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Ransomware Victim Government & Defense

Perpustam

Ransomware attack by Arcusmedia Β· Disclosed July 14, 2026 Β· πŸ‡²πŸ‡Ύ Malaysia

Perpustam.gov.my

Date Disclosed
Jul 14, 2026
2026
Threat Group
Arcusmedia
107 total victims
Country
πŸ‡²πŸ‡Ύ Malaysia
Industry
Government & Defense

Incident Analysis

Perpustam was targeted by Arcusmedia ransomware, one of the most active ransomware groups in our database with 107 confirmed victims globally. The attack was disclosed on July 14, 2026, when Perpustam appeared on the group's dark web leak site.

Perpustam is based in Malaysia , operating in the Government & Defense sector. Malaysia ranks #24 globally for ransomware attacks, with 117 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Arcusmedia typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats β€” paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Aug 4, 2026 04:00 UTC.

Frequently Asked Questions

Was Perpustam attacked by ransomware?

Yes. Perpustam was listed as a victim of the Arcusmedia ransomware group on July 14, 2026. The organisation is based in Malaysia and operates in the Government & Defense sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Perpustam?

Perpustam was attacked by Arcusmedia ransomware. Arcusmedia is one of the most active ransomware groups, having claimed 107 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Perpustam ransomware attack occur?

The ransomware attack on Perpustam was disclosed on July 14, 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 Perpustam ransomware attack?

The specific data stolen from Perpustam 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 Government & Defense organisation, Perpustam likely held sensitive business data, client information, and operational records.

How can organisations protect against Arcusmedia attacks?

To defend against Arcusmedia 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.