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TF-1933752 high

📛 Threat Title

Unknown Loader: Domain name that delivers a malware payload shirozaki.adv.br

Category: Unknown Loader Published: Source updated: First seen: Last updated: Source: ThreatFox IOCs

Description

Indicator that identifies a malware distribution server (payload delivery). IOC type: Domain name that delivers a malware payload. Attributed malware: Unknown Loader. Confidence: 75. First seen: 2026-09-25 16:07:21 UTC. Reporter: varysz. Tags: etherhiding, victim.

Indicators of Compromise (1)

Each indicator is enriched from the IOC database, threat-intel feed corroboration (Threat Hunt) and VirusTotal. Click one to expand.

domain shirozaki.adv.br VT 2 / 91 UrlVoid 3 / 36

IOC database

Type
domain
Value
shirozaki.adv.br
First seen
Last seen
Attached to this threat
Appears in
1 threat
Description
Ingested from IOC source: https://threatfox.abuse.ch/downloads/hostfile/

Open the full IOC page →

Threat Hunt — feed corroboration

Not present in any configured threat-intel feed.

Flagged by 2 of 91 VirusTotal vendors

VendorVerdictDetection
Gridinsoft suspicious suspicious
SOCRadar suspicious suspicious

Details From VirusTotal

Basic Properties
TLDadv.br
History
Last analysis2026-09-25 17:17 UTC
Last modified on VirusTotal2026-09-25 23:59 UTC
WHOIS record date2026-09-01 12:17 UTC

References (2)

  • Malpedia profile ThreatFox IOCs
  • ThreatFox IOC page ThreatFox IOCs

    Indicator that identifies a malware distribution server (payload delivery). IOC type: Domain name that delivers a malware payload. Attributed malware: Unknown Loader. Confidence: 75. First seen: 2026-09-25 16:07:21 UTC. Reporter: varysz. Tags: etherhiding, victim.

Remediations (10)

  • IOC Alert: unknown_loader Payload Delivery
    web:darkwebinformer.com

    A new domain -based indicator has been identified associated with payload delivery activity tied to the malware unknown_loader . This domain , advertised under the guise of a mobile advertising and monetization platform, poses a high-confidence threat to users and organizations.

  • Unknown Loader malware — IOCs & CVEs | isMalicious
    web:ismalicious.com

    4,553 indicators of compromise attributed to the Unknown Loader malware family — domains , IPs, URLs and file hashes, from abuse.ch feeds.

  • Common Malware Loaders - ReliaQuest
    web:reliaquest.com

    Learn about the role of malware loaders in cybercriminal campaigns, their distribution methods, and strategies for detection and mitigation .

  • ClickFix Campaigns Expand Malware Delivery With New Loaders and Fake ...
    web:thehackernews.com

    ClickFix attacks are delivering BabaDeda, Lorem Ipsum, and Potemkin loaders to deploy stealers, RATs, and ransomware-linked tooling.

  • URLhaus | Malware URL exchange
    web:urlhaus.abuse.ch

    URLhaus URLhaus is a platform from abuse.ch and Spamhaus dedicated to sharing malicious URLs that are being used for malware distribution. Report URLs and explore the database for valuable intelligence. Use the APIs, to seamlessly push and pull signals, and automate bulk queries. With this intelligence, gain insights into malware behavior, to help identify, track, and mitigate against malware ...

  • A Wretch Client: From ClickFix deception to information ... - Elastic
    web:www.elastic.co

    Elastic Security Labs detected a surge in ClickFix campaigns, using GHOSTPULSE to deploy Remote Access Trojans and data-stealing malware .

  • Fake Google and Cloudflare verification pages spread multiple malware ...
    web:www.malwarebytes.com

    We uncovered ClickFix attacks using fake Google and Cloudflare pages to deliver everything from infostealers to a newly discovered malware loader .

  • Think before you Click(Fix): Analyzing the ClickFix social engineering ...
    web:www.microsoft.com

    The ClickFix social engineering technique has been growing in popularity, with campaigns targeting thousands of enterprise and end-user devices daily. This technique exploits users' tendency to resolve technical issues by tricking them into running malicious commands. These commands, in turn, deliver payloads that ultimately lead to information theft and exfiltration.

  • ACR Stealer: Two observed intrusion chains amid increased threat ...
    web:www.microsoft.com

    From late April 2026 to mid-June 2026, Microsoft Defender Experts observed increased ACR Stealer activity across customer environments. These campaigns are successfully using ClickFix lures to steal browser credentials, authentication tokens, and sensitive documents from enterprise environments.

  • ClickFix HijackLoader Phishing Campaign Analysis | Seqrite
    web:www.seqrite.com

    Unlike simple payloads , loaders are engineered with a dedicated purpose: to circumvent security defenses, establish persistence, and create a favorable environment for the hidden execution of the final-stage malware . This makes them a more significant and relevant threat that demands focused analysis.

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