{
  "family": "httpbot",
  "sample_count": 1,
  "category": "ransomware",
  "description": "Backdoor:Win32/Httpbot (or HTTP Bot) is a broad classification for botnet agents and Remote Access Trojans (RATs) that specifically utilize standard web protocols (HTTP and HTTPS) to communicate with their Command and Control (C2) servers (`T1071.001`). By disguising their malicious traffic as normal web browsing, Httpbot variants successfully bypass many traditional firewalls and basic network intrusion detection systems.<br><br><b>Understanding Httpbot (Web-Based C2)</b><br>To an end-user, the infection is entirely invisible; there are no pop-ups or signs of sluggishness. For a security team, an Httpbot detection indicates an endpoint is actively compromised and receiving instructions from an external attacker. This is a severe incident, as the bot can be instructed to download ransomware, steal data, or participate in Distributed Denial of Service (DDoS) attacks.<br><br><b>Execution and Evasion Mechanics</b><br>Httpbot typically arrives as a secondary payload dropped by a loader (like an Office macro or a drive-by download). It establishes persistence via Registry Run keys (`T1547.001`). Once active, it begins 'beaconing'—sending regular HTTP GET or POST requests to the C2 server. Attackers often format the C2 traffic to mimic legitimate APIs (e.g., sending JSON payloads, or hiding commands in base64-encoded strings within HTTP headers) (`T1027`). Modern variants almost exclusively use HTTPS, encrypting the traffic and forcing defenders to rely on SSL inspection or host-based logging to read the payload.<br><br><b>Indicators of Compromise & Impact</b><br>The impact is total loss of endpoint control. Host-based IoCs include unexpected executables running from `%AppData%` and maintaining long-running, periodic network connections. Network IoCs are critical: look for highly regular, repetitive HTTPS connections (beacons) originating from `svchost.exe` (if injected) or unknown binaries, especially to newly registered domains or IP addresses lacking a legitimate reputation.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Httpbot and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Httpbot is classified as a Ransomware. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments."
      }
    },
    {
      "@type": "Question",
      "name": "How does Httpbot establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Httpbot typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks."
      }
    },
    {
      "@type": "Question",
      "name": "What are the essential incident response steps for mitigating a Httpbot compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Httpbot should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups."
      }
    },
    {
      "@type": "Question",
      "name": "What cryptographic algorithms and file targeting techniques does Httpbot employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Httpbot typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options."
      }
    },
    {
      "@type": "Question",
      "name": "Are decryptors available for Httpbot, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Httpbot depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1547.001",
    "T1055",
    "T1071.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1071.001",
      "name": "Application Layer Protocol: Web Protocols (Using HTTP/HTTPS for Command and Control)",
      "tactic": "Command and Control"
    },
    {
      "id": "T1547.001",
      "name": "Boot or Logon Autostart Execution: Registry Run Keys (Persistence mechanism)",
      "tactic": "Persistence"
    },
    {
      "id": "T1055",
      "name": "Process Injection (Often injecting into legitimate browser processes to further mask traffic)",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint immediately to cut off the attacker's control and prevent the deployment of secondary payloads.",
    "Analyze network proxy or firewall logs to identify the specific C2 domain or IP address the bot was communicating with.",
    "Block the identified C2 infrastructure enterprise-wide.",
    "Perform a full forensic review of the endpoint to determine what commands were executed while the bot was active (e.g., data exfiltration)."
  ],
  "what_to_avoid": [
    "Do not assume the network is safe just because traffic is flowing over port 443 (HTTPS); attackers leverage encryption to hide their C2 channels.",
    "Avoid leaving the machine on the network to 'monitor' the bot; the attacker could pivot laterally at any moment."
  ],
  "target_industries": [
    "Healthcare",
    "Critical Infrastructure",
    "Enterprise"
  ],
  "motivation": "Financial Extortion",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "defense_evasion",
    "impact"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}