Blister

Internal ID: win.blister

aliases

Last seen:Mar 17, 2026

Intelligence Profile

Elastic observed this loader coming with valid code signatures, being used to deploy secondary payloads in-memory.

Threat Analysis

Blister 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.

External References

→https://blog.fox-it.com/2023/11/01/popping-blisters-for-research-an-overview-of-past-payloads-and-exploring-recent-developments/

→https://cloudsek.com/technical-analysis-of-code-signed-blister-malware-campaign-part-1/

→https://cloudsek.com/technical-analysis-of-code-signed-blister-malware-campaign-part-2/

→https://elastic.github.io/security-research/malware/2022/05/02.blister/article/

→https://killingthebear.jorgetesta.tech/actors/evil-corp

→https://medium.com/walmartglobaltech/socgholish-campaigns-and-initial-access-kit-4c4283fea8ee

→https://redcanary.com/blog/intelligence-insights-january-2022/

→https://security-labs.elastic.co/security-labs/revisiting-blister-new-developments-of-the-blister-loader

→https://twitter.com/MsftSecIntel/status/1522690116979855360

→https://www.elastic.co/blog/elastic-security-uncovers-blister-malware-campaign

Quick Facts

TypeMalware Family

Aliases1

Also Known As

win.blister

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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