Payload Ransomware Victims: Payload Ransomware Uses ChaCha20 and Curve25519 ECDH to Encrypt Windows Files

Payload Ransomware Victims: Payload Ransomware Uses ChaCha20 and Curve25519 ECDH to Encrypt Windows Files

Emerging Payload Ransomware Targets Global Organizations with Advanced Tactics

A sophisticated new ransomware strain, Payload, has been actively compromising organizations worldwide since its debut in February 2026. The group behind the malware has rapidly expanded its operations, with victims spanning Egypt, Mexico, Poland, and beyond, targeting industries where operational downtime translates to immediate financial losses particularly logistics, transportation, construction, and real estate in the MENA region.

By March 24, 2026, the threat actors had listed 50 victims on their leak site, including firms in manufacturing, technology, and real estate. The ransomware appends the “.payload” extension to encrypted files and leaves a ransom note (RECOVER_payload.txt), giving victims 240 hours to initiate negotiations.

Technical Sophistication and Evasion Tactics

Payload stands out for its highly evasive encryption engine, designed to maximize damage while minimizing detection. Key features include:

  • Per-file encryption: Uses ChaCha20 and Curve25519 ECDH to generate unique keys for each file, making recovery without the attacker’s private key nearly impossible. Files are encrypted in 1MB chunks, with a 56-byte footer containing encrypted key material.
  • Anti-forensic measures: Deletes Windows shadow copies, patches event-tracing functions in memory, and clears Windows Event Logs (Application, System, Security) to erase forensic evidence.
  • Process termination: Kills over 30 processes and stops 40+ services, including SQL databases, Veeam, and Acronis backups, to disable recovery options before encryption.
  • Bypass techniques: Uses direct Windows NT API calls instead of standard user-mode functions, evading security tools that monitor higher-level activity. A mutex named “MakeAmericaGreatAgain” prevents multiple instances from running on the same machine.
  • Speed optimization: Automatically selects between AVX2, SSE2, or scalar encryption paths based on the victim’s CPU.

Indicators of Compromise (IoCs)

Security teams should monitor for:

  • File extensions: .payload
  • Ransom note: RECOVER_payload.txt
  • Log file: \??\C:\payload.log
  • Mutex: MakeAmericaGreatAgain
  • Hashes:
    • MD5: E0FD8FF6D39E4C11BDAF860C35FD8DC0
    • SHA1: DDE1B933AAD33C5D96C2E45AD46434A200DC46A6
    • SHA256: 1CA67AF90400EE6CBBD42175293274A0F5DC05315096CB2E214E4BFE12FFB71F
  • Tor sites:
    • Leak site: payloadrz5yw227brtbvdqpnlhq3rdcdekdnn3rgucbcdeawq2v6vuyd[.]onion
    • Negotiation portal: payloadynyvabjacbun4uwhmxc7yvdzorycslzmnleguxjn7glahsvqd[.]onion

Impact and Outlook

Payload ransomware represents a growing threat with international ambitions, leveraging technical maturity to evade detection and cripple recovery efforts. Its focus on high-pressure industries and aggressive anti-forensic tactics underscores the need for heightened monitoring, particularly for sudden termination of backup services and unusual encryption activity. As the group continues to refine its operations, tracking its leak site, victim patterns, and code updates will be critical for defenders.

Source: https://cybersecuritynews.com/payload-ransomware-uses-chacha20/

PAYLOAD Technologies Inc. cybersecurity rating report: https://www.rankiteo.com/company/payload

"id": "PAY1779783937",
"linkid": "payload",
"type": "Ransomware",
"date": "2/2026",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"
{'affected_entities': [{'industry': ['Logistics',
                                     'Transportation',
                                     'Construction',
                                     'Real Estate',
                                     'Manufacturing',
                                     'Technology'],
                        'location': ['Egypt',
                                     'Mexico',
                                     'Poland',
                                     'MENA region'],
                        'type': 'Organization'}],
 'data_breach': {'data_encryption': 'ChaCha20 and Curve25519 ECDH (per-file '
                                    'encryption)'},
 'date_detected': '2026-02-01',
 'date_publicly_disclosed': '2026-03-24',
 'description': 'A sophisticated new ransomware strain, Payload, has been '
                'actively compromising organizations worldwide since its debut '
                'in February 2026. The group behind the malware has rapidly '
                'expanded its operations, targeting industries where '
                'operational downtime translates to immediate financial '
                'losses, particularly logistics, transportation, construction, '
                'and real estate in the MENA region. By March 24, 2026, the '
                'threat actors had listed 50 victims on their leak site, '
                'including firms in manufacturing, technology, and real '
                "estate. The ransomware appends the '.payload' extension to "
                'encrypted files and leaves a ransom note '
                '(RECOVER_payload.txt), giving victims 240 hours to initiate '
                'negotiations.',
 'impact': {'operational_impact': 'High (operational downtime in targeted '
                                  'industries)',
            'systems_affected': 'Windows systems'},
 'lessons_learned': 'Payload ransomware represents a growing threat with '
                    'international ambitions, leveraging technical maturity to '
                    'evade detection and cripple recovery efforts. Heightened '
                    'monitoring is needed for sudden termination of backup '
                    'services and unusual encryption activity.',
 'motivation': 'Financial gain',
 'ransomware': {'data_encryption': 'Per-file encryption with ChaCha20 and '
                                   'Curve25519 ECDH, 1MB chunks, 56-byte '
                                   'footer',
                'ransomware_strain': 'Payload'},
 'recommendations': 'Track leak site, victim patterns, and code updates. '
                    'Monitor for indicators of compromise such as .payload '
                    'file extensions, RECOVER_payload.txt ransom note, and '
                    'specific hashes/mutex.',
 'references': [{'source': 'Payload Ransomware Leak Site',
                 'url': 'payloadrz5yw227brtbvdqpnlhq3rdcdekdnn3rgucbcdeawq2v6vuyd[.]onion'},
                {'source': 'Payload Ransomware Negotiation Portal',
                 'url': 'payloadynyvabjacbun4uwhmxc7yvdzorycslzmnleguxjn7glahsvqd[.]onion'}],
 'response': {'enhanced_monitoring': 'Recommended for sudden termination of '
                                     'backup services and unusual encryption '
                                     'activity'},
 'threat_actor': 'Payload Ransomware Group',
 'title': 'Emerging Payload Ransomware Targets Global Organizations with '
          'Advanced Tactics',
 'type': 'Ransomware'}
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