Threat Database Trojans Trojan.MSIL.Agent.ASI

Trojan.MSIL.Agent.ASI

By CagedTech in Trojans

Threat Scorecard

Popularity Rank: 23,041
Threat Level: 80 % (High)
Infected Computers: 76
First Seen: December 13, 2022
Last Seen: July 22, 2026
OS(es) Affected: Windows

The detection of Trojan.MSIL.Agent.ASI on your system indicates a potential security threat. This detection name suggests a type of malicious software, but without more specific information, it's essential to understand the general characteristics of such threats and how to address them. Malware of this type can pose significant risks to your computer's security and your personal data, so it's crucial to take immediate action to remove it.

What Is Trojan.MSIL.Agent.ASI?

Trojan.MSIL.Agent.ASI is identified as a Trojan-type threat. Trojans are malicious programs that can allow unauthorized access to your computer, steal your data, or disrupt system operations. They often masquerade as legitimate software, making them difficult to detect without proper security tools. Understanding that this detection points to a potentially severe security compromise is vital for taking the right steps towards mitigation.

How Trojan.MSIL.Agent.ASI Operates

Trojan-type malware, like Trojan.MSIL.Agent.ASI, typically operates by exploiting vulnerabilities in your system or applications to gain unauthorized access. Once inside, it can perform a variety of malicious activities, including data theft, installation of additional malware, or even allowing remote access to your computer. The specifics of how Trojan.MSIL.Agent.ASI operates can depend on its design and the intentions of its creators, but the general approach involves deception and exploitation of system weaknesses.

Symptoms of Infection

Symptoms of a Trojan infection can vary widely. You might notice that your computer is running more slowly than usual, or you might see unexpected pop-ups, changes in your homepage, or other unusual behaviors from your applications. Sometimes, infections can be asymptomatic, making them particularly dangerous as they can operate undetected for extended periods. Being vigilant about system performance and watching for any unusual activity is crucial for early detection.

How to Remove Trojan.MSIL.Agent.ASI

  1. Enter Safe Mode with Networking: This will help prevent the malware from loading and interfering with the removal process. Restart your computer and press the key to enter safe mode (this varies by operating system but is often F8 or Shift+F8).
  2. Conduct a Full Scan: Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. Ensure your antivirus and anti-malware software are up-to-date before scanning.
  3. Uninstall Suspicious Programs: Go through your installed programs and uninstall anything that looks suspicious or unfamiliar. Be cautious, as some malware may disguise itself as legitimate software.
  4. Reset Your Browsers: Malware can often affect your web browsers. Resetting Chrome, Firefox, Edge, or any other browser you use can help remove malicious extensions or settings. Each browser has its own method for doing this, usually found in the settings or preferences menu.
  5. Reboot and Re-scan: After taking the above steps, reboot your computer and perform another full scan with your anti-malware tool to ensure that the threat has been fully removed.

Conclusion

Removing Trojan.MSIL.Agent.ASI requires careful and methodical steps to ensure your system is fully cleaned and secured. It's also a good time to review your security practices, such as ensuring all software is up-to-date, using strong, unique passwords, and being cautious with emails and downloads. Preventing future infections involves ongoing vigilance and maintaining robust security measures. By understanding the nature of Trojan-type threats and taking proactive steps, you can significantly reduce the risk of your computer being compromised in the future.

Analysis Report

General information

Family Name: Trojan.MSIL.Agent.ASI
Signature status: No Signature

Known Samples

MD5: cb85a35adc279492f4c6675bed7c0f8d
SHA1: 8d1816d1bff0038b8474510b602d6820907a5dc4
File Size: 10.24 KB, 10240 bytes
MD5: 9d5d49e265686aecf4dadad4b84ac84e
SHA1: ce0adcb75a21eaf3d71953825dd9015015659257
SHA256: BFDE3A03CD68825526C8AE4AF11C684DB629EEB6ED3982DD6AE44955ADBE9BED
File Size: 11.26 KB, 11264 bytes
MD5: abde412d4786ee3d4938a7f1684d0099
SHA1: ed2a86fbaf57edc624f1e26424bec9490fbca47b
SHA256: FFDAFFAB5125CF040B9AACAE14F49B92F4EA9A2557BECE0D9B885B76BEC30CB1
File Size: 19.97 KB, 19968 bytes
MD5: a6149c36e001768528ed00bc1f05735a
SHA1: 856dce0740ccdda064118913ece9abf4d285f584
SHA256: 01A19E921C5185F09153B681400BFA4D14443D30E4B5108451BDCD4DFE04B690
File Size: 87.55 KB, 87552 bytes
MD5: cd194832265532afc4f54e0444125d40
SHA1: da2682ca6613d55d2707d1e65618a36f2359973f
SHA256: A5C4CC4475F3D4A068EFB7714534C6E447360635D9C3F7A8AA536E0F0DEA3C63
File Size: 19.97 KB, 19968 bytes
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MD5: 08a2c8fba6605fe41c83a5fe566019d6
SHA1: 948fa71fccdab35144ca54459e19b5ecb736e6f8
SHA256: C999E2F96BDD67AC294B0532B33F894B8F384E8BC5B98938AEB32AC22DEDE1A8
File Size: 10.24 KB, 10240 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • 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)
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  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 0.0.0.0
File Version 0.0.0.0
Internal Name
  • App_Web_4al1dhct.dll
  • App_Web_vptojvir.dll
  • App_Web_zrfypmgv.dll
Original Filename
  • App_Web_4al1dhct.dll
  • App_Web_vptojvir.dll
  • App_Web_zrfypmgv.dll
Product Version 0.0.0.0

File Traits

  • .NET
  • dll
  • x86

Block Information

Total Blocks: 39
Potentially Malicious Blocks: 11
Whitelisted Blocks: 28
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Agent.JKA
  • MSIL.Webshell.BB
  • MSIL.Webshell.BH
  • MSIL.Webshell.BL
  • MSIL.Webshell.BW
Show More
  • MSIL.Webshell.DB
  • MSIL.Webshell.IF

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtFreeVirtualMemory
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  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenProcessTokenEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSemaphore
  • ntdll.dll!NtOpenThreadTokenEx
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryDebugFilterState
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseSemaphore
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • ntdll.dll!NtWriteVirtualMemory
  • UNKNOWN
  • win32u.dll!NtGdiBitBlt
  • win32u.dll!NtGdiCreateBitmap
  • win32u.dll!NtGdiCreateCompatibleDC
  • win32u.dll!NtGdiCreateDIBitmapInternal
  • win32u.dll!NtGdiCreateSolidBrush
  • win32u.dll!NtGdiDeleteObjectApp
  • win32u.dll!NtGdiExtGetObjectW
  • win32u.dll!NtGdiGetDCforBitmap
  • win32u.dll!NtGdiGetDCObject
  • win32u.dll!NtGdiGetDeviceCaps
  • win32u.dll!NtGdiRestoreDC
  • win32u.dll!NtGdiSaveDC
  • win32u.dll!NtGdiSelectBitmap
  • win32u.dll!NtGdiSetDIBitsToDeviceInternal
  • win32u.dll!NtUserBuildHwndList
  • win32u.dll!NtUserCallTwoParam
  • win32u.dll!NtUserCreateEmptyCursorObject
  • win32u.dll!NtUserCreateWindowEx
  • win32u.dll!NtUserDestroyWindow
  • win32u.dll!NtUserFindExistingCursorIcon
  • win32u.dll!NtUserGetAncestor
  • win32u.dll!NtUserGetClassInfoEx
  • win32u.dll!NtUserGetClassName
  • win32u.dll!NtUserGetDC
  • win32u.dll!NtUserGetGUIThreadInfo
  • win32u.dll!NtUserGetIconInfo
  • win32u.dll!NtUserGetIconSize
  • win32u.dll!NtUserGetImeInfoEx
  • win32u.dll!NtUserGetKeyboardLayout
  • win32u.dll!NtUserGetObjectInformation
  • win32u.dll!NtUserGetProcessWindowStation
  • win32u.dll!NtUserGetProp
  • win32u.dll!NtUserGetThreadDesktop
  • win32u.dll!NtUserGetThreadState
  • win32u.dll!NtUserGetWindowCompositionAttribute
  • win32u.dll!NtUserIsNonClientDpiScalingEnabled
  • win32u.dll!NtUserIsTopLevelWindow
  • win32u.dll!NtUserMessageCall
  • win32u.dll!NtUserRegisterClassExWOW
  • win32u.dll!NtUserRegisterWindowMessage
  • win32u.dll!NtUserReleaseDC
  • win32u.dll!NtUserRemoveProp
  • win32u.dll!NtUserSelectPalette
  • win32u.dll!NtUserSetCursorIconData
  • win32u.dll!NtUserSetWindowFNID
  • win32u.dll!NtUserSetWindowLongPtr
  • win32u.dll!NtUserSetWindowPos
  • win32u.dll!NtUserUpdateInputContext