Threat Database Trojans Trojan.MSIL.Krypt.GJLF

Trojan.MSIL.Krypt.GJLF

By CagedTech in Trojans

Analysis Report

General information

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

Known Samples

MD5: ece127fe174b0fa6908065963ac99dc4
SHA1: 5aef1e52c7b4d8ff14184fd3b960e478396a1e10
SHA256: 1CBBF874F4C7F8156C14C334E3A1CB5D77992E5B9DF27901DB019E560508788F
File Size: 423.42 KB, 423424 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 is .NET application
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • 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)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
File Version 1.0.0.0
Internal Name Aflrvpypvf.exe
Original Filename Aflrvpypvf.exe
Product Version 1.0.0.0

File Traits

  • .NET
  • GenKrypt
  • Reactor
  • RijndaelManaged
  • x86

Block Information

Total Blocks: 39
Potentially Malicious Blocks: 2
Whitelisted Blocks: 37
Unknown Blocks: 0

Visual Map

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

Similar Families

  • Agent.MOU
  • MSIL.Mardom.CDA
  • MSIL.Mardom.TJA
  • MSIL.Mardom.TJB
  • MSIL.Mardom.TK
Show More
  • MSIL.Ursu.TJG

Files Modified

File Attributes
\device\namedpipe\dav rpc service Generic Read,Write Data,Write Attributes,Write extended,Append data
\device\namedpipe\pshost.134271286654242433.3116.defaultappdomain.powershell Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288
\device\namedpipe\wkssvc Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\temp\__psscriptpolicytest_3w55fdon.tj0.ps1 Generic Write,Read Attributes
c:\users\user\appdata\local\temp\__psscriptpolicytest_nln3omro.ipc.psm1 Generic Write,Read Attributes

Registry Modifications

Key::Value Data API Name
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe 嵲ᢘ܆ǝ RegNtPreCreateKey

Windows API Usage

Category API
User Data Access
  • GetUserDefaultLocaleName
  • GetUserName
  • GetUserNameEx
  • GetUserObjectInformation
Anti Debug
  • CheckRemoteDebuggerPresent
  • IsDebuggerPresent
  • NtQuerySystemInformation
Encryption Used
  • BCryptOpenAlgorithmProvider
  • CryptAcquireContext
Other Suspicious
  • AdjustTokenPrivileges
Process Manipulation Evasion
  • NtUnmapViewOfSection
Syscall Use
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtDuplicateObject
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  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenSection
  • 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!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN

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