FortiBleed Credential Theft Connected to INC and Lynx Ransomware

FortiBleed, the Fortinet credential theft campaign, is now connected to INC Ransom and Lynx, with a Nextcloud zero-day vulnerability also under investigation. This represents a HIGH-severity threat (elevated risk profile) requiring immediate evaluation by SOC and vulnerability management teams.

CYBERDUDEBIVASH® SENTINEL APEX has classified this as a priority intelligence item requiring immediate defensive action.

Ransomware encryption of production systems carries average recovery costs exceeding $1.85M (Sophos State of Ransomware 2024) excluding reputational damage and regulatory penalty exposure. GDPR Article 33 requires breach notification within 72 hours; NIS2 Directive extends mandatory reporting to a broader set of critical sectors.

Risk quantification requires correlation against your specific asset inventory, data classification, and regulatory obligations. CVSS scores reflect technical severity, not business impact to your environment.

FortiBleed, the Fortinet credential theft campaign, is now connected to INC Ransom and Lynx, with a Nextcloud zero-day vulnerability also under investigation.

title: Ransomware Pre-Encryption Activity — Shadow Deletion and PowerShell Staging
id: cdb-sentinel-apex-20260703-001
status: experimental
description: >
  Detects ransomware pre-encryption activity — shadow deletion and powershell staging.
  CYBERDUDEBIVASH® SENTINEL APEX Detection Engineering.
references:
    - https://hackread.com/fortibleed-credential-theft-in-lynx-ransomware/
    - https://blog.cyberdudebivash.in
    - https://intel.cyberdudebivash.com
author: CYBERDUDEBIVASH® SENTINEL APEX Detection Engineering
date: 2026/07/03
tags:
    - attack.impact
    - attack.t1486
    - attack.t1490
    - attack.t1059.001
logsource:
    product: windows
    category: process_creation
detection:
    shadow_deletion:
        Image|endswith:
            - '\vssadmin.exe'
            - '\wmic.exe'
            - '\wbadmin.exe'
            - '\bcdedit.exe'
        CommandLine|contains:
            - 'delete shadows'
            - 'delete catalog'
            - 'recoveryenabled No'
            - 'shadowcopy delete'
    ransom_ps_staging:
        Image|endswith: '\powershell.exe'
        CommandLine|contains:
            - 'EncodedCommand'
            - 'FromBase64String'
            - 'IEX'
            - 'DownloadString'
    condition: shadow_deletion or ransom_ps_staging
falsepositives:
    - Legitimate administrative activity
    - Security testing or red team exercises
level: high