BRAINCIPHER Ransomware: US Manufacturing & Services Under Siege — Critical Firewall Exploitation Detected

---
title: Potential Check Point Security Gateway Exploitation (CVE-2026-50751)
id: 9a8c7d6e-5f4b-3a2c-1d0e-9f8a7b6c5d4e
status: experimental
description: Detects potential exploitation of Check Point Security Gateway IKEv1 improper authentication vulnerability.
author: Security Arsenal Research
date: 2026/07/10
logsource:
  product: firewall
  service: check_point
detection:
  selection:
    product: 'VPN'
    action: 'key_install'
    ike_version: 'IKEv1'
  filter:
    src_ip:
      - '10.0.0.0/8'
      - '192.168.0.0/16'
      - '172.16.0.0/12'
  condition: selection and not filter
falsepositives:
  - Legitimate remote access VPN connections from known corporate ranges
level: high
tags:
  - cve.2026.50751
  - attack.initial_access
  - braincipher
---
title: Suspicious Cisco FMC Management Interface Access (CVE-2026-20131)
id: b1c2d3e4-5a6b-7c8d-9e0f-1a2b3c4d5e6f
status: experimental
description: Detects suspicious administrative access patterns to Cisco Secure Firewall Management Center indicative of deserialization exploits.
author: Security Arsenal Research
date: 2026/07/10
logsource:
  product: cisco
  service: fmc
detection:
  selection:
    event_id: 733001  # Authentication Successful
    dest_port: 443
  filter_legit:
    src_user|contains:
      - 'admin'
      - 'svc_'
  condition: selection and not filter_legit
falsepositives:
  - New administrative setup
level: critical
tags:
  - cve.2026.20131
  - attack.initial_access
  - braincipher
---
title: BRAINCIPHER Lateral Movement via PsExec
id: c3d4e5f6-1a2b-3c4d-5e6f-7a8b9c0d1e2f
status: experimental
description: Detects the use of PsExec for lateral movement, a common technique observed in BRAIN CIPHER intrusions.
author: Security Arsenal Research
date: 2026/07/10
logsource:
  product: windows
  service: security
detection:
  selection:
    EventID: 5145
    ShareName|contains: 'IPC$'
    RelativeTargetName|endswith: 'PSEXESVC'
  condition: selection
falsepositives:
  - legitimate IT administration using PsExec
level: high
tags:
  - attack.lateral_movement
  - attack.t1021.002
  - braincipher

// Hunt for lateral movement and data staging associated with BRAIN CIPHER
let TimeFrame = 1d;
DeviceProcessEvents  
| where Timestamp >= ago(TimeFrame)
| where FileName in~ ("powershell.exe", "cmd.exe", "pwsh.exe")
| where ProcessCommandLine has_any("Invoke-Expression", "IEX", "DownloadString", "EncryptedData", "rar.exe", "7z.exe")
| summarize Count = count(), ArgList = make_set(ProcessCommandLine) by DeviceName, AccountName, Timestamp
| where Count > 5
| project Timestamp, DeviceName, AccountName, ArgList
| extend AlertMessage = "Potential BRAIN CIPHER lateral movement or data staging activity detected"

<#
.SYNOPSIS
    BRAIN CIPHER Rapid Response Hardening Script
.DESCRIPTION
    Checks for indicators of compromise associated with BRAIN CIPHER campaigns, including suspicious scheduled tasks and recent RDP/VPN log anomalies.
#>

Write-Host "[+] Initiating BRAIN CIPHER Rapid Response Check..." -ForegroundColor Cyan

# 1. Check for recently created suspicious scheduled tasks (common for persistence)
$DateCutoff = (Get-Date).AddDays(-7)
Write-Host "[*] Checking for Scheduled Tasks created in the last 7 days..." -ForegroundColor Yellow
Get-ScheduledTask | Where-Object {$_.Date -gt $DateCutoff} | 
    Select-Object TaskName, TaskPath, State, Author | Format-Table -AutoSize

# 2. Check for recent modifications to Volume Shadow Copies (pre-encryption staging)
Write-Host "[*] Checking for Volume Shadow Copy modifications..." -ForegroundColor Yellow
$vss = vssadmin list shadows | Select-String "Shadow Copy Volume"
if ($vss) { Write-Host $vss } else { Write-Host "No Shadow Copies found (potentially deleted)." -ForegroundColor Red }

# 3. Enumerate active RDP sessions (Non-console)
Write-Host "[*] Enumerating active RDP sessions..." -ForegroundColor Yellow
query user | Where-Object { $_ -match 'Active' -and $_ -notmatch 'console' }

Write-Host "[+] Scan Complete." -ForegroundColor Green
Write-Host "[!] If suspicious tasks are found or VSS is missing, initiate Incident Response protocol immediately." -ForegroundColor Red