{
  "family": "socstealer",
  "sample_count": 3,
  "category": "trojan",
  "description": "Trojan:Win32/Socstealer is a specialized form of spyware designed exclusively to harvest credentials and session tokens for major social media platforms (such as Facebook, Twitter/X, Instagram, and Discord). Unlike generic keyloggers, Socstealer represents a targeted approach to data theft, aiming to hijack valuable online identities for use in further social engineering, spam campaigns, or extortion.<br><br><b>Understanding Socstealer</b><br>To an end-user, a Socstealer infection is invisible. The user will only realize they have been compromised when they are suddenly locked out of their accounts, or when their friends begin receiving malicious links sent from their profiles. For a security analyst, Socstealer highlights the critical importance of protecting browser session data, as modern stealers often bypass Multi-Factor Authentication (MFA) by stealing the active session cookie rather than just the password.<br><br><b>Execution and Exfiltration Mechanics</b><br>Socstealer is typically distributed via phishing links sent over the very platforms it targets (e.g., a direct message on Discord containing a malicious executable disguised as a game) (`T1566.001`). Upon execution, it establishes persistence via the Registry Run keys (`T1547.001`). The malware's core function is to query the local databases (SQLite files) used by popular web browsers (Chrome, Edge, Firefox) (`T1555.003`). It specifically targets the cookies associated with social media domains. By extracting these active session tokens, the attacker can import them into their own browser and instantly assume the victim's identity without ever triggering an MFA prompt (`T1539`). The stolen database files are packed into an archive and exfiltrated to a C2 server via HTTP POST or directly to an attacker-controlled Telegram bot (`T1048.003`).<br><br><b>Indicators of Compromise & Impact</b><br>The impact is the complete loss of control over digital identities and potential reputational damage. Host-based IoCs include EDR alerts for unknown processes (often running from `%AppData%`) accessing sensitive browser files like `Cookies` or `Login Data`. Network IoCs involve outbound HTTPS traffic containing large POST requests to unknown IPs or Telegram API endpoints (`api.telegram.org`) immediately after execution.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Socstealer and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Socstealer is classified as a Trojan. 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 Socstealer establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Socstealer 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 Socstealer compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Socstealer 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 secondary payloads and staging behaviors are commonly associated with Socstealer?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Socstealer frequently operates as a loader or dropper designed to establish a foothold before downloading and executing secondary high-impact malware payloads. Depending on the threat actor's objectives, these dropped modules can range from ransomware and banking injects to modular infostealers and remote management backdoors."
      }
    },
    {
      "@type": "Question",
      "name": "How can security operations teams effectively detect and hunt for Socstealer across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Socstealer by deploying behavioral endpoint detection and response (EDR) rules that monitor suspicious process spawning (such as cmd.exe or powershell.exe spawned from office documents or temporary directories), anomalous outbound network connections from non-browser binaries, and unauthorized modifications to Windows Run keys and scheduled task registries."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1048.003",
    "T1555.003",
    "T1539",
    "T1547.001"
  ],
  "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": "T1539",
      "name": "Steal Web Session Cookie (Bypassing MFA)",
      "tactic": "Credential Access"
    },
    {
      "id": "T1048.003",
      "name": "Exfiltration Over Alternative Protocol (Exfiltration via Telegram API)",
      "tactic": "Exfiltration"
    },
    {
      "id": "T1547.001",
      "name": "Boot or Logon Autostart Execution",
      "tactic": "Persistence"
    }
  ],
  "containment_steps": [
    "Immediately isolate the infected endpoint from the network to halt the exfiltration of browser data.",
    "Instruct the user to log into their social media accounts from a known-clean device and immediately click 'Log out of all other sessions'. This invalidates the stolen cookies.",
    "Instruct the user to change all their passwords, prioritizing accounts that were saved in the infected browser.",
    "Scan the machine to identify and remove the Socstealer binary and its persistence mechanisms."
  ],
  "what_to_avoid": [
    "Do not assume MFA will protect the user; if the session cookie is stolen, the attacker bypasses the password and the 2FA prompt entirely.",
    "Avoid allowing users to use corporate devices for personal social media browsing if the risk of credential theft is high."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}