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Cyber Threat
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Ransomware victim Manufacturing

Semper Laser

Listed by Direwolf on · organisation based in Sweden

semperlaser.com

Disclosed
Sep 7, 2026
Leak-site listing date
Threat group
Direwolf
148 victims listed
Country
Sweden
#20 most targeted
Sector
Manufacturing

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Direwolf. Figures and technique mappings are quoted from the source data, not inferred.

Direwolf listed Semper Laser on its dark web leak site on 7 September 2026; Semper Laser is based in Sweden and operates in the manufacturing sector.

About the Direwolf group

Dire Wolf is a sophisticated human-operated ransomware group first documented in May 2025, written in Golang using Curve25519/ChaCha20 encryption, targeting manufacturing and technology sectors across 13+ countries with ransoms up to $500,000, operated by a tight core team rather than a broad affiliate program. Direwolf has listed 136 victims since April 2025.

Vulnerabilities Direwolf is recorded exploiting

5 of these 5 are in the CISA Known Exploited Vulnerabilities catalog, 5 of them recorded by CISA as used in ransomware campaigns. CVEs attributed to Direwolf across its reported activity. There is no indication that any of these was involved in the Semper Laser incident — the source data does not record an entry point.

Incident analysis

Semper Laser was listed by Direwolf ransomware, a group with 148 victims recorded in this database. The listing appeared on the group's leak site on September 7, 2026.

Semper Laser is based in Sweden and operates in the Manufacturing sector. Sweden ranks #20 worldwide for ransomware disclosures, with 160 victims in this database.

Sector context. Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Direwolf typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Semper Laser attacked by ransomware?

Yes. Semper Laser was listed as a victim of the Direwolf ransomware group on September 7, 2026. The organisation is based in Sweden and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Semper Laser?

Semper Laser was attacked by Direwolf ransomware. Direwolf is one of the most active ransomware groups, having claimed 148 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Semper Laser ransomware attack occur?

The ransomware attack on Semper Laser was disclosed on September 7, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Semper Laser ransomware attack?

The specific data stolen from Semper Laser has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Manufacturing organisation, Semper Laser likely held sensitive business data, client information, and operational records.

How can organisations protect against Direwolf attacks?

To defend against Direwolf and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.