{
  "family": "smsspy",
  "sample_count": 1,
  "category": "trojan",
  "description": "TrojanSpy:AndroidOS/Smsspy (or Win32 variants targeting mobile emulators/connected devices) is a specialized spyware focused entirely on intercepting and exfiltrating Short Message Service (SMS) data (`T1114.001`). Its primary, critical function is to bypass Multi-Factor Authentication (MFA) by silently reading the One-Time Passwords (OTPs) sent by banks during fraudulent transactions.<br><br><b>Understanding Smsspy (2FA Interceptors)</b><br>To an end-user, the infection is often unnoticed until they receive a notification of a cleared bank account. The SMS messages containing the authentication codes are often hidden from the user's inbox by the malware. For security teams, Smsspy highlights the inherent weakness of SMS-based 2FA against targeted banking attacks.<br><br><b>Execution and Interception Mechanics</b><br>Smsspy is typically distributed via third-party app stores, deceptive 'security update' SMS links (Smishing), or dropped by a primary banking trojan. Once installed, it requests the `READ_SMS` and `RECEIVE_SMS` Android permissions (`T1624`). It then establishes a background service to monitor all incoming messages. When a message arrives matching specific regex patterns (e.g., containing 'code', 'OTP', or originating from known bank shortcodes), it immediately exfiltrates the contents via HTTP/HTTPS to the attacker's C2 server (`T1041`), often deleting or marking the message as read locally to hide the activity from the victim.<br><br><b>Indicators of Compromise & Impact</b><br>The impact is the total compromise of SMS-based MFA and potential severe financial loss. IoCs include unexpected apps possessing SMS-reading permissions, rapid battery drain, and network logs showing background HTTP POST requests immediately following the receipt of an SMS message.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Smsspy and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Smsspy 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 Smsspy establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Smsspy 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 Smsspy compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Smsspy 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 Smsspy?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Smsspy 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 Smsspy across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Smsspy 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": [
    "T1624",
    "T1114.001",
    "T1041"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1114.001",
      "name": "Email Collection: Local Email Collection (Adapted for SMS interception to steal OTPs)",
      "tactic": "Collection"
    },
    {
      "id": "T1624",
      "name": "Location and Audio/Video Capture (Adapted for requesting excessive SMS permissions)",
      "tactic": "Collection"
    },
    {
      "id": "T1041",
      "name": "Exfiltration Over C2 Channel (Sending intercepted SMS codes to the attacker in real-time)",
      "tactic": "Exfiltration"
    }
  ],
  "containment_steps": [
    "Immediately disable the device's cellular connection (turn on Airplane Mode) to prevent further SMS interception and exfiltration.",
    "Contact financial institutions immediately to freeze accounts and report that SMS-based 2FA has been compromised.",
    "Identify and uninstall the malicious application granting itself SMS permissions (check Settings -> Apps -> Permissions).",
    "Transition all critical accounts from SMS-based 2FA to app-based authenticators (like Google Authenticator) or hardware keys (YubiKey)."
  ],
  "what_to_avoid": [
    "Do not assume a transaction is safe just because SMS 2FA is enabled; Smsspy exists specifically to defeat this mechanism.",
    "Avoid downloading applications from outside official app stores, as this is the primary delivery method for mobile spyware."
  ],
  "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"
  ]
}