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THE HUNTER’S LEDGER
rat
XWorm
A commodity .NET RAT sold as malware-as-a-service, among the most frequently recovered families in open directories. Named by 4 reports, 8 detection rules, 1 IOC feed and 1 tracked actor.

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Also written as: Xworm, XwormLoader. These are the spellings the rules, feeds and profiles use; the page collects all of them.

Reports

Detection rules

YARA rules whose family metadata names this family, by detection page.

Detection rules Apr 2026 · 2 rules · family = XWorm
Shadow RAT & XWorm Open Directory Campaign
RAT_XWorm_30_50_Config, RAT_XWorm_Rijndael256ECB_Crypto
Detection rules Mar 2026 · 2 rules · family = XWorm
ZeroTrace Multi-Family MaaS Operation (74.0.42.25)
RAT_XWorm_V56_Stub, TOOLKIT_XWorm_V56_Builder
Detection rules Mar 2026 · 1 rule · family = XwormLoader
ZeroTrace Multi-Family MaaS Operation (74.0.42.25)
MALW_XwormLoader_ReflectivePE
Detection rules Dec 2025 · 2 rules · family = NjRAT/XWorm
Dual-RAT Analysis: Pulsar RAT vs. NjRAT/XWorm
NjRAT_XWorm_Triple_Persistence, NjRAT_XWorm_Core_Detection
Detection rules Oct 2025 · 1 rule · family = QuasarRAT/Xworm
Quasar + XWorm + PowerShell
PS_Defender_Exclusion_Quasar_Xworm

IOC feeds

IOC feed Dec 2025 · family = NjRAT/XWorm (Bladabindi variant)
Dual-RAT Analysis: Pulsar RAT vs. NjRAT/XWorm

Tracked actors

Designations whose profile lists this family as tooling.

  • UTA-2026-003: Commodity MaaS consumer running Shadow RAT and XWorm from one Windows VPS

A family name here is the label the linked rule, feed or profile carries, normalised to one spelling by _data/families.yml. Where a report declines to name a family, this page does not either.