MALWARE FAMILY💰 FINANCIALHIGH

surtr

Internal ID: win.surtr
1
aliases
Last seen:Mar 17, 2026

Intelligence Profile

According to PCrisk, Surtr is ransomware. Malware of this type encrypts files (and renames them) and generates a ransom note. Surtr appends the [email protected] email address and the ".SURT" extension to filenames.

Threat Analysis

surtr is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.

Financially motivated threat actors like surtr prioritize monetary gain through methods such as ransomware deployment, banking trojans, cryptocurrency theft, BEC scams, or credential harvesting for resale on underground markets.

With high sophistication, surtr is capable of targeted intrusions using adapted commodity tools alongside custom implants, maintaining operational security and evading standard detection mechanisms.

External References

Quick Facts

TypeMalware Family
Motivation💰 financial
Sophisticationhigh
Aliases1

Also Known As

win.surtr

Research Links

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.
surtr — Malware Family | Threat Intelligence | CTIWATCH.COM