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Vol. 1 · Ed. 2026
CyberGlossary
Entry № 1390

XWorm

XWorm とは何ですか?

XWormA modular .NET remote-access trojan that emerged in 2022 and became one of the most distributed commodity RATs of 2024–2025, sold openly to low-skill operators and shipped via every common phishing and loader vector.


XWorm is a .NET-based remote-access trojan and stealer that first appeared in 2022 and has since become one of the most distributed commodity RATs, peaking through 2024–2025. It is sold on Telegram and forums to a low-skill operator base, which is reflected in its capability set: a builder GUI lets affiliates configure clipboard hijacking (crypto-wallet replacement), keystroke logging, screen capture, credential theft from major browsers and mail clients, hidden remote desktop (HVNC), webcam capture, file transfer, command shell, and a small plug-in loader for follow-on payloads. Some XWorm builds include worm-like spreading via USB drives and Discord-token theft. Distribution leverages phishing, SmokeLoader/PrivateLoader chains, malvertising, fake-update lures, and trojanized cracks. XWorm shares lineage and code with other commodity .NET families (NanoCore, Quasar, AsyncRAT) and is often used as the second-stage payload after loaders such as GuLoader, SmokeLoader, or DBatLoader. EDR detections target its typical C2 patterns (custom TCP protocol over TLS to operator-chosen ports) and its installation footprint in `%AppData%` with scheduled-task persistence.

  1. 01

    A phishing email with a 'shipment notice' lure delivers a GuLoader stage that decodes and launches XWorm, which then drops a clipboard-replacer plug-in.

  2. 02

    A 2024 campaign abuses CVE-2024-21412 (a Windows SmartScreen bypass) to drop XWorm without a SmartScreen warning.

よくある質問

XWorm とは何ですか?

A modular .NET remote-access trojan that emerged in 2022 and became one of the most distributed commodity RATs of 2024–2025, sold openly to low-skill operators and shipped via every common phishing and loader vector. サイバーセキュリティの マルウェア カテゴリに属します。

XWorm とはどういう意味ですか?

A modular .NET remote-access trojan that emerged in 2022 and became one of the most distributed commodity RATs of 2024–2025, sold openly to low-skill operators and shipped via every common phishing and loader vector.

XWorm はどのように機能しますか?

XWorm is a .NET-based remote-access trojan and stealer that first appeared in 2022 and has since become one of the most distributed commodity RATs, peaking through 2024–2025. It is sold on Telegram and forums to a low-skill operator base, which is reflected in its capability set: a builder GUI lets affiliates configure clipboard hijacking (crypto-wallet replacement), keystroke logging, screen capture, credential theft from major browsers and mail clients, hidden remote desktop (HVNC), webcam capture, file transfer, command shell, and a small plug-in loader for follow-on payloads. Some XWorm builds include worm-like spreading via USB drives and Discord-token theft. Distribution leverages phishing, SmokeLoader/PrivateLoader chains, malvertising, fake-update lures, and trojanized cracks. XWorm shares lineage and code with other commodity .NET families (NanoCore, Quasar, AsyncRAT) and is often used as the second-stage payload after loaders such as GuLoader, SmokeLoader, or DBatLoader. EDR detections target its typical C2 patterns (custom TCP protocol over TLS to operator-chosen ports) and its installation footprint in `%AppData%` with scheduled-task persistence.

XWorm からどのように防御しますか?

XWorm に対する防御は通常、上記の定義で述べたとおり、技術的統制と運用上の実践を組み合わせます。

XWorm の別名は何ですか?

一般的な別名: X-Worm, XWorm RAT。

関連用語