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Cyber Threat
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Ransomware victim Consumer Services

STANDBYTE

Listed by Arcusmedia on · organisation based in Brazil

standbyte.com.br

Disclosed
May 30, 2025
Leak-site listing date
Threat group
Arcusmedia
121 victims listed
Country
Brazil
#7 most targeted
Sector
Consumer Services

ThreatAI analysis

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

About the Arcusmedia group

Arcus Media is a ransomware-as-a-service group that emerged in May 2024, employing double extortion with ChaCha20 + RSA-2048 encryption and recruiting affiliates via a referral-based vetting process, claiming 50+ victims across manufacturing, healthcare, retail, and business services globally. Arcusmedia has listed 115 victims since May 2024.

Incident analysis

STANDBYTE was listed by Arcusmedia ransomware, a group with 121 victims recorded in this database. The listing appeared on the group's leak site on May 30, 2025.

STANDBYTE is based in Brazil and operates in the Consumer Services sector. Brazil ranks #7 worldwide for ransomware disclosures, with 532 victims in this 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 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 STANDBYTE attacked by ransomware?

Yes. STANDBYTE was listed as a victim of the Arcusmedia ransomware group on May 30, 2025. The organisation is based in Brazil and operates in the Consumer Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked STANDBYTE?

STANDBYTE was attacked by Arcusmedia ransomware. Arcusmedia is one of the most active ransomware groups, having claimed 121 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the STANDBYTE ransomware attack occur?

The ransomware attack on STANDBYTE was disclosed on May 30, 2025. 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 STANDBYTE ransomware attack?

The specific data stolen from STANDBYTE 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 Consumer Services organisation, STANDBYTE 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.