Analysis of Fairlife Production Outage: Detecting Encryption-Based Attacks in Manufacturing

The recent confirmation that Coca-Cola has suspended production at its US Fairlife facilities due to an "encryption-based cyber incident" serves as a stark reminder of the fragility of modern manufacturing supply chains. While the full scope of the breach remains under investigation, the impact is immediate: production lines halted, supply chain disruption, and potential revenue loss.

For defenders, this is not just a headline; it is a scenario that plays out daily across the sector. Encryption-based attacks—typically ransomware—target the availability of data critical to Operations Technology (OT) and Industrial Control Systems (ICS). When production logic or配方 data is encrypted, the physical process stops. This post provides the technical detection and remediation steps necessary to identify and contain such threats before they halt operations.

Technical Analysis

Affected Products & Platforms

While the specific malware strain has not been publicly disclosed, encryption-based incidents in manufacturing environments typically target:

Windows-based SCADA/HMI Servers: Often running legacy Windows versions where lateral movement is easier.
File Servers & NAS: Storing intellectual property (IP), batch records, and配方 data.
OT Workstations: Engineering stations connected to both the corporate IT network and the plant floor.

Attack Vector and Mechanics

The incident is described as "encryption-based," implying an adversary has achieved sufficient access to execute cryptographic algorithms against critical files. The attack chain generally follows this pattern:

Initial Access: Phishing, exploitation of public-facing services, or compromise of a remote management tool (common in converged IT/OT environments).
Lateral Movement: The adversary moves from the IT network to the OT network, often leveraging remote desktop protocols (RDP) or unpatched vulnerabilities in industrial software.
Privilege Escalation: Grabbing domain admin credentials to access file shares and backup servers.
Defense Evasion: Active deletion of Volume Shadow Copies to prevent native recovery.
Impact: Execution of the encryption payload against file shares and local drives, bringing production to a standstill.

Exploitation Status

This is a confirmed active exploitation scenario impacting critical infrastructure. The lack of a specific CVE in the reporting suggests the initial compromise may have been credential-based or involved a zero-day/n-day exploit specific to the environment, rather than a widespread vulnerability like PrintNightmare. However, the mechanism of impact—systematic encryption—is observable regardless of the initial vector.

Detection & Response

Rapid identification of encryption behavior is the only way to prevent total system lockout. The following rules focus on the precursor behaviors (defense evasion) and the act of bulk encryption via system tools.

YAML

---
title: Potential Ransomware - Shadow Copy Deletion
id: 8a1c2e45-6d7b-4e8c-9a1f-2b3c4d5e6f7a
status: experimental
description: Detects attempts to delete volume shadow copies using vssadmin or wmic, a common precursor to encryption to prevent recovery.
references:
  - https://attack.mitre.org/techniques/T1490/
author: Security Arsenal
date: 2026/04/10
tags:
  - attack.impact
  - attack.t1490
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith:
      - '\vssadmin.exe'
      - '\wmic.exe'
    CommandLine|contains:
      - 'delete shadows'
      - 'shadowcopy delete'
condition: selection
falsepositives:
  - System maintenance by administrators
level: high
---
title: Potential Ransomware - Wbadmin System State Deletion
id: 9b2d3f56-7e8c-5f9d-0b2a-3c4d5e6f7a8b
status: experimental
description: Detects the use of wbadmin to delete system state backups or catalog, preventing recovery during an encryption attack.
references:
  - https://attack.mitre.org/techniques/T1490/
author: Security Arsenal
date: 2026/04/10
tags:
  - attack.impact
  - attack.t1490
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith: '\wbadmin.exe'
    CommandLine|contains:
      - 'delete catalog'
      - 'delete systemstatebackup'
condition: selection
falsepositives:
  - Legitimate backup management
level: high
---
title: Suspicious Mass Encryption via PowerShell
id: 1a2b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects PowerShell scripts that may be used for file encryption by loading specific cryptographic namespaces commonly used in ransomware scripts.
references:
  - https://attack.mitre.org/techniques/T1059/001/
author: Security Arsenal
date: 2026/04/10
tags:
  - attack.execution
  - attack.t1059.001
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith:
      - '\powershell.exe'
      - '\pwsh.exe'
    CommandLine|contains:
      - 'System.Security.Cryptography.AesManaged'
      - 'System.IO.File.WriteAllBytes'
      - '.Encrypt('
  condition: selection
falsepositives:
  - Rare legitimate administrative encryption scripts
level: high

KQL (Microsoft Sentinel / Defender)

This query hunts for SMB traffic indicative of network share encryption. It looks for non-standard processes initiating high volumes of SMB connections or writes, which often precedes mass file locking.

KQL — Microsoft Sentinel / Defender

DeviceNetworkEvents
| where RemotePort == 445
| where InitiatingProcessFileName !in~ ("explorer.exe", "svchost.exe", "lsass.exe", "services.exe", "system", "splwow64.exe")
| where ActionType == "ConnectionSuccess" or ActionType == "FileCreated"
| summarize count() by InitiatingProcessFileName, InitiatingProcessCommandLine, DeviceName, bin(TimeGenerated, 5m)
| where count_ > 50
| order by count_ desc

Velociraptor VQL

In a DFIR scenario, identifying the process responsible for mass file handles is critical. This artifact hunts for processes holding an unusually high number of file handles, a common signature for a process traversing and encrypting a directory tree.

VQL — Velociraptor

-- Hunt for processes with high handle counts, indicative of bulk encryption
SELECT Pid, Name, Username, Handles, CommandLine, StartTime
FROM pslist()
WHERE Handles > 500
ORDER BY Handles DESC
LIMIT 20

Remediation Script (PowerShell)

Use this script on critical servers to verify the integrity of Volume Shadow Copies and ensure backup mechanisms have not been disabled by a precursor attack.

PowerShell

# Check Volume Shadow Copy Storage Association and Status
Write-Host "[+] Checking Volume Shadow Copy Status..."
try {
    $ShadowCopies = Get-WmiObject -Class Win32_ShadowCopy -ErrorAction Stop
    if ($ShadowCopies) {
        $ShadowCopies | Format-List DeviceObject, InstallDate, VolumeName, OriginatingMachine
    } else {
        Write-Host "[WARNING] No Volume Shadow Copies found. This may indicate deletion." -ForegroundColor Yellow
    }
}
catch {
    Write-Host "[ERROR] Failed to query Shadow Copies: $_" -ForegroundColor Red
}

# Check if VSS Service is running
Write-Host "[+] Verifying VSS Service State..."
$VssSvc = Get-Service -Name VSS -ErrorAction SilentlyContinue
if ($VssSvc) {
    Write-Host "VSS Service Status: $($VssSvc.Status)"
} else {
    Write-Host "[WARNING] VSS Service not found." -ForegroundColor Yellow
}

Remediation

Immediate containment is required when encryption is detected or suspected in a manufacturing environment:

Network Segmentation: Immediately isolate affected OT segments from the corporate IT network. Disable VLANs or firewall rules allowing RDP, SMB, and RPC traffic between IT and OT zones.
Terminate Malicious Processes: If a specific encryption process is identified via the VQL or Sigma rules above, terminate it immediately on the endpoint.
Preserve Artifacts: Do not reboot affected servers immediately if possible. Capture memory dumps to identify the encryption key or initial access vector. If reboots are necessary for containment, image the disk first.
Credential Reset: Assume domain administrator credentials are compromised. Force a password reset for all privileged accounts in the OT directory and revoke any existing Kerberos tickets.
Restore from Immutable Backups: Recover encrypted systems from offline, immutable backups. Verify the integrity of the backup before restoring to ensure it is not also infected.

Related Resources

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