology by allowing scientists to see cellular structures and details that are too small to be imaged clearly with conventional light microscopes. Some methods achieve super-resolution by combining information from hundreds or thousands of image frames taken over time.
However, this works best when biological samples like cells or tissues have been fixed, or preserved with chemicals. Otherwise, structures like mitochondria, microtubules and DNA—which are constantly moving, changing and interacting—appear blurry using existing super-resolution techniques.
