Threat Database Trojans Trojan.MSIL.Downloader.UAO

Trojan.MSIL.Downloader.UAO

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 1
First Seen: February 20, 2023
Last Seen: April 16, 2026
OS(es) Affected: Windows

The detection of Trojan.MSIL.Downloader.UAO on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malicious software designed to download additional malware onto infected computers, which can lead to a variety of problems, including data theft, system compromise, and disruption of service. Understanding the nature of this threat and how it operates is crucial for effective removal and prevention of future infections.

What Is Trojan.MSIL.Downloader.UAO?

Trojan.MSIL.Downloader.UAO is identified as a Trojan-type threat, which is a broad category of malware that disguises itself as legitimate software to gain unauthorized access to a computer system. The ".MSIL" part of the name suggests that the malware is written in Microsoft Intermediate Language, which is a platform-agnostic, object-oriented programming language used by the .NET Framework. This implies that the malware could potentially affect systems running on the Windows operating system. The term "Downloader" indicates its primary function: to download and install additional malicious components from the internet.

How Trojan.MSIL.Downloader.UAO Operates

Trojan.MSIL.Downloader.UAO, like other Trojans, typically operates by deceiving users into installing it on their systems. This can happen through various means, such as opening malicious email attachments, clicking on links to malicious websites, or downloading infected software. Once installed, the malware can download additional malware components, which can include keyloggers, ransomware, spyware, or other types of Trojans. These components can then be used for a range of malicious activities, including stealing sensitive information, encrypting files for ransom, or using the infected computer as part of a botnet for distributed denial-of-service (DDoS) attacks.

Symptoms of Infection

Symptoms of a Trojan.MSIL.Downloader.UAO infection can vary widely depending on the specific payload downloaded by the malware. Common symptoms include slow system performance, unexpected pop-ups, changes to browser settings, and suspicious network activity. In some cases, the infection may not exhibit noticeable symptoms, making it difficult for users to detect without the aid of security software. It's also possible for the malware to create backdoors, allowing remote access to the infected system, which can lead to further malicious activities without the user's knowledge.

How to Remove Trojan.MSIL.Downloader.UAO

  1. Enter Safe Mode with Networking to prevent the malware from loading and to give you a cleaner environment to work in.
  2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all components of the malware.
  3. Uninstall any recently installed programs that you do not recognize or that were installed around the time the malware was detected.
  4. Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings changes made by the malware.
  5. Reboot your system and perform another full scan with your anti-malware tool to ensure that all malware components have been removed.

Conclusion

Removing Trojan.MSIL.Downloader.UAO requires a systematic approach to ensure that all components of the malware are eliminated from the infected system. It's crucial to use reputable security software and follow best practices for system security, including keeping your operating system and software up to date, using strong, unique passwords, and being cautious when opening email attachments or downloading software from the internet. By understanding how this malware operates and taking proactive steps to secure your system, you can protect your personal data and prevent future infections.

Analysis Report

General information

Family Name: Trojan.MSIL.Downloader.UAO
Signature status: No Signature

Known Samples

MD5: 18193de0133be2b1198d88b7d7607dbf
SHA1: 9c6d590ed9c693f2c5dddcfaae57a1b4c98477e7
SHA256: 161565898F1EA1D6C7AC0B80A01B228457C1F8A255B2DBC90351886CE03944A7
File Size: 1.09 MB, 1092096 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have exports table
  • File doesn't have security information
  • File is .NET application
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
Comments افضل برنامج لمشاهدة القنوات المشفرة
Company Name yacinetvpc.xyz
File Description YacineTV_PC
File Version 1.0.0.0
Internal Name YacineTV_PC.exe
Legal Copyright Copyright © 2022
Original Filename YacineTV_PC.exe
Product Name YacineTV_PC
Product Version 1.0.0.0

File Traits

  • .NET
  • HighEntropy
  • x86

Block Information

Total Blocks: 171
Potentially Malicious Blocks: 4
Whitelisted Blocks: 99
Unknown Blocks: 68

Visual Map

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x 0 0 x 0 ? 0 0 0 ? 0 0 0 ? 0 ? 0 ? ? ? 0 0 ? ? 0 ? ? 0 0 0 0 0 ? 0 0 0 ? ? 0 0 0 0 0 ? ? 0 ? ? ? ? x 0 0 0 ? ? ? ? ? ? ? ? ? x ? ? 0 0 0 0 0 0 ? 0 0 0 0 0 0 0 ? ? ? ? ? 0 ? ? 0 ? ? ? 0 ? ? 0 0 ? ? ? ? ? ? 0 ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 ? ? ?
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Windows API Usage

Category API
User Data Access
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Encryption Used
  • BCryptOpenAlgorithmProvider

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