Fairlife Ransomware Breach: Detecting and Mitigating Encryption-Based Data Theft

Introduction

The Coca-Cola Company has confirmed that its subsidiary, Fairlife, fell victim to a "encryption-based cyber incident" earlier this month, resulting in confirmed data theft. This breach highlights the persistent threat of double-extortion ransomware campaigns targeting critical supply chain partners, regardless of the parent organization's security maturity. For defenders, the terminology "encryption-based" is a critical indicator: it suggests adversaries may have utilized native operating system tools (like BitLocker) or custom ransomware payloads to lock systems while simultaneously exfiltrating sensitive data for leverage. This post provides defensive telemetry and hardening steps to detect and mitigate encryption-based extortion techniques.

Technical Analysis

While the specific CVE exploited in the Fairlife incident has not been publicly disclosed, the attack profile aligns with modern human-operated ransomware campaigns characterized by:

Initial Access: Likely achieved via phishing, vulnerable public-facing services, or valid credential theft.
Lateral Movement: Use of remote management tools (e.g., RDP, PowerShell) to traverse the network.
Data Theft: Large-scale exfiltration of sensitive documents prior to encryption to force payment.
Encryption Payload: The description "encryption-based" often implies the abuse of legitimate Windows utilities like manage-bde.exe (BitLocker) to encrypt drives without dropping traditional executable malware, effectively bypassing some antivirus signatures.

Affected Components:

Windows File Systems (NTFS)
Windows Management Instrumentation (WMI)
Native Disk Encryption Utilities

Exploitation Status: Confirmed active exploitation resulting in data theft and service disruption.

Detection & Response

The following detection rules focus on identifying the abuse of native encryption tools and precursor activities common in these attacks.

SIGMA Rules

YAML

---
title: Potential BitLocker Ransomware Activity
id: 8a4f1b23-5c6d-4e7f-9a0b-1c2d3e4f5a6b
status: experimental
description: Detects the use of manage-bde.exe to encrypt drives, a technique used in human-operated ransomware and "BitLocker" locker schemes to avoid dropping custom malware.
references:
  - https://attack.mitre.org/techniques/T1486/
author: Security Arsenal
date: 2026/04/22
tags:
  - attack.impact
  - attack.t1486
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith: '\manage-bde.exe'
    CommandLine|contains:
      - '-on'
      - '-lock'
      - '-force'
  condition: selection
falsepositives:
  - Legitimate administrator enabling BitLocker on new drives
level: high
---
title: Volume Shadow Copy Deletion via Vssadmin
id: 9b5g2c34-6d7e-5f8g-0b1c-2d3e4f5a6b7c
status: experimental
description: Detects commands attempting to delete Volume Shadow Copies, a common precursor to encryption to prevent recovery.
references:
  - https://attack.mitre.org/techniques/T1490/
author: Security Arsenal
date: 2026/04/22
tags:
  - attack.impact
  - attack.t1490
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith: '\vssadmin.exe'
    CommandLine|contains: 'delete shadows'
  condition: selection
falsepositives:
  - System administration scripts managing storage
level: high

KQL (Microsoft Sentinel / Defender)

KQL — Microsoft Sentinel / Defender

// Hunt for native encryption abuse and data exfil precursors
DeviceProcessEvents
| where Timestamp > ago(7d)
| where (FileName in~ ("manage-bde.exe", "cipher.exe", "vssadmin.exe") 
   or ProcessCommandLine has_any ("-on", "delete shadows", "/w"))
| extend HostName = DeviceName
| project Timestamp, HostName, AccountName, FileName, ProcessCommandLine, InitiatingProcessFileName
| order by Timestamp desc

Velociraptor VQL

VQL — Velociraptor

-- Hunt for suspicious process execution related to encryption and data wiping
SELECT Pid, Name, CommandLine, Exe, Username, CreateTime
FROM pslist()
WHERE Name =~ 'manage-bde' 
   OR Name =~ 'vssadmin'
   OR CommandLine =~ 'delete shadows'
   OR CommandLine =~ '-on.*C:'

Remediation Script (PowerShell)

PowerShell

<#
.SYNOPSIS
    Audit BitLocker status and ensure recovery keys are backed up to AD to mitigate locker-style ransomware.
.DESCRIPTION
    This script checks all fixed drives for BitLocker status. If a drive is encrypted, it verifies 
    that the recovery password is backed up to Active Directory. If not, it attempts to back it up.
    This helps prevent permanent data loss in encryption-based attacks.
#>

Write-Host "Starting BitLocker Compliance Audit..." -ForegroundColor Cyan

$BitLockerVolumes = Get-BitLockerVolume

foreach ($Volume in $BitLockerVolumes) {
    if ($Volume.VolumeType -eq 'OperatingSystem' -or $Volume.VolumeType -eq 'Data') {
        $MountPoint = $Volume.MountPoint
        $ProtectionStatus = $Volume.VolumeStatus
        
        Write-Host "Checking Volume: $MountPoint" -NoNewline
        
        if ($ProtectionStatus -eq 'FullyEncrypted') {
            $KeyProtector = $Volume.KeyProtector | Where-Object { $_.KeyProtectorType -eq 'RecoveryPassword' }
            
            if ($KeyProtector) {
                # Check AD Backup Status (requires RSAT or Domain Admin context)
                try {
                    $ADBackup = Backup-BitLockerKeyProtector -MountPoint $MountPoint -KeyProtectorId $KeyProtector.KeyProtectorId -ErrorAction SilentlyContinue
                    if ($?) {
                        Write-Host " [ENCRYPTED] [KEY BACKED UP TO AD]" -ForegroundColor Green
                    } else {
                        Write-Host " [ENCRYPTED] [WARNING: AD BACKUP FAILED/ALREADY EXISTS]" -ForegroundColor Yellow
                    }
                } catch {
                    Write-Host " [ENCRYPTED] [ERROR: VERIFY AD BACKUP MANUALLY]" -ForegroundColor Red
                }
            } else {
                Write-Host " [ENCRYPTED] [CRITICAL: NO RECOVERY KEY FOUND]" -ForegroundColor Red
            }
        } else {
            Write-Host " [NOT ENCRYPTED]" -ForegroundColor Yellow
        }
    }
}

Write-Host "Audit Complete. Review output for Critical warnings." -ForegroundColor Cyan

Remediation

To defend against encryption-based attacks and data theft:

Restrict Native Tools: Implement Application Control policies (e.g., AppLocker or Windows Defender Application Control) to block manage-bde.exe and vssadmin.exe for standard users and non-administrative contexts.
Enforce MFA: Require phishing-resistant MFA for all remote access and administrative accounts to prevent credential theft.
Immutable Backups: Ensure critical data is backed up to an immutable or WORM (Write Once, Read Many) storage solution. Test restoration procedures regularly.
Network Segmentation: Segment sensitive systems (like HR and Finance databases) from general corporate networks to limit lateral movement and data theft.
Monitor for Exfiltration: Deploy egress monitoring to detect large, unusual data transfers, which often precede the encryption phase.

Related Resources

Security Arsenal Incident Response Services AlertMonitor Platform Book a SOC Assessment incident-response Intel Hub