Threat Database Trojans Trojan.MSIL.Downloader.Small.AG

Trojan.MSIL.Downloader.Small.AG

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 6
First Seen: July 31, 2021
Last Seen: October 24, 2025
OS(es) Affected: Windows

The detection of Trojan.MSIL.Downloader.Small.AG on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malicious software, but without specific details, it's crucial to understand the general nature of such threats and how to address them effectively.

What Is Trojan.MSIL.Downloader.Small.AG?

Trojan.MSIL.Downloader.Small.AG refers to a type of malware that is categorized as a Trojan. Trojans are malicious programs that disguise themselves as legitimate software but are designed to allow unauthorized access to a computer system. The term "MSIL" stands for Microsoft Intermediate Language, which is a part of the .NET framework, suggesting that this Trojan might be written in a .NET language. The "Downloader" part of the name indicates that this malware is capable of downloading additional malicious components from the internet, potentially leading to further infections. The "Small.AG" could refer to the specific variant or generation of the malware, but without more context, its significance is speculative.

How Trojan.MSIL.Downloader.Small.AG Operates

Trojan.MSIL.Downloader.Small.AG, like other Trojans, operates by deceiving users into installing it on their systems. This could happen through various means such as opening malicious email attachments, downloading software from untrusted sources, or visiting compromised websites. Once installed, it can create a backdoor on the infected computer, allowing remote access to the attackers. This access can be used for a variety of malicious activities, including stealing sensitive information, installing additional malware, or using the computer as part of a botnet for distributed denial-of-service (DDoS) attacks or spamming.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Downloader.Small.AG infection can vary widely depending on the specific actions of the malware. Common signs include unusual system behavior, such as slow performance, frequent crashes, or unfamiliar programs appearing on the system. Users might also notice increased network activity, even when no programs are running, or find that their personal files have been encrypted and are being held for ransom. Sometimes, the malware may operate silently, making it difficult to detect without the use of antivirus software.

How to Remove Trojan.MSIL.Downloader.Small.AG

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for a clean environment to perform removal steps.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. Ensure the tool is updated with the latest definitions to increase the chances of detecting and removing the malware.
  3. Uninstall any suspicious 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, etc.) to their default settings to remove any malicious extensions or settings changes made by the malware.
  5. After completing the above steps, reboot your computer and perform another full scan with your anti-malware tool to ensure that all components of the malware have been removed.

Conclusion

Removing Trojan.MSIL.Downloader.Small.AG requires a combination of technical knowledge and the right tools. It's essential to act quickly to prevent further damage to your system and potential data theft. Regularly updating your operating system, using strong antivirus software, and practicing safe computing habits (such as avoiding suspicious downloads and emails) can significantly reduce the risk of infection. If you're not comfortable with the removal process yourself, consider seeking help from a professional to ensure your system is thoroughly cleaned and protected against future threats.

Analysis Report

General information

Family Name: Trojan.MSIL.Downloader.Small.AG
Signature status: No Signature

Known Samples

MD5: da478e7f17353b01d9ffa53aab0f0528
SHA1: feda3f894c15858ec99b0730d805db8ed1361e8d
SHA256: 4F050EEA5800F10338894C847BDBFA5A93BD03115ED7A3C979422F0F0CA95739
File Size: 63.49 KB, 63488 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 console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
  • File is either console or GUI application
  • 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)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
File Description SharpCheckInfo
File Version 1.0.0.0
Internal Name SharpCheckInfo.exe
Legal Copyright Copyright © 2019
Original Filename SharpCheckInfo.exe
Product Name SharpCheckInfo
Product Version 1.0.0.0

File Traits

  • .NET
  • x86

Block Information

Total Blocks: 14
Potentially Malicious Blocks: 14
Whitelisted Blocks: 0
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Downloader.Small.AG

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreatePrivateNamespace
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
Show More
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFlushProcessWriteBuffers
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenDirectoryObject
  • ntdll.dll!NtOpenEvent
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcess
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryDefaultLocale
  • ntdll.dll!NtQueryDirectoryFileEx
  • ntdll.dll!NtQueryFullAttributesFile
  • ntdll.dll!NtQueryInformationFile
  • ntdll.dll!NtQueryInformationJobObject
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryLicenseValue
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQuerySecurityObject
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWriteFile
  • UNKNOWN
User Data Access
  • GetUserDefaultLocaleName
  • GetUserObjectInformation

Related Posts

Trending

Most Viewed

Loading...