{
  "family": "blackhole",
  "sample_count": 14,
  "category": "ransomware",
  "description": "Exploit:JS/Blackhole (or Blacole) refers to the infamous Blackhole Exploit Kit (BHEK), one of the most prolific and devastating Exploit-as-a-Service platforms of the early 2010s. Created by a threat actor known as 'Paunch', Blackhole revolutionized malware distribution by providing cybercriminals with a polished, commercialized web interface to automate the delivery of 'drive-by download' attacks against unsuspecting web browsers.<br><br><b>Understanding the Blackhole Exploit Kit</b><br>To a victim, a Blackhole infection required no action other than visiting a compromised website (or clicking a link in a spam email). If their browser, Java, Adobe Reader, or Flash Player was out of date, they were instantly infected. For a security analyst, Blackhole represents the industrialization of exploitation. Attackers (customers) simply rented access to a Blackhole server and provided their malware payload (e.g., ZeuS, CryptoLocker). The Blackhole kit handled the rest: fingerprinting the victim's browser, selecting the appropriate zero-day or known exploit, and silently delivering the payload.<br><br><b>Execution and Exploitation Mechanics</b><br>The attack chain begins with traffic redirection. Legitimate, compromised websites (or malvertising networks) are injected with hidden IFRAMEs or malicious JavaScript (`T1189`). When a victim visits the site, they are silently redirected to a Blackhole landing page. The landing page heavily obfuscates its JavaScript (`T1027`) and profiles the victim's environment (`T1082`), checking browser versions and installed plugins. Based on this profile, Blackhole serves a highly targeted exploit—often targeting vulnerabilities in Java (CVE-2012-0507), Adobe Acrobat (CVE-2010-0188), or Flash (`T1190`). If the exploit is successful, a shellcode executes, downloading and running the customer's payload (the trojan or ransomware) in the background (`T1105`).<br><br><b>Indicators of Compromise & Impact</b><br>The impact was massive, leading to millions of banking trojan and early ransomware infections worldwide. Network defenders would observe complex, multi-stage HTTP redirects (often utilizing highly obfuscated URLs and fast-flux DNS) culminating in the download of a JAR, PDF, or SWF file, immediately followed by the download of an executable payload. EDR logs would flag browser processes (like `iexplore.exe` or `java.exe`) abruptly spawning unexpected child processes (`cmd.exe` or the downloaded malware).",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1105",
    "T1190",
    "T1082",
    "T1189",
    "T1027"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1189",
      "name": "Drive-by Compromise",
      "tactic": "Initial Access"
    },
    {
      "id": "T1190",
      "name": "Exploit Public-Facing Application (Browser/Plugin Exploitation)",
      "tactic": "Initial Access"
    },
    {
      "id": "T1082",
      "name": "System Information Discovery (Environment Profiling)",
      "tactic": "Discovery"
    },
    {
      "id": "T1027",
      "name": "Obfuscated Files or Information (JavaScript Obfuscation)",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1105",
      "name": "Ingress Tool Transfer (Payload Delivery)",
      "tactic": "Command and Control"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint; a successful Exploit Kit trigger means a secondary, highly severe payload (like a banking trojan or ransomware) has already executed.",
    "Analyze web proxy and DNS logs to trace the redirect chain back to the initially compromised website or malvertising domain, and block those domains enterprise-wide.",
    "Capture a forensic image of the endpoint to analyze the specific exploit used and the dropped payload.",
    "Aggressively patch all web browsers, Java, Adobe Reader, and Flash Player across the enterprise, as Exploit Kits rely entirely on unpatched software."
  ],
  "what_to_avoid": [
    "Do not assume the user intentionally downloaded malware; Exploit Kit infections are 'drive-by' and require zero user interaction beyond loading a webpage.",
    "Avoid focusing solely on the downloaded `.exe` payload; you must investigate the network logs to understand *how* the Exploit Kit gained execution via the browser."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}