Threat Database Trojans Trojan.MSIL.Agent.COA

Trojan.MSIL.Agent.COA

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 24
First Seen: December 14, 2022
Last Seen: November 20, 2025
OS(es) Affected: Windows

The detection of Trojan.MSIL.Agent.COA indicates that your system has been compromised by a malicious program. This type of threat is designed to infiltrate your computer and potentially cause harm to your data, privacy, and overall system security. It is essential to take immediate action to remove the threat and prevent further damage.

What Is Trojan.MSIL.Agent.COA?

Trojan.MSIL.Agent.COA is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The name "Trojan" refers to the fact that this type of malware often infiltrates systems by masquerading as a harmless or useful application. The ".MSIL" part of the name suggests that the malware is written in Microsoft Intermediate Language, which is a programming language used by the .NET framework. The ".Agent.COA" part of the name may indicate that the malware is designed to operate as a covert agent, potentially allowing unauthorized access to the infected system.

How Trojan.MSIL.Agent.COA Operates

Trojan.MSIL.Agent.COA, like other Trojans, operates by exploiting vulnerabilities in the system or by tricking users into installing it. Once installed, the malware can perform a variety of malicious activities, such as stealing sensitive information, installing additional malware, or providing unauthorized access to the system. The exact behavior of Trojan.MSIL.Agent.COA may vary, but its primary goal is to compromise the security and integrity of the infected system.

Symptoms of Infection

Systems infected with Trojan.MSIL.Agent.COA may exhibit a range of symptoms, including slow performance, frequent crashes, and unexpected behavior. Users may also notice suspicious activity, such as unfamiliar programs or processes running in the background, or unexpected changes to system settings. In some cases, the malware may attempt to communicate with its creators or other infected systems, which can lead to increased network activity and potential data breaches.

How to Remove Trojan.MSIL.Agent.COA

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for easier removal.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system and detect any malicious files or programs.
  3. Uninstall any suspicious programs or applications that may be related to the malware.
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
  5. Reboot your system and perform another full scan to ensure that the malware has been completely removed.

Conclusion

Removing Trojan.MSIL.Agent.COA requires careful attention to detail and a thorough understanding of the malware's behavior. By following the steps outlined above and using reputable anti-malware tools, you can help to ensure the complete removal of the threat and prevent future infections. It is also essential to maintain good security practices, such as keeping your operating system and software up to date, using strong passwords, and being cautious when installing new programs or clicking on links from unknown sources. By taking these precautions, you can help to protect your system and data from the risks associated with Trojan.MSIL.Agent.COA and other types of malware.

Analysis Report

General information

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

Known Samples

MD5: 345049f7e1d9b5162e419337657594dd
SHA1: 0dec62339a4cff0f23d9df36725e8f265d6a0fa7
SHA256: 2F36E05E081A04819FE75550165130F0C4151F0BAE59021953FE5C6FB77BDC43
File Size: 65.02 KB, 65024 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 relocations information
  • File doesn't have security information
  • File is .NET application
  • File is 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is not packed
Show More
  • 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 0.0.0.0
File Version 0.0.0.0
Internal Name Client.exe
Original Filename Client.exe
Product Version 0.0.0.0

File Traits

  • .NET
  • HighEntropy
  • ntdll
  • x64

Block Information

Total Blocks: 22
Potentially Malicious Blocks: 17
Whitelisted Blocks: 4
Unknown Blocks: 1

Visual Map

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

Similar Families

  • MSIL.Agent.COA

Files Modified

File Attributes
c:\users\user\appdata\local\0dec62339a4cff0f23d9df36725e8f265d6a0fa7_0000065024 Generic Write,Read Attributes
c:\users\user\appdata\local\0dec62339a4cff0f23d9df36725e8f265d6a0fa7_0000065024 Synchronize,Write Attributes

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtAssociateWaitCompletionPacket
  • ntdll.dll!NtCancelTimer2
  • ntdll.dll!NtCancelWaitCompletionPacket
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtCompareSigningLevels
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  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateIoCompletion
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreatePrivateNamespace
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtCreateTimer2
  • ntdll.dll!NtCreateWaitCompletionPacket
  • ntdll.dll!NtCreateWorkerFactory
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtGetCachedSigningLevel
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtNotifyChangeKey
  • 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!NtQueryDebugFilterState
  • 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!NtQueryWnfStateData
  • 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!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetTimer2
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtUnsubscribeWnfStateChange
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN
User Data Access
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Anti Debug
  • IsDebuggerPresent

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