Threat Database Trojans Trojan.Agent.PFNA

Trojan.Agent.PFNA

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 1
First Seen: July 12, 2025
Last Seen: July 15, 2025
OS(es) Affected: Windows

The detection of Trojan.Agent.PFNA on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security and integrity of your computer, and it's essential to understand its nature and how to remove it effectively.

What Is Trojan.Agent.PFNA?

Trojan.Agent.PFNA is a type of Trojan horse malware, which is a broad category of threats that disguise themselves as legitimate programs or files. The name "Trojan" comes from the ancient Trojan Horse story, where a seemingly harmless gift was used to infiltrate and attack a secure system. In the context of computer security, a Trojan horse operates similarly, appearing as a harmless or useful program but actually containing malicious code designed to harm or exploit the system it infects.

How Trojan.Agent.PFNA Operates

Malware like Trojan.Agent.PFNA typically operates by exploiting vulnerabilities in the system or by tricking users into installing it. Once installed, it can perform a variety of malicious activities, such as stealing sensitive information, installing additional malware, or providing unauthorized access to the infected computer. The exact operation can vary widely depending on the specific goals of the malware creators, but the common denominator is the intent to compromise the security and integrity of the infected system.

Symptoms of Infection

Identifying a Trojan infection can be challenging because these types of malware are designed to operate stealthily. However, there are several symptoms that might indicate the presence of Trojan.Agent.PFNA or similar malware on your system. These can include unusual system behavior, such as unexpected pop-ups, slow performance, or unfamiliar programs running in the background. Additionally, you might notice that your browser settings have changed, or you're being redirected to unwanted websites. It's also possible that your antivirus software detects and alerts you to suspicious activity.

How to Remove Trojan.Agent.PFNA

  1. Enter Safe Mode with Networking to prevent the malware from loading and to give you a cleaner environment to work in. This will limit the malware's ability to interfere with the removal process.
  2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. This can help identify and remove the malware, as well as any other threats that might be present on your system.
  3. Uninstall any suspicious programs that you don't recognize or that were installed around the time you suspect the infection occurred. Be cautious and only uninstall programs you are certain are not necessary for your system's operation.
  4. Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings changes made by the malware.
  5. Reboot your computer and perform another full scan with your anti-malware tool to ensure that the threat has been fully removed. This step is crucial to confirm that no remnants of the malware remain on your system.

Conclusion

Removing Trojan.Agent.PFNA requires careful and thorough action to ensure that your system is completely cleaned and protected. It's also important to take preventive measures to avoid future infections, such as keeping your operating system and software up to date, using strong antivirus protection, and being cautious when downloading and installing software or clicking on links from unknown sources. By understanding the nature of Trojan horse malware and taking the right steps, you can protect your computer and your personal data from these and other types of cyber threats.

Analysis Report

General information

Family Name: Trojan.Agent.PFNA
Signature status: No Signature

Known Samples

MD5: b3cc725934e4d5c227078b4fb0fa7ec1
SHA1: 5d5a4db60c6e1cf972fa067e1aaee1e9cb59f371
SHA256: 80897350AB2BBBF0DCCF9FD8289E6C9DED2418B2905E20323113AE97EB2BC7A0
File Size: 1.81 MB, 1809920 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have exports table
  • File doesn't have security information
  • File has TLS information
  • File is 64-bit executable
  • File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
  • File is either console or GUI application
  • File is Native application (NOT .NET 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)

File Traits

  • fptable
  • HighEntropy
  • No Version Info
  • x64

Block Information

Total Blocks: 1,352
Potentially Malicious Blocks: 25
Whitelisted Blocks: 1,278
Unknown Blocks: 49

Visual Map

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

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtWriteFile
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  • ntdll.dll!NtWriteVirtualMemory
  • win32u.dll!NtUserGetKeyboardLayout
  • win32u.dll!NtUserGetThreadState

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