Brinks Home Data Breach: Defending Against Extortion-Based Exfiltration

---
title: Potential Database Dumping Activity
id: 8c2b2c34-6f12-4a89-b9c3-1d2f3e4a5b6c
status: experimental
description: Detects command-line patterns consistent with database dumping tools (e.g., sqlcmd, mysqldump) which are often used prior to data extortion.
references:
  - https://attack.mitre.org/techniques/T1046/
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.collection
  - attack.t1005
logsource:
  category: process_creation
  product: windows
detection:
  selection_tools:
    Image|endswith:
      - '\sqlcmd.exe'
      - '\bcp.exe'
      - '\mysqldump.exe'
      - '\pg_dump.exe'
  selection_params:
    CommandLine|contains:
      - ' -Q '
      - ' -q '
      - ' --single-transaction'
      - ' --where='
  condition: 1 of selection_* and all of selection_*
falsepositives:
  - Legitimate administrative database backups
level: high
---
title: Large Volume Data Compression on Server
id: a1b2c3d4-e5f6-7890-1234-56789abcdef0
status: experimental
description: Detects the use of archiving tools like 7-Zip or WinRAR on server assets, which may indicate an attacker staging data for exfiltration.
references:
  - https://attack.mitre.org/techniques/T1560/
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.collection
  - attack.t1560.001
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith:
      - '\7z.exe'
      - '\winrar.exe'
      - '\zip.exe'
      - '\tar.exe'
    CommandLine|contains:
      - '-mx9'
      - '-m0'
      - 'a -tzip'
  filter_server:
    Hostname|contains:
      - 'SRV'
      - 'DB'
      - 'FILE'
  condition: selection and filter_server
falsepositives:
  - System administrator backups
level: medium
---
title: Suspicious Rclone Cloud Exfiltration
id: b2c3d4e5-f6a7-8901-2345-6789abcdef1
status: experimental
description: Detects the use of rclone, a tool frequently used by threat actors to exfiltrate data to cloud storage providers.
references:
  - https://attack.mitre.org/techniques/T1048/
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.exfiltration
  - attack.t1048
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith:
      - '\rclone.exe'
      - '\rclone'
    CommandLine|contains:
      - 'sync'
      - 'copy'
      - 'config create'
  condition: selection
falsepositives:
  - Authorized use by backup engineers
level: high

let CompressionTools = dynamic(["7z.exe", "winrar.exe", "winzip.exe", "zip.exe"]);
let TimeFrame = 1h;
// Join process creation with network events to find compression followed by upload
DeviceProcessEvents
| where Timestamp > ago(TimeFrame)
| where FileName in (CompressionTools) or ProcessVersionInfoOriginalFileName in (CompressionTools)
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessFileName
| join kind=inner (
    DeviceNetworkEvents
    | where Timestamp > ago(TimeFrame)
    | where ActionType == "ConnectionSuccess" 
    | where RemotePort in (80, 443, 21) // Common web/ftp ports for exfil
    | summarize SentBytes = sum(SentBytes) by DeviceName, Timestamp, RemoteUrl
    | where SentBytes > 25000000 // Greater than 25MB
) on DeviceName
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, RemoteUrl, SentBytes
| extend AlertDetails = strcat("Potential data exfil: ", AccountName, " compressed files then sent ", SentBytes, " bytes to ", RemoteUrl)

-- Hunt for recently created archive files potentially used for staging data theft
SELECT FullPath, Size, Mtime, Mode.Bits, User
FROM glob(globs='/**/*.{zip,rar,7z,tar,gz}')
WHERE Mtime > now() - 24h
  AND Size > 1000000 -- Only archives larger than 1MB
ORDER BY Mtime DESC

# Incident Response Script: Audit Active Sessions and Recent File Changes
# Requires Administrative Privileges

Write-Host "[+] Initiating Emergency Data Breach Audit..." -ForegroundColor Cyan

# 1. Identify users with active sessions on the host
Write-Host "\n[+] Checking Active Sessions..." -ForegroundColor Yellow
$query = "SELECT * FROM Win32_LogonSession WHERE LogonType = 2 OR LogonType = 10"
Get-WmiObject -Query $query | ForEach-Object { 
    $logonId = $_.LogonId
    $user = (Get-WmiObject -Query "ASSOCIATORS OF {Win32_LogonSession='$logonId'} WHERE AssocClass=Win32_LoggedOnUser").Caption
    if ($user) { Write-Host "Active User: $user (LogonID: $logonId)" }
}

# 2. Hunt for recently created archives in common data paths
Write-Host "\n[+] Scanning for Recently Created Archives (Last 48h)..." -ForegroundColor Yellow
$paths = @("C:\Users\", "C:\Shared\", "D:\Data\")
$cutoffDate = (Get-Date).AddDays(-2)

foreach ($path in $paths) {
    if (Test-Path $path) {
        Get-ChildItem -Path $path -Recurse -Include *.zip,*.rar,*.7z -ErrorAction SilentlyContinue | 
        Where-Object { $_.CreationTime -gt $cutoffDate -or $_.LastWriteTime -gt $cutoffDate } | 
        Select-Object FullName, CreationTime, LastWriteTime, Length | 
        Format-Table -AutoSize
    }
}

Write-Host "\n[+] Audit Complete. Review output for anomalies." -ForegroundColor Green