{
  "family": "sqlcrack",
  "sample_count": 2,
  "category": "ransomware",
  "description": "HackTool:Win32/Sqlcrack is a detection for specialized offensive security tools and brute-force utilities designed to compromise backend databases, predominantly Microsoft SQL Server (MSSQL). While security professionals use similar tools for penetration testing, Sqlcrack detections almost universally indicate malicious lateral movement within a compromised network. Threat actors use these tools to discover unpatched database servers (`T1046`), brute-force administrative credentials (`T1110.001`), and subsequently execute arbitrary code or deploy ransomware across the domain.<br><br><b>Understanding Sqlcrack (Database Exploitation Tools)</b><br>To an end-user, the execution of this tool is invisible. For a security operations center (SOC), a Sqlcrack detection on an internal endpoint is a 'hair-on-fire' alert. It means an attacker has already bypassed the perimeter, established a foothold, and is actively seeking to compromise the organization's most critical data repositories.<br><br><b>Execution and Exploitation Mechanics</b><br>Attackers typically deploy Sqlcrack tools (which may be custom binaries, Python scripts, or PowerShell modules) after gaining initial access via phishing or RDP compromise. The tool rapidly scans the internal subnet for port 1433 (default MSSQL). Once a target is found, it employs dictionary attacks or credential stuffing against the default `sa` (System Administrator) account (`T1110.001`). If successful, the tool leverages the `xp_cmdshell` extended stored procedure (`T1505.001`) to execute shell commands directly on the underlying Windows OS of the database server, granting the attacker full system control to dump data or deploy ransomware.<br><br><b>Indicators of Compromise & Impact</b><br>The impact is the total compromise of the database server, leading to massive data exfiltration or catastrophic ransomware deployment. Host-based IoCs on the source machine include the presence of the brute-force tool and associated password dictionary files (e.g., `passwords.txt`). EDR telemetry on the *target* database server is critical: look for massive spikes in 'Failed Login' events (Event ID 4625) followed by a 'Successful Login' (Event ID 4624) from an unusual internal IP, and the sudden enabling and execution of `xp_cmdshell`.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1110.001",
    "T1046",
    "T1505.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1110.001",
      "name": "Brute Force: Password Guessing (Attacking the 'sa' account)",
      "tactic": "Credential Access"
    },
    {
      "id": "T1046",
      "name": "Network Service Discovery (Scanning for port 1433)",
      "tactic": "Discovery"
    },
    {
      "id": "T1505.001",
      "name": "Server Software Component: SQL Stored Procedures (Abusing xp_cmdshell)",
      "tactic": "Persistence"
    }
  ],
  "containment_steps": [
    "Immediately isolate both the source machine running the Sqlcrack tool and the targeted MSSQL server to prevent further lateral movement.",
    "Review MSSQL authentication logs (or Windows Event Logs) to determine if the brute-force attack was successful.",
    "If compromised, immediately disable the `sa` account, rotate all database service account passwords, and disable `xp_cmdshell`.",
    "Conduct a full forensic analysis of the compromised database server to determine what data was accessed or if ransomware staged."
  ],
  "what_to_avoid": [
    "Do not assume the attack failed just because the AV caught the tool on one machine; the attacker may be running it from multiple compromised endpoints.",
    "Avoid leaving the default `sa` account enabled or allowing MSSQL servers to be accessible from non-administrative network segments."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}