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Reverse Engineering UnixStealer Infostealer — Decrypting the .NET Configuration

Reverse Engineering UnixStealer Infostealer — Decrypting the .NET Configuration

Source: YouTube · Malware Research Diary · published May 15, 2026 · 22:13

Malware Analysis
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Description

This video analyzes the "Unit Stealer," a .NET-based infostealer that uses Telegram bots for data exfiltration and services like GoFile.io for payload storage 0:05.

Key Takeaways:
• Unit Stealer is a prevalent .NET infostealer currently observed in the threat landscape 0:17.
• The malware utilizes the Telegram bot API to capture and exfiltrate stolen data from victims 0:42.
• It performs HTTP requests to retrieve the victim's public IP address for tracking purposes 0:54.
• Stolen data payloads are uploaded to GoFile.io to facilitate secure transfer to the attacker 1:08.

Understanding these exfiltration methods is crucial for detecting and mitigating the impact of modern infostealers.

Sources:

  • 0:05 Introduction to the Unit Stealer malware family
  • 0:17 Discussion on the popularity and prevalence of the malware
  • 0:42 Explanation of Telegram bot API usage for exfiltration
  • 0:54 Details on IP retrieval techniques
  • 1:08 Overview of GoFile.io integration for data storage

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Topic: Malware Analysis. Commonly maps to: Security Operations, Security Architecture and Engineering. Exact CISSP domains are assigned during generation.

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First 800 characters of the transcript

Hello everyone. Today we're going to take a look at the um analyzing a infostealer um a .NET um So yeah, let's um take a look real quick. So Unit Stealer um is a new popular um infostealer for some time now. It's um Everyday we come observe this. Um new type of sample every So So yeah. Um From the Take a look at this based on the VirusTotal. Um they performing variety different um capture using tele um Telegram bot um API to exfiltrate the data. So um Um performing some of the um HTTP request typical I can has IP to retrieve the public IP of the victim machine. Let me see what else we've got. Okay. Some memory using GoFileIO to upload um the um the payload of the data that they stole. So um So yeah. Um From here is nothing really special. Bypass so that's the name Unit My file explorer. So…