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CSBldStealer

Also known as:BLD short-form panelSystem lang / System TimeZone abbreviated variant

What is the CSBldStealer infostealer, and what data does it steal?

CSBldStealer (also known as BLD short-form panel and System lang / System TimeZone abbreviated variant) is a CyStack research label for information-stealer traces. CSBldStealer targets Host hardware and OS fingerprint (CPU, GPU, RAM, resolution, Windows version, UUID), Account identity (Windows username, computer name, admin flag) and Installed software inventory (per-program name plus version). As of 11/10/2026, CyStack's research assesses unknown attribution confidence.

Note: This data is provided for reference and cybersecurity research only.
CyStack recommends that users do not use this information for unlawful purposes

Description

Original English

CSBldStealer is a CyStack-coined identifier for a flat bare-key system.txt slice with a distinctive short-form field vocabulary: BLD: build tag, UUID: machine UUID, PC Name: computer name, User: username, AD: admin flag (+ / - sentinel), CPU / GPU / RAM / Resolution, System lang: UI-language (short-form lang), System TimeZone: bare-offset key, OS:, AV:, plus a trailing Programs: installed-software block.

The short-form abbreviations (BLD / AD / System lang) do not appear in any public reporting or community catalog. The panel could be a new .NET stealer, a rebrand of an existing family, or a private-panel build. Family attribution is provisional pending a published threat-intel mapping for this layout.

MITRE ATT&CK technique mapping

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CSBldStealer Infostealer Analysis: Targets & TTPs