Threat Database Trojans Trojan.Agent.POSF

Trojan.Agent.POSF

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 0
First Seen: August 25, 2025
OS(es) Affected: Windows

The detection of Trojan.Agent.POSF 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 take steps to remove it to prevent further damage.

What Is Trojan.Agent.POSF?

Trojan.Agent.POSF is a type of Trojan horse malware, which is a broad category of threats that disguise themselves as legitimate software to gain unauthorized access to a computer system. The name "Trojan" refers to the malicious program's ability to hide its true intentions, much like the legendary Trojan Horse of ancient Greek mythology. Trojan horses can be used to install additional malware, steal sensitive information, or provide unauthorized access to the infected system.

How Trojan.Agent.POSF Operates

Once installed, Trojan.Agent.POSF can operate in various ways, depending on its intended purpose. It may attempt to connect to a command and control server to receive instructions from its creators, download additional malware, or steal sensitive information such as login credentials, credit card numbers, or personal data. It can also modify system settings, disable security software, or create backdoors for future exploitation. The exact operation of Trojan.Agent.POSF can vary, but its primary goal is to compromise the security and integrity of the infected system.

Symptoms of Infection

The symptoms of a Trojan.Agent.POSF infection can be subtle, but they may include unusual system behavior, such as slow performance, frequent crashes, or pop-up ads. You may also notice that your system is connecting to unfamiliar websites or that your antivirus software is disabled. In some cases, you may not notice any symptoms at all, which is why regular system scans and monitoring are essential for detecting and removing malware.

  • Unexplained changes to system settings or files
  • Unusual network activity or connections to unknown servers
  • Slow system performance or frequent crashes
  • Pop-up ads or unfamiliar browser toolbars
  • Disabled security software or firewall

How to Remove Trojan.Agent.POSF

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for a clean removal process.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full system scan and remove any detected threats.
  3. Uninstall any suspicious programs or software that may be related to the infection.
  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.Agent.POSF requires a combination of technical knowledge and caution. It's essential to follow the steps outlined above and to use reputable security software to ensure that the malware is completely removed. Additionally, it's crucial to practice good security habits, such as regularly updating your operating system and software, using strong passwords, and avoiding suspicious downloads or email attachments. By taking these steps, you can help protect your system from future malware infections and maintain the security and integrity of your computer. Remember to stay vigilant and monitor your system regularly for any signs of malware activity.

Analysis Report

General information

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

Known Samples

MD5: a870b8b12a187a82744a0059a544610b
SHA1: 75689dfd32ea6b8d889f710270f8bdca7feec48d
SHA256: 831DBF9454CCD353D8632B068A5C1AE4A34299E663AE12934717AB3970C11681
File Size: 271.87 KB, 271872 bytes
MD5: 619e07c8d0c2cb07d6de07f83d393876
SHA1: 03a0f1034f024c610b70e5b0a922e52e8105063f
SHA256: CB17A404DFE1CDB1051240C4996EE9984FCAA50DDA578651BDC54ABCE8D0E590
File Size: 252.42 KB, 252416 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 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET 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)

File Traits

  • fptable
  • HighEntropy
  • No Version Info
  • x64

Block Information

Total Blocks: 1,000
Potentially Malicious Blocks: 113
Whitelisted Blocks: 665
Unknown Blocks: 222

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 1 ? ? 1 ? ? ? 0 0 0 ? 0 0 0 1 0 0 0 0 0 0 0 0 0 0 ? ? ? x x 0 0 0 0 0 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 x ? ? ? x x x x x x x x ? x x x x x x x x x x x x x x x x x x x x x x x x x 0 x x 0 x 0 0 x x 0 ? ? x x x x x 0 ? ? ? x ? 0 x x x x ? x x x x x x x x x x 0 0 ? ? x ? x x ? x 0 ? ? 0 ? ? 0 0 x 0 x 0 ? ? ? ? ? 0 ? ? x 0 0 ? 0 x 0 x ? ? ? 0 0 x ? 0 0 0 x x ? x ? ? x x 0 x 0 x x 0 0 x ? 0 ? x 0 ? x ? x x x x x ? ? 0 0 x x 0 0 x x x ? ? ? x x 0 0 ? 0 ? 0 ? x x x x ? x x 0 0 0 x 0 0 x x x 0 x x x x 0 1 x x x 0 x 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 2 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 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 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 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 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 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 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 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 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 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 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 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 0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtProtectVirtualMemory
Show More
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQuerySecurityObject
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWriteFile
  • ntdll.dll!NtYieldExecution
  • UNKNOWN