{
  "family": "batlauncher",
  "sample_count": 3,
  "category": "ransomware",
  "description": "Trojan:Win32/Batlauncher is a highly relevant **Heuristic and Generic Detection** applied to malicious Windows Command/Batch scripts (`.bat` or `.cmd`). Rather than compiling complex C++ malware, attackers increasingly rely on these simple text-based scripts to bypass traditional antivirus signatures by executing built-in Windows administrative tools—a technique known as 'Living off the Land' (LotL).<br><br><b>Understanding Batlauncher (LotL Scripts)</b><br>To an end-user, executing a Batlauncher script usually results in a brief, flashing black command prompt window before the malicious action completes. For a security analyst, a Batlauncher detection highlights a reliance on native tools for exploitation (`T1059.003`). These scripts are heavily utilized by Initial Access Brokers to perform initial reconnaissance, disable Windows Defender, or download heavier payloads like Cobalt Strike or Ransomware.<br><br><b>Execution and Evasion Mechanics</b><br>Batlauncher scripts are often dropped by weaponized Office macros or delivered via spear-phishing links (`T1566.002`). The scripts themselves are heavily obfuscated (`T1027`), using excessive environment variables, string concatenation, and caret (`^`) insertion to make the script unreadable to static scanners but perfectly executable by `cmd.exe`. A typical script might use `bitsadmin.exe`, `certutil.exe`, or `powershell.exe` (`T1105`) to download a payload from a remote server, execute it, and then delete itself (`del %0`) to destroy evidence.<br><br><b>Indicators of Compromise & Impact</b><br>The impact depends on the downloaded payload. Host-based IoCs include EDR alerts for `cmd.exe` executing highly obfuscated command line strings, or `cmd.exe` spawning child processes like `powershell.exe` or `certutil.exe` with anomalous arguments. The presence of heavily obfuscated `.bat` files in the `%Temp%` directory is a definitive indicator.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1105",
    "T1027",
    "T1059.003"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1059.003",
      "name": "Command and Scripting Interpreter: Windows Command Shell",
      "tactic": "Execution"
    },
    {
      "id": "T1027",
      "name": "Obfuscated Files or Information (String manipulation and caret obfuscation)",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1105",
      "name": "Ingress Tool Transfer (Using certutil, bitsadmin, or PowerShell)",
      "tactic": "Command and Control"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint to prevent the script from successfully downloading its secondary payload or communicating with C2.",
    "Analyze EDR command-line telemetry to de-obfuscate the script's actions and determine what remote URLs it attempted to contact.",
    "If the script downloaded a secondary executable, immediately locate and quarantine that payload.",
    "Implement Application Control (like AppLocker or Windows Defender Application Control) to prevent standard users from executing `.bat` files."
  ],
  "what_to_avoid": [
    "Do not assume the threat is minor because it's 'just a script'; these scripts are the primary delivery mechanism for enterprise ransomware.",
    "Avoid relying solely on file hashes, as the obfuscation makes every script essentially unique."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}