{
  "type": "URL",
  "indicator": "https://www.gstatic.com/feedback/js/",
  "general": {
    "sections": [
      "general",
      "url_list",
      "http_scans",
      "screenshot"
    ],
    "indicator": "https://www.gstatic.com/feedback/js/",
    "type": "url",
    "type_title": "URL",
    "validation": [
      {
        "source": "alexa",
        "message": "Alexa rank: #511",
        "name": "Listed on Alexa"
      },
      {
        "source": "akamai",
        "message": "Akamai rank: #14",
        "name": "Akamai Popular Domain"
      },
      {
        "source": "whitelist",
        "message": "Whitelisted domain gstatic.com",
        "name": "Whitelisted domain"
      },
      {
        "source": "majestic",
        "message": "Whitelisted domain gstatic.com",
        "name": "Whitelisted domain"
      }
    ],
    "base_indicator": {
      "id": 4212599756,
      "indicator": "https://www.gstatic.com/feedback/js/",
      "type": "URL",
      "title": "",
      "description": "",
      "content": "",
      "access_type": "public",
      "access_reason": ""
    },
    "pulse_info": {
      "count": 3,
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        {
          "id": "6992bae83a5988dff8311490",
          "name": "Distributed Credential Exhaustion & C2 Orchestration via Golang-Based StealthWorker (ELF.Agent-VW)",
          "description": "Researcher credit: msudosos, level blue platform----\nThis artifact represents a high-integrity StealthWorker (GoBrut) botnet agent, architected as a statically linked, stripped 32-bit ELF binary to ensure cross-platform environmental independence. The sample utilizes XOR 0x20-encoded JavaScript payloads and String.fromCharCode obfuscation to mask its internal logic and bypass heuristic-based memory scanners. [User Notes] Its operational core is a multi-threaded service bruter targeting SSH, MySQL, and CMS backends, leveraging a massive infrastructure of 1,834 domains and 797 unique IPv4 endpoints for decentralized Command & Control (C2). Network telemetry confirms the use of ICMP and HTTP-based beaconing, indicating a sophisticated retry logic designed to maintain persistence across diverse network topologies. With a malicious file score of 10, this binary serves as a primary vector for large-scale credential harvesting and the subsequent integration of Linux infrastructure into global botnet clusters.",
          "modified": "2026-04-13T23:46:20.071000",
          "created": "2026-02-16T06:36:24.788000",
          "tags": [
            "Obfuscation: XOR-based String Encryption (0x20)",
            "T1110.001 (Brute Force: Password Guessing)",
            "Primary Hash (SHA256): cd3989830da99a69380901769fd78902efb3cd8ba",
            "MD5 Hash: f8add7e7161460ea2b1970cf4ca535bf",
            "#PotentialUS-Origin_FalseFlag_Obfuscation"
          ],
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            "Primary Hash (SHA256): cd3989830da99a69380901769fd78902efb3cd8ba5c9390e94bd4333b7fad186",
            "Obfuscation: XOR-based String Encryption (0x20)",
            "T1110.001 (Brute Force: Password Guessing)",
            "This ELF 32-bit LSB artifact is a sophisticated GoBrut/StealthWorker agent, compiled via Golang 1.10 and stripped to obfuscate its high-velocity service-bruting logic. VirusTotal confirms a critical threat profile with 44/65 security vendors flagging the file, which leverages a unique Go BuildID (nGYES3pajdOm...) and a Telfhash (t1f303a0...) for architectural fingerprinting. The binary orchestrates decentralized Command and Control (C2) through an expansive infrastructure of 797 unique IPs and 1,834 domains",
            "Pivot-Ready Indicators (IOCs) Go BuildID: nGYES3pajdOmKy1i6Ghh/KO9ydOtZpXtoKtB0KHE-/iisNoniHgTbj_cV6M-uk/XmMYzkBiZs8NXMRZYTiT Telfhash: t1f303a0b3055d54e8b7f08907c7af7624cef6e0f726d078f169e278d09a72c826626874 Imphash: 9698f46495ce9401c8bcaf9a2afe1598 Vhash: 1e53f1a1b59ecb93f821c74b25d81e9f",
            "Researcher msudosos posits a strategic exploitation of Root Certificate Validation Failures, where the adversary leverages an expired trust chain to bypass heuristic security filters and establish persistence.",
            "his technique allows the GoBrut/StealthWorker agent to circumvent automated revocation checks, enabling its decentralized C2 infrastructure to recruit Linux hosts via high-velocity credential exhaustion.",
            "The local environment exhibits advanced telemetry suppression within specialized skim memory regions, effectively neutralizing standard DMARC validation and Microsoft-integrated defensive protocols.",
            "By maintaining a hollowed root posture, the sample facilitates persistent, low-signal synchronization with external cloud infrastructure while bypassing traditional heuristic trust-chain verification.",
            "The domain prioritywirreles.com (registered via NAMECHEAP INC) shows a 4/93 detection ratio, confirming it is a live but \"low-noise\" C2 node used to avoid broad-spectrum blacklisting",
            "",
            "The environment leverages prioritywirreles.com as a high-fidelity DGA-derived C2 node, utilizing its historical resolution to Russian-hosted IP space (194.61.24.231) to maintain persistent Stealthworker botnet synchronization.",
            "By operating through WhoisGuard-protected infrastructure and exploiting XOR 0x20 obfuscation, the adversary effectively suppresses telemetry into skim space, successfully bypassing DMARC and Microsoft-integrated trust-chain validation.",
            "The pivot from cd398983... to this domain confirms a multi-year campaign (2019\u20132023) utilizing Namecheap-registered infrastructure to orchestrate wide-scale T1110.001 brute-force operations while bypassing standard PKI expiration checks.",
            "LBresearcher: msudosos notes: The campaign's use of T1110.001 (Password Guessing) is specifically tuned to exhaust credentials across SSH, MySQL, and CMS backends, effectively recruiting server infrastructure into a global \"zombie\" network.",
            "LBresearcher: msudosos notes: The threat actor maintains operational longevity by rotating through WhoisGuard-protected nodes like prioritywirreles.com, which historically resolved to Russian-hosted IP space (194.61.24.231) to obfuscate its origin.",
            "LBresearcher: msudosos notes: By exploiting Root Certificate Validation Failures, the StealthWorker (GoBrut) agent ensures that its 32-bit ELF binaries bypass the automated reputation checks enforced by major cloud providers.",
            "Monitor DGA Shifts: Track new domains registered through NAMECHEAP INC using the current WhoisGuard patterns to identify the next cluster before it goes active. Analyze Telfhash Clusters: Use the Telfhash (t1f303a0...) to pivot and find if the adversary has updated to 64-bit ELF or ARM architectures. Harden DMARC: Ensure your environment moves from \"p=none\" to \"p=reject\" to mitigate the internal spoofing loops exploited by this botnet's telemetry suppression.",
            "Persistent C2 Orchestration: This ELF:Agent-VW variant serves as a critical GoBrut node, utilizing XOR 0x20 obfuscation and ICMP/HTTP beaconing to maintain a persistent link across 1,834 domains and 797 unique IPs",
            "Researcher msudosos: This activity appears to facilitate a preliminary reconnaissance phase, possibly utilizing system commands to query /proc/cpuinfo and /proc/version for architectural profiling purposes.",
            "Researcher msudosos suggests the VirusTotal (Tencent HABO) behavior report may indicate a potential execution path from volatile storage at /tmp/EB93A6/996E.elf.",
            "Msudosos Regional Notes: While historical pivots show Russian-hosted nodes, the current dual-origin telemetry\u2014dominated by 181 United States-based endpoints\u2014strongly suggests a domestic-aligned adversary leveraging global 'grey space' to obfuscate its operational core. This massive US-centric footprint (exceeding all other regions combined) reinforces the theory of a false-flag orchestration designed to divert attribution toward foreign infrastructure while abusing legitimate Western-hosted trust chains.",
            "WHOIS data anchors administrative and technical operations for prioritywirreles.com in Los Angeles, CA (90064) via Namecheap infrastructure. Following its 2020 expiration, the domain has transitioned into redemptionPeriod/pendingDelete status, signaling the formal decommissioning of this C2 asset."
          ],
          "public": 1,
          "adversary": "StealthWorker/GoBrut (The adversary demonstrates advanced telemetry suppression within specialized s",
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              "id": "Malware Family: StealthWorker / GoBrut",
              "display_name": "Malware Family: StealthWorker / GoBrut",
              "target": "/malware/Malware Family: StealthWorker / GoBrut"
            },
            {
              "id": "MD5 Hash: f8add7e7161460ea2b1970cf4ca535bf",
              "display_name": "MD5 Hash: f8add7e7161460ea2b1970cf4ca535bf",
              "target": null
            }
          ],
          "attack_ids": [
            {
              "id": "T1001",
              "name": "Data Obfuscation",
              "display_name": "T1001 - Data Obfuscation"
            }
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          "TLP": "green",
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          "pulse_source": "web",
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          "author": {
            "username": "msudosos",
            "id": "381696",
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          "indicator_type_counts": {
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            "domain": 13295,
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          "modified_text": "6 days ago ",
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        {
          "id": "69ca3c8885ac1cb3171429a3",
          "name": "Untitled.",
          "description": "A full report on Google's security system, based on data gathered from 1,000 of its users' accounts, has been published by the Google Research Institute (GPRI) in the US.",
          "modified": "2026-03-31T21:23:41.012000",
          "created": "2026-03-30T09:04:08.040000",
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            "log id",
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          "TLP": "green",
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          "author": {
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            "is_subscribed": false,
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          "indicator_type_counts": {
            "FileHash-MD5": 379,
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            "SSLCertFingerprint": 2,
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          },
          "indicator_count": 1010,
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          "modified_text": "19 days ago ",
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          "related_indicator_type": "URL",
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        },
        {
          "id": "69ca3c89851a1aa0bf0185ff",
          "name": "Untitled.",
          "description": "A full report on Google's security system, based on data gathered from 1,000 of its users' accounts, has been published by the Google Research Institute (GPRI) in the US.",
          "modified": "2026-03-31T09:12:52.080000",
          "created": "2026-03-30T09:04:09.024000",
          "tags": [
            "log id",
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            "google trust",
            "ca issuers",
            "b0n timestamp",
            "pulse pulses",
            "http",
            "pulses otx",
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            "url https",
            "hostname",
            "filehashsha256",
            "source url"
          ],
          "references": [],
          "public": 1,
          "adversary": "",
          "targeted_countries": [],
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          "industries": [],
          "TLP": "green",
          "cloned_from": null,
          "export_count": 1,
          "upvotes_count": 0,
          "downvotes_count": 0,
          "votes_count": 0,
          "locked": false,
          "pulse_source": "web",
          "validator_count": 0,
          "comment_count": 0,
          "follower_count": 0,
          "vote": 0,
          "author": {
            "username": "msudosos",
            "id": "381696",
            "avatar_url": "https://otx.alienvault.com/assets/images/default-avatar.png",
            "is_subscribed": false,
            "is_following": false
          },
          "indicator_type_counts": {
            "FileHash-MD5": 118,
            "FileHash-SHA256": 166,
            "SSLCertFingerprint": 6,
            "domain": 68,
            "hostname": 90,
            "IPv4": 9,
            "URL": 118,
            "FileHash-SHA1": 106,
            "email": 1
          },
          "indicator_count": 682,
          "is_author": false,
          "is_subscribing": null,
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          "modified_text": "19 days ago ",
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          "groups": [],
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          "threat_hunter_scannable": true,
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          "related_indicator_type": "URL",
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        }
      ],
      "references": [
        "",
        "T1110.001 (Brute Force: Password Guessing)",
        "Obfuscation: XOR-based String Encryption (0x20)",
        "Pivot-Ready Indicators (IOCs) Go BuildID: nGYES3pajdOmKy1i6Ghh/KO9ydOtZpXtoKtB0KHE-/iisNoniHgTbj_cV6M-uk/XmMYzkBiZs8NXMRZYTiT Telfhash: t1f303a0b3055d54e8b7f08907c7af7624cef6e0f726d078f169e278d09a72c826626874 Imphash: 9698f46495ce9401c8bcaf9a2afe1598 Vhash: 1e53f1a1b59ecb93f821c74b25d81e9f",
        "LBresearcher: msudosos notes: The campaign's use of T1110.001 (Password Guessing) is specifically tuned to exhaust credentials across SSH, MySQL, and CMS backends, effectively recruiting server infrastructure into a global \"zombie\" network.",
        "This ELF 32-bit LSB artifact is a sophisticated GoBrut/StealthWorker agent, compiled via Golang 1.10 and stripped to obfuscate its high-velocity service-bruting logic. VirusTotal confirms a critical threat profile with 44/65 security vendors flagging the file, which leverages a unique Go BuildID (nGYES3pajdOm...) and a Telfhash (t1f303a0...) for architectural fingerprinting. The binary orchestrates decentralized Command and Control (C2) through an expansive infrastructure of 797 unique IPs and 1,834 domains",
        "Primary Hash (SHA256): cd3989830da99a69380901769fd78902efb3cd8ba5c9390e94bd4333b7fad186",
        "WHOIS data anchors administrative and technical operations for prioritywirreles.com in Los Angeles, CA (90064) via Namecheap infrastructure. Following its 2020 expiration, the domain has transitioned into redemptionPeriod/pendingDelete status, signaling the formal decommissioning of this C2 asset.",
        "The domain prioritywirreles.com (registered via NAMECHEAP INC) shows a 4/93 detection ratio, confirming it is a live but \"low-noise\" C2 node used to avoid broad-spectrum blacklisting",
        "By maintaining a hollowed root posture, the sample facilitates persistent, low-signal synchronization with external cloud infrastructure while bypassing traditional heuristic trust-chain verification.",
        "Researcher msudosos suggests the VirusTotal (Tencent HABO) behavior report may indicate a potential execution path from volatile storage at /tmp/EB93A6/996E.elf.",
        "Persistent C2 Orchestration: This ELF:Agent-VW variant serves as a critical GoBrut node, utilizing XOR 0x20 obfuscation and ICMP/HTTP beaconing to maintain a persistent link across 1,834 domains and 797 unique IPs",
        "Monitor DGA Shifts: Track new domains registered through NAMECHEAP INC using the current WhoisGuard patterns to identify the next cluster before it goes active. Analyze Telfhash Clusters: Use the Telfhash (t1f303a0...) to pivot and find if the adversary has updated to 64-bit ELF or ARM architectures. Harden DMARC: Ensure your environment moves from \"p=none\" to \"p=reject\" to mitigate the internal spoofing loops exploited by this botnet's telemetry suppression.",
        "Researcher msudosos: This activity appears to facilitate a preliminary reconnaissance phase, possibly utilizing system commands to query /proc/cpuinfo and /proc/version for architectural profiling purposes.",
        "The local environment exhibits advanced telemetry suppression within specialized skim memory regions, effectively neutralizing standard DMARC validation and Microsoft-integrated defensive protocols.",
        "Researcher msudosos posits a strategic exploitation of Root Certificate Validation Failures, where the adversary leverages an expired trust chain to bypass heuristic security filters and establish persistence.",
        "The environment leverages prioritywirreles.com as a high-fidelity DGA-derived C2 node, utilizing its historical resolution to Russian-hosted IP space (194.61.24.231) to maintain persistent Stealthworker botnet synchronization.",
        "The pivot from cd398983... to this domain confirms a multi-year campaign (2019\u20132023) utilizing Namecheap-registered infrastructure to orchestrate wide-scale T1110.001 brute-force operations while bypassing standard PKI expiration checks.",
        "LBresearcher: msudosos notes: By exploiting Root Certificate Validation Failures, the StealthWorker (GoBrut) agent ensures that its 32-bit ELF binaries bypass the automated reputation checks enforced by major cloud providers.",
        "By operating through WhoisGuard-protected infrastructure and exploiting XOR 0x20 obfuscation, the adversary effectively suppresses telemetry into skim space, successfully bypassing DMARC and Microsoft-integrated trust-chain validation.",
        "LBresearcher: msudosos notes: The threat actor maintains operational longevity by rotating through WhoisGuard-protected nodes like prioritywirreles.com, which historically resolved to Russian-hosted IP space (194.61.24.231) to obfuscate its origin.",
        "his technique allows the GoBrut/StealthWorker agent to circumvent automated revocation checks, enabling its decentralized C2 infrastructure to recruit Linux hosts via high-velocity credential exhaustion.",
        "Msudosos Regional Notes: While historical pivots show Russian-hosted nodes, the current dual-origin telemetry\u2014dominated by 181 United States-based endpoints\u2014strongly suggests a domestic-aligned adversary leveraging global 'grey space' to obfuscate its operational core. This massive US-centric footprint (exceeding all other regions combined) reinforces the theory of a false-flag orchestration designed to divert attribution toward foreign infrastructure while abusing legitimate Western-hosted trust chains."
      ],
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        "alienvault": {
          "adversary": [],
          "malware_families": [],
          "industries": [],
          "unique_indicators": 0
        },
        "other": {
          "adversary": [
            "StealthWorker/GoBrut (The adversary demonstrates advanced telemetry suppression within specialized s"
          ],
          "malware_families": [
            "Malware family: stealthworker / gobrut",
            "Md5 hash: f8add7e7161460ea2b1970cf4ca535bf"
          ],
          "industries": [],
          "unique_indicators": 24121
        }
      }
    },
    "false_positive": [],
    "alexa": "http://www.alexa.com/siteinfo/gstatic.com",
    "whois": "http://whois.domaintools.com/gstatic.com",
    "domain": "gstatic.com",
    "hostname": "www.gstatic.com"
  },
  "geo": {},
  "geo_ipapicom": {},
  "pulse_count": 3,
  "pulses": [
    {
      "id": "6992bae83a5988dff8311490",
      "name": "Distributed Credential Exhaustion & C2 Orchestration via Golang-Based StealthWorker (ELF.Agent-VW)",
      "description": "Researcher credit: msudosos, level blue platform----\nThis artifact represents a high-integrity StealthWorker (GoBrut) botnet agent, architected as a statically linked, stripped 32-bit ELF binary to ensure cross-platform environmental independence. The sample utilizes XOR 0x20-encoded JavaScript payloads and String.fromCharCode obfuscation to mask its internal logic and bypass heuristic-based memory scanners. [User Notes] Its operational core is a multi-threaded service bruter targeting SSH, MySQL, and CMS backends, leveraging a massive infrastructure of 1,834 domains and 797 unique IPv4 endpoints for decentralized Command & Control (C2). Network telemetry confirms the use of ICMP and HTTP-based beaconing, indicating a sophisticated retry logic designed to maintain persistence across diverse network topologies. With a malicious file score of 10, this binary serves as a primary vector for large-scale credential harvesting and the subsequent integration of Linux infrastructure into global botnet clusters.",
      "modified": "2026-04-13T23:46:20.071000",
      "created": "2026-02-16T06:36:24.788000",
      "tags": [
        "Obfuscation: XOR-based String Encryption (0x20)",
        "T1110.001 (Brute Force: Password Guessing)",
        "Primary Hash (SHA256): cd3989830da99a69380901769fd78902efb3cd8ba",
        "MD5 Hash: f8add7e7161460ea2b1970cf4ca535bf",
        "#PotentialUS-Origin_FalseFlag_Obfuscation"
      ],
      "references": [
        "Primary Hash (SHA256): cd3989830da99a69380901769fd78902efb3cd8ba5c9390e94bd4333b7fad186",
        "Obfuscation: XOR-based String Encryption (0x20)",
        "T1110.001 (Brute Force: Password Guessing)",
        "This ELF 32-bit LSB artifact is a sophisticated GoBrut/StealthWorker agent, compiled via Golang 1.10 and stripped to obfuscate its high-velocity service-bruting logic. VirusTotal confirms a critical threat profile with 44/65 security vendors flagging the file, which leverages a unique Go BuildID (nGYES3pajdOm...) and a Telfhash (t1f303a0...) for architectural fingerprinting. The binary orchestrates decentralized Command and Control (C2) through an expansive infrastructure of 797 unique IPs and 1,834 domains",
        "Pivot-Ready Indicators (IOCs) Go BuildID: nGYES3pajdOmKy1i6Ghh/KO9ydOtZpXtoKtB0KHE-/iisNoniHgTbj_cV6M-uk/XmMYzkBiZs8NXMRZYTiT Telfhash: t1f303a0b3055d54e8b7f08907c7af7624cef6e0f726d078f169e278d09a72c826626874 Imphash: 9698f46495ce9401c8bcaf9a2afe1598 Vhash: 1e53f1a1b59ecb93f821c74b25d81e9f",
        "Researcher msudosos posits a strategic exploitation of Root Certificate Validation Failures, where the adversary leverages an expired trust chain to bypass heuristic security filters and establish persistence.",
        "his technique allows the GoBrut/StealthWorker agent to circumvent automated revocation checks, enabling its decentralized C2 infrastructure to recruit Linux hosts via high-velocity credential exhaustion.",
        "The local environment exhibits advanced telemetry suppression within specialized skim memory regions, effectively neutralizing standard DMARC validation and Microsoft-integrated defensive protocols.",
        "By maintaining a hollowed root posture, the sample facilitates persistent, low-signal synchronization with external cloud infrastructure while bypassing traditional heuristic trust-chain verification.",
        "The domain prioritywirreles.com (registered via NAMECHEAP INC) shows a 4/93 detection ratio, confirming it is a live but \"low-noise\" C2 node used to avoid broad-spectrum blacklisting",
        "",
        "The environment leverages prioritywirreles.com as a high-fidelity DGA-derived C2 node, utilizing its historical resolution to Russian-hosted IP space (194.61.24.231) to maintain persistent Stealthworker botnet synchronization.",
        "By operating through WhoisGuard-protected infrastructure and exploiting XOR 0x20 obfuscation, the adversary effectively suppresses telemetry into skim space, successfully bypassing DMARC and Microsoft-integrated trust-chain validation.",
        "The pivot from cd398983... to this domain confirms a multi-year campaign (2019\u20132023) utilizing Namecheap-registered infrastructure to orchestrate wide-scale T1110.001 brute-force operations while bypassing standard PKI expiration checks.",
        "LBresearcher: msudosos notes: The campaign's use of T1110.001 (Password Guessing) is specifically tuned to exhaust credentials across SSH, MySQL, and CMS backends, effectively recruiting server infrastructure into a global \"zombie\" network.",
        "LBresearcher: msudosos notes: The threat actor maintains operational longevity by rotating through WhoisGuard-protected nodes like prioritywirreles.com, which historically resolved to Russian-hosted IP space (194.61.24.231) to obfuscate its origin.",
        "LBresearcher: msudosos notes: By exploiting Root Certificate Validation Failures, the StealthWorker (GoBrut) agent ensures that its 32-bit ELF binaries bypass the automated reputation checks enforced by major cloud providers.",
        "Monitor DGA Shifts: Track new domains registered through NAMECHEAP INC using the current WhoisGuard patterns to identify the next cluster before it goes active. Analyze Telfhash Clusters: Use the Telfhash (t1f303a0...) to pivot and find if the adversary has updated to 64-bit ELF or ARM architectures. Harden DMARC: Ensure your environment moves from \"p=none\" to \"p=reject\" to mitigate the internal spoofing loops exploited by this botnet's telemetry suppression.",
        "Persistent C2 Orchestration: This ELF:Agent-VW variant serves as a critical GoBrut node, utilizing XOR 0x20 obfuscation and ICMP/HTTP beaconing to maintain a persistent link across 1,834 domains and 797 unique IPs",
        "Researcher msudosos: This activity appears to facilitate a preliminary reconnaissance phase, possibly utilizing system commands to query /proc/cpuinfo and /proc/version for architectural profiling purposes.",
        "Researcher msudosos suggests the VirusTotal (Tencent HABO) behavior report may indicate a potential execution path from volatile storage at /tmp/EB93A6/996E.elf.",
        "Msudosos Regional Notes: While historical pivots show Russian-hosted nodes, the current dual-origin telemetry\u2014dominated by 181 United States-based endpoints\u2014strongly suggests a domestic-aligned adversary leveraging global 'grey space' to obfuscate its operational core. This massive US-centric footprint (exceeding all other regions combined) reinforces the theory of a false-flag orchestration designed to divert attribution toward foreign infrastructure while abusing legitimate Western-hosted trust chains.",
        "WHOIS data anchors administrative and technical operations for prioritywirreles.com in Los Angeles, CA (90064) via Namecheap infrastructure. Following its 2020 expiration, the domain has transitioned into redemptionPeriod/pendingDelete status, signaling the formal decommissioning of this C2 asset."
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