Threat Database Trojans Trojan.MSIL.Krypt.YAGR

Trojan.MSIL.Krypt.YAGR

By CagedTech in Trojans

Analysis Report

General information

Family Name: Trojan.MSIL.Krypt.YAGR
Signature status: No Signature

Known Samples

MD5: 1851dc48b25b34d01dce54dd74e1a7f0
SHA1: ba240969db2c865063a75f8186f2fc83860d52ae
SHA256: A21EA3BE11DAB8FF00566411BCA41EA6C635AC29ED71BCA8274DA560387701C9
File Size: 237.57 KB, 237568 bytes
MD5: 7c968b3c5b474607fe2ba1d998d2e68b
SHA1: 7def8f6562006e1e6ba46c4cf6a315fc1e5a5c84
SHA256: F7927714DDEFA45C1DCE30F54E1E9DD405BC4DF8ED2B6717F85B65C36F82E6DB
File Size: 238.08 KB, 238080 bytes
MD5: 52ed58414c9385c1419d25ce8e7c7470
SHA1: 10347954b28abd70b310394568a9f866c572ce17
SHA256: ACF2CCDC79812724088FABA738E2C5C7E90F1A123A4F5768049598294386CB6F
File Size: 767.49 KB, 767488 bytes
MD5: e11050ad2344966429e9a3e1f2de7f01
SHA1: bf19623702c28c8dcc8d2427af5fdb8f280b8123
SHA256: 1A439B3701F1C48F1F437238CAE021D0B8511A3D3EE91A24D50D91A413BE31CF
File Size: 260.10 KB, 260096 bytes
MD5: afc7e7ba33fba55805881d5dab525240
SHA1: 5bc8bab48f8e79c15f284f738b9eb016746ce8b6
SHA256: 771FF1A6C26C0D685708D42E1944F1E71769A353E67FD9C7A27452F1FFB6914A
File Size: 232.96 KB, 232960 bytes
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MD5: 889fb295e41ba717b142e0550177d28d
SHA1: 45ebf61a87178b34bcdfcd0b357dc8c056de4148
SHA256: 7EB8ABBE117E5387B888F951FD617F1C89A2F242064C0A4068EDB067FBFF8431
File Size: 3.09 MB, 3090343 bytes
MD5: af74393459340f474dcf388e99578731
SHA1: b5aff129e5d0ac5d50eefbee0d6927cd94b48739
SHA256: 763A17480F0161745104ECA863584F2B09594EF8A3AC8FD79F306D1A90ED38F1
File Size: 239.62 KB, 239616 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 security information
  • File has exports table
  • File has TLS information
  • File is .NET application
  • File is 32-bit executable
  • File is 64-bit executable
  • File is either console or GUI application
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  • 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 Icons

Windows PE Version Information

Name Value
Assembly Version
  • 10.0.19041.4957
  • 1.0.0.0
Company Name Microsoft Corporation
File Description Usermode Font Driver Host
File Version
  • 10.0.19041.4957
  • 1.0.0.0
Internal Name
  • DriverMonitor.exe
  • DriverRede.exe
  • fontdrvhost.exe
  • Inkdasnkksu.exe
  • svch0st.exe
  • svchost.exe
Legal Copyright © Microsoft Corporation. All rights reserved.
Original Filename
  • DriverMonitor.exe
  • DriverRede.exe
  • fontdrvhost.exe
  • Inkdasnkksu.exe
  • svch0st.exe
  • svchost.exe
Product Name Microsoft® Windows® Operating System
Product Version
  • 10.0.19041.4957
  • 1.0.0.0

File Traits

  • .NET
  • HighEntropy
  • NewLateBinding
  • ntdll
  • RijndaelManaged
  • x86

Block Information

Total Blocks: 731
Potentially Malicious Blocks: 162
Whitelisted Blocks: 565
Unknown Blocks: 4

Visual Map

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

Similar Families

  • MSIL.Agent.GDSE
  • MSIL.Agent.KS
  • MSIL.Agent.XO
  • MSIL.AgentTesla.AH
  • MSIL.Krypt.YAGO
Show More
  • MSIL.Krypt.YAGR
  • MSIL.Krypt.YAGT
  • MSIL.Krypt.YAGV
  • Tedy.L

Registry Modifications

Key::Value Data API Name
HKLM\software\microsoft\tracing\rasapi32::enablefiletracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::enableautofiletracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::enableconsoletracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::filetracingmask ￿ RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::consoletracingmask ￿ RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::maxfilesize  RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasapi32::filedirectory %windir%\tracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::enablefiletracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::enableautofiletracing RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::enableconsoletracing RegNtPreCreateKey
Show More
HKLM\software\microsoft\tracing\rasmancs::filetracingmask ￿ RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::consoletracingmask ￿ RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::maxfilesize  RegNtPreCreateKey
HKLM\software\microsoft\tracing\rasmancs::filedirectory %windir%\tracing RegNtPreCreateKey

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcCreatePortSection
  • ntdll.dll!NtAlpcCreateSectionView
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtAssociateWaitCompletionPacket
Show More
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateIoCompletion
  • ntdll.dll!NtCreateKey
  • 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!NtDelayExecution
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtGetCompleteWnfStateSubscription
  • 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!NtOpenProcessTokenEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSymbolicLinkObject
  • ntdll.dll!NtOpenThread
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtOpenThreadTokenEx
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • 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!NtQuerySymbolicLinkObject
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtQueueApcThread
  • ntdll.dll!NtQueueApcThreadEx2
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReadVirtualMemory
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • 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!NtSetValueKey
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtUnsubscribeWnfStateChange
  • ntdll.dll!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile

2 additional items are not displayed above.

User Data Access
  • GetComputerName
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Other Suspicious
  • AdjustTokenPrivileges
Anti Debug
  • CheckRemoteDebuggerPresent
  • IsDebuggerPresent
  • NtQuerySystemInformation
Process Manipulation Evasion
  • ReadProcessMemory
Network Winsock2
  • WSAConnect
  • WSASocket
  • WSAStartup
Network Winsock
  • closesocket
  • recv
  • send
  • setsockopt
Network Winhttp
  • WinHttpOpen
Network Info Queried
  • GetAdaptersAddresses

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