{
  "family": "passwordstealer",
  "sample_count": 7,
  "category": "ransomware",
  "description": "Trojan:Win32/Passwordstealer (or PWS) is a generic heuristic detection used by antivirus engines to classify a massive category of malware exclusively designed to covertly harvest user credentials, session tokens, and financial data. **Infostealers** are currently one of the most prolific threats globally, heavily utilized by Initial Access Brokers (IABs) who steal corporate VPN credentials and sell them to ransomware cartels on the dark web.<br><br><b>Understanding Infostealers</b><br>To an end-user, an infostealer infection is completely invisible; the computer functions normally while their digital identity is stripped. For a security analyst, an infostealer detection is a critical emergency. It means all passwords, cookies, and crypto-wallets stored on that machine are compromised. Prominent examples of infostealer families include RedLine, Raccoon, Vidar, and LummaC2.<br><br><b>Execution and Harvesting Mechanics</b><br>Infostealers are distributed via cracked software, YouTube 'tutorial' descriptions, phishing, and malvertising. Upon execution (`T1204.002`), the malware acts incredibly fast, often completing its theft and deleting itself within seconds. It targets specific browser directories (e.g., `AppData\\Local\\Google\\Chrome\\User Data\\Default`) to extract the `Login Data` SQLite database and the `Cookies` file (`T1555.003`). Because modern browsers encrypt these databases using the Windows Data Protection API (DPAPI), the malware injects code to decrypt the passwords locally (`T1555`). It also targets cryptocurrency wallet extensions (like MetaMask) and FTP clients. It packages this data into a ZIP file and exfiltrates it to a Telegram bot or C2 server (`T1041`).<br><br><b>Indicators of Compromise & Impact</b><br>The primary impact is the total compromise of all credentials stored on the endpoint. Host-based IoCs include EDR alerts for rapid, sequential file access of multiple SQLite databases across all installed browsers, often accompanied by attempts to interact with `crypt32.dll` (for DPAPI decryption). Network IoCs include a sudden, short burst of outbound encrypted traffic (the exfiltration of the data archive) to unknown IP addresses or Telegram API endpoints.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Passwordstealer and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Passwordstealer 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 Passwordstealer establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Passwordstealer 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 Passwordstealer compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Passwordstealer 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 Passwordstealer employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Passwordstealer 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 Passwordstealer, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Passwordstealer 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": [
    "T1552.001",
    "T1056.004",
    "T1041",
    "T1555.003"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1555.003",
      "name": "Credentials from Password Stores: Credentials from Web Browsers",
      "tactic": "Credential Access"
    },
    {
      "id": "T1041",
      "name": "Exfiltration Over C2 Channel",
      "tactic": "Exfiltration"
    },
    {
      "id": "T1552.001",
      "name": "Credentials In Files (Stealing crypto wallets and FTP configs)",
      "tactic": "Credential Access"
    },
    {
      "id": "T1056.004",
      "name": "Input Capture: Credential API Hooking (DPAPI decryption)",
      "tactic": "Credential Access"
    }
  ],
  "containment_steps": [
    "Assume all credentials, session cookies, and VPN tokens stored on the compromised endpoint have been stolen by the adversary.",
    "Immediately force a password reset for all corporate accounts associated with the user, and revoke all active session tokens.",
    "Instruct the user to reset all personal passwords (banking, email, social media) from a known-clean, secondary device.",
    "Isolate the endpoint and deploy EDR to identify the initial delivery vector (e.g., a cracked software installer)."
  ],
  "what_to_avoid": [
    "Do not allow the user back onto the corporate network simply by changing their password; the stolen session cookies can bypass MFA.",
    "Avoid assuming the threat is gone because the AV deleted the executable; most modern stealers are 'grab-and-go' and delete themselves after exfiltration anyway."
  ],
  "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"
  ]
}