Ransomware group profile · #24 by claimed victims

Pysa ransomware

Mespinosa is a ransomware which encrypts file using an asymmetric encryption and adds .pysa as file extension. According to dissectingmalware the extension "pysa" is probably derived from the Zanzibari Coin with the same name.

Active First seen Jul 2020

308Victims claimed on leak sites

0Victims in the last 30 days

0Victims in the last 90 days

4Countries hit

1Leak-site URLs tracked, 0 online

6 Dec 2021Latest claim recorded

Victimology

Who Pysa claims to have breached, from 308 leak-site posts recorded by VULONE.

Claims per month last 12 months

Top sectors

Education50

Professional Services43

Healthcare32

Manufacturing32

Technology22

Government & Defense17

Retail & E-Commerce17

Transportation17

Top countries

Canada2

United States1

France1

United Kingdom1

Latest claimed victims 12 most recent

Victim	Sector	Country	Claimed
CHR Solutions	Professional Services	-	6 Dec 2021
Î¤ÎÎ§ÎÎÎÎÎÎÎÎ Î ÎÎÎÎ ÎÎ£Î¤ÎÎÎÎ ÎÎ¥Î Î¡ÎÎ¥	Not Found	-	8 Nov 2021
The Skinners Kent Academy	Education	-	8 Nov 2021
Kent County Council	Government & Defense	-	8 Nov 2021
Rusty Hardin & Associates	Professional Services	-	8 Nov 2021
R.E. Pedrotti Co. r.e. pedrotti co.	Manufacturing	-	8 Nov 2021
UEMOA	Government & Defense	-	8 Nov 2021
Skatetown	Retail & E-Commerce	-	8 Nov 2021
CHRYSO	Manufacturing	-	8 Nov 2021
itimCloud	Technology	-	8 Nov 2021
Bayonet	Technology	-	8 Nov 2021
Fly Arik Air	Transportation	-	8 Nov 2021

All 308 Pysa victims, searchable

Full victim list with claim posts, domains, timing and exports, plus the negotiation chats and leak-site screenshots VULONE archives for this crew.

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Tactics, techniques and procedures

ATT&CK technique mapping for Pysa is in progress. Victimology, infrastructure status and leak-site tracking are live above.

Indicators, detections and the full playbook

Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.

See full IOCs

Frequently asked

Is Pysa ransomware still active?

Pysa is tracked as active. The most recent leak-site claim VULONE recorded is dated 6 December 2021.

How many victims has Pysa claimed?

VULONE has recorded 308 leak-site victim claims attributed to Pysa since July 2020, across 4 countries and 14 sectors.

Which industries does Pysa target?

The sectors most often named on the Pysa leak site are Education, Professional Services, Healthcare.

Which countries are most affected by Pysa?

Most Pysa victims recorded by VULONE are located in Canada, United States, France.

Where does VULONE get Pysa victim data?

Claims are collected continuously from the group's own leak sites and cross-checked with ransomware.live and RansomLook. A claim is the group's assertion, not a confirmed breach.

Other ransomware groups

Victim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 31 October 2026. Questions or corrections: research@vulone.com.