Threat Database Trojans Trojan.Zegost.AH

Trojan.Zegost.AH

By CagedTech in Trojans

Threat Scorecard

Popularity Rank: 22,092
Threat Level: 80 % (High)
Infected Computers: 32
First Seen: May 9, 2021
Last Seen: September 4, 2026
OS(es) Affected: Windows

Analysis Report

General information

Family Name: Trojan.Zegost.AH
Signature status: No Signature

Known Samples

MD5: 8b2beb749a6e2afd687832c617cdb948
SHA1: 2c5d7e0a4598b5a0c3929153c135dfd8a36f9b71
SHA256: 26F68DB402B9FD4810B422ADC309C4C3F70D24B05CA69D7B902C7BDCE47E707C
File Size: 148.65 KB, 148647 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 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
  • 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
Company Name Microsoft Corporation
File Description Dynamic Interface Manager
File Version 10.0.17763.1
Internal Name MPRLOG.DLL
Legal Copyright ?Microsoft Corporation. All rights reserved.
Original Filename MPRLOG.DLL
Product Name Microsoft? Windows? Operating System
Product Version 10.0.17763.1

File Traits

  • dll
  • WriteProcessMemory
  • x86

Block Information

Total Blocks: 450
Potentially Malicious Blocks: 40
Whitelisted Blocks: 407
Unknown Blocks: 3

Visual Map

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

Similar Families

  • Stealer.FDG

Files Modified

File Attributes
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data

Registry Modifications

Key::Value Data API Name
HKLM\system\controlset001\services\aspnet_staters::connectgroup Default RegNtPreCreateKey
HKLM\system\controlset001\services\aspnet_staters::marktime 2026-09-04 17:29 RegNtPreCreateKey
HKLM\system\controlset001\services\aspnet_staters::work 1 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
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HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\5.0\cache\content::cacheprefix RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\5.0\cache\cookies::cacheprefix Cookie: RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\5.0\cache\history::cacheprefix Visited: RegNtPreCreateKey

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtClose
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtQueryAttributesFile
Show More
  • ntdll.dll!NtQueryDebugFilterState
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationFile
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWriteFile
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess
Anti Debug
  • NtQuerySystemInformation

Shell Command Execution

C:\WINDOWS\SysWOW64\rundll32.exe C:\WINDOWS\system32\rundll32.exe c:\users\user\downloads\2c5d7e0a4598b5a0c3929153c135dfd8a36f9b71_0000148647.,LiQMAxHB