Pronsis Loader

Internal ID: jar.pronsis_loader

aliases

Last seen:Mar 17, 2026

Intelligence Profile

According to TrustWave, this is a loader leveraging JPHP, which was observed fetching Latrodectus and Lumma.

Threat Analysis

Pronsis Loader is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.

External References

→https://cloud.google.com/blog/topics/threat-intelligence/russian-espionage-influence-ukrainian-military-recruits-anti-mobilization-narratives

→https://cloud.google.com/blog/topics/threat-intelligence/russian-espionage-influence-ukrainian-military-recruits-anti-mobilization-narratives?hl=en

→https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/pronsis-loader-a-jphp-driven-malware-diverging-from-d3fck-loader/

Quick Facts

TypeAPT / Threat Group

Aliases1

Also Known As

jar.pronsis_loader

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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