Threat Database Trojans Trojan.Dropper.Agent.F

Trojan.Dropper.Agent.F

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Popularity Rank: 20,443
Threat Level: 80 % (High)
Infected Computers: 424
First Seen: July 24, 2009
Last Seen: July 14, 2026
OS(es) Affected: Windows

The detection of Trojan.Dropper.Agent.F indicates that your system has been compromised by a malicious threat. This type of malware is designed to secretly install and run other malicious programs on your computer, potentially leading to a range of problems, including data theft, system crashes, and unauthorized access to your personal information. It is essential to take immediate action to remove this threat and prevent further damage to your system.

What Is Trojan.Dropper.Agent.F?

Trojan.Dropper.Agent.F is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The "Dropper" part of the name suggests that this malware is designed to install and run other malicious programs on your system. The exact nature and purpose of Trojan.Dropper.Agent.F can vary, but its primary goal is to compromise your system's security and potentially steal sensitive information or disrupt your computer's normal functioning.

How Trojan.Dropper.Agent.F Operates

Trojan.Dropper.Agent.F operates by exploiting vulnerabilities in your system's security, often through social engineering tactics or by exploiting weaknesses in software or operating system vulnerabilities. Once installed, it can download and install additional malware, create backdoors for remote access, or steal sensitive information such as login credentials, financial data, or personal files. The malware may also attempt to evade detection by anti-virus software, making it challenging to remove without proper guidance.

Symptoms of Infection

Systems infected with Trojan.Dropper.Agent.F may exhibit a range of symptoms, including slow system performance, frequent crashes, or unusual network activity. You may also notice unfamiliar programs or icons on your desktop, or receive unexpected pop-ups or alerts. In some cases, the malware may not display any obvious symptoms, making it difficult to detect without the use of anti-virus software.

  • Unexplained changes to system settings or configuration
  • Appearance of unfamiliar programs or files
  • Increased network activity or unusual traffic patterns
  • System crashes or freezes
  • Slow system performance or responsiveness

How to Remove Trojan.Dropper.Agent.F

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for a clean scan.
  2. Use a reputable anti-virus tool, such as SpyHunter, to perform a full scan of your system and remove any detected malware.
  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 scan to ensure that the malware has been completely removed.

Conclusion

Removing Trojan.Dropper.Agent.F from your system requires careful attention to detail and a thorough approach to ensure that all components of the malware are eliminated. By following the steps outlined above and using reputable anti-virus software, you can help protect your system and prevent further damage. It is essential to remain vigilant and take proactive steps to prevent future infections, including keeping your operating system and software up to date, using strong passwords, and avoiding suspicious downloads or email attachments.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
Symantec MicroBillSys
Sophos Micro Bill Systems
Panda Generic Trojan
NOD32 probably unknown NewHeur_PE
McAfee-GW-Edition Trojan.Backdoor.Delf.bob
McAfee potentially unwanted program MicroBillSystems
K7AntiVirus Backdoor.Win32.Delf
Ikarus Trojan.Win32.Agent
Fortinet FakeBillPayment.A!tr
Comodo Backdoor.Win32.Delf.bob
ClamAV Trojan.Agent-14263
CAT-QuickHeal Backdoor.Delf.bob
BitDefender Trojan.Fakebillpayment.A
AVG BackDoor.Generic9.JPO
Avast Win32:Delf-GMS

SpyHunter Detects & Remove Trojan.Dropper.Agent.F

File System Details

Trojan.Dropper.Agent.F may create the following file(s):
# File Name MD5 Detections
1. smvalid.exe 1569ee7b217e58d5215289a85d8735e2 0

Analysis Report

General information

Family Name: Trojan.Dropper.Agent.F
Signature status: No Signature

Known Samples

MD5: 1e6a5c5d3f850c1b22fd7d61b01ede09
SHA1: 4c8ba508bf33219802fed48e1c54b4d62bdce03c
SHA256: BF6B9D973054129530B1DA87FAB5878B45D092AB824929471649C743B528215D
File Size: 2.62 MB, 2623832 bytes
MD5: adbbe0ee66496461a6de94f74af5aaa1
SHA1: 63e393f8b8b0a243f81fa9cc997ef78803373913
SHA256: A920E8C4550D5E87ECCF50E42386409B641D424244067BFCF483DEEC15D77723
File Size: 4.75 MB, 4753021 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 32-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
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  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

Windows PE Version Information

Name Value
Comments This installation was built with Inno Setup: http://www.innosetup.com
File Description Curso BEST de Digitação Setup

File Traits

  • BINinO
  • Inno
  • InnoSetup Installer
  • Installer Manifest
  • Installer Version
  • MZ (In Overlay)
  • No Version Info
  • Nullsoft Installer
  • x86

Block Information

Total Blocks: 189
Potentially Malicious Blocks: 11
Whitelisted Blocks: 178
Unknown Blocks: 0

Visual Map

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

Files Modified

File Attributes
\device\namedpipe\gmdasllogger Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zb2026163511840.bat Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zb202641256123.bat Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zbe2026163511840.bat Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zbe202641256123.bat Generic Write,Read Attributes
c:\users\user\appdata\local\temp\ze2026163511840.tmp Generic Write,Read Attributes
c:\users\user\appdata\local\temp\ze202641256123.tmp Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zx2026163511840.xml Generic Write,Read Attributes
c:\users\user\appdata\local\temp\zx202641256123.xml Generic Write,Read Attributes
c:\users\user\appdata\roaming\maintenance\apps\maintenance.exe Generic Write,Read Attributes
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c:\users\user\downloads\4c8ba508bf33219802fed48e1c54b4d62bdce03c_0002623832 Synchronize,Write Data

Registry Modifications

Key::Value Data API Name
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe 㢕뛭线ǜ RegNtPreCreateKey
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe 깴뜂线ǜ RegNtPreCreateKey
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HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 � ! xy* �/��Y�d�kP~� ��ރ�p��^�o���zeeAVs}kP~��1p��7 ���ﺃe e��� ��1 ��fe��g RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 k 8��81z��B�8 �6 �v y� z �Z xy �� �a ۀT�B������1�����5����ee +Bx�<��5 � �7 �!wz"M)"Wc#�#��$kF$��%"�%:�%�&� &�x'�(�(X�)�`*J*9*�^+�[+��,=�,�� RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 闭ȁ ਪˣ鈯ˣ遙̃豤̃偫~অˣ炑̃龡^濖̃賬̃攘ť"獖}偫~엦1਷ˣ邯̃뫯ʃdᵂċᵆċeꙥž֢ᐊ엦1 ¶fꙥžg֢ RegNtPreCreateKey

Windows API Usage

Category API
User Data Access
  • GetComputerName
  • GetUserName
  • GetUserObjectInformation
Process Manipulation Evasion
  • NtUnmapViewOfSection
  • ReadProcessMemory
Process Shell Execute
  • CreateProcess
  • ShellExecute
  • WriteConsole
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateMutant
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  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFreeVirtualMemory
  • 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!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!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation
Process Terminate
  • TerminateProcess

Shell Command Execution

open C:\Users\Cmrxamlh\AppData\Local\Temp\zbe2026163511840.bat
open C:\Users\Cmrxamlh\AppData\Local\Temp\zb2026163511840.bat
C:\WINDOWS\system32\schtasks.exe Schtasks.Exe /delete /tn "Maintenance" /f
WriteConsole: Access is denied
C:\WINDOWS\system32\schtasks.exe Schtasks.Exe /create /tn "Maintenance" /xml "C:\Users\Cmrxamlh\AppData\Local\Temp\zx2026163511840.xml"
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WriteConsole: Access is denied
C:\WINDOWS\system32\chcp.com chcp 1251
WriteConsole: Active code page
WriteConsole: 1 file(s
C:\WINDOWS\system32\timeout.exe timeout /t 3 /nobreak
WriteConsole: Waiting for 3
WriteConsole: seconds, press
WriteConsole: 0832
WriteConsole: 0831
open C:\Users\Woiwatux\AppData\Local\Temp\zbe202641256123.bat
open C:\Users\Woiwatux\AppData\Local\Temp\zb202641256123.bat