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Malicious
Classifications

Spyware

Threat Names

Mal/Generic-S AgentTesla.v4 AgentTesla

Dynamic Analysis Report

Created on 2024-02-12T12:53:37+00:00

Ynstr.exe

Windows Exe (x86-32)
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Remarks (2/2)

(0x0200000E): The overall sleep time of all monitored processes was truncated from "4 minutes, 59 seconds" to "10 seconds" to reveal dormant functionality.

(0x02000004): The operating system was rebooted during the analysis because the sample installed a startup script, task or application for persistence.

Filters:
File Name Category Type Verdict Actions
C:\Users\RDhJ0CNFevzX\Desktop\Ynstr.exe Sample File Binary
Malicious
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Also Known As C:\Users\RDhJ0CNFevzX\AppData\Roaming\Mtwbsyxsy.exe (Accessed File, Dropped File)
C:\Users\RDhJ0CNFevzX\AppData\Roaming\sBRfm\sBRfm.exe (Accessed File)
MIME Type application/vnd.microsoft.portable-executable
File Size 718.00 KB
MD5 43a00ef10637139c060f1139df3b9cc1 Copy to Clipboard
SHA1 f717df8434925d25e03512c91385bc528576339e Copy to Clipboard
SHA256 f2a3d321b3fbb2d3be23e5416a82b92d9aa73c3573ef0630d0570483ced8a731 Copy to Clipboard
SSDeep 12288:RCcj8EhT1GrAjbadQSIVCXfUWQBZoeAfeDlV25x3nGxYcBa8k:Icj8EzCdQSIkXsWQE4lV259Gx Copy to Clipboard
ImpHash f34d5f2d4577ed6d9ceec516c1f5a744 Copy to Clipboard
File Reputation Information
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Verdict
Malicious
Names Mal/Generic-S
PE Information
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Image Base 0x00400000
Entry Point 0x004B4C4E
Size Of Code 0x000B2E00
Size Of Initialized Data 0x00000800
File Type IMAGE_FILE_EXECUTABLE_IMAGE
Subsystem IMAGE_SUBSYSTEM_WINDOWS_GUI
Machine Type IMAGE_FILE_MACHINE_I386
Compile Timestamp 2024-02-12 11:23 (UTC+1)
Version Information (11)
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Comments -
CompanyName -
FileDescription -
FileVersion 1.0.0.0
InternalName Ynstr.exe
LegalCopyright -
LegalTrademarks -
OriginalFilename Ynstr.exe
ProductName -
ProductVersion 1.0.0.0
Assembly Version 1.0.0.0
Sections (3)
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Name Virtual Address Virtual Size Raw Data Size Raw Data Offset Flags Entropy
.text 0x00402000 0x000B2C64 0x000B2E00 0x00000200 IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ 7.64
.rsrc 0x004B6000 0x00000556 0x00000600 0x000B3000 IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ 3.91
.reloc 0x004B8000 0x0000000C 0x00000200 0x000B3600 IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ 0.1
Imports (1)
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mscoree.dll (1)
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API Name Ordinal IAT Address Thunk RVA Thunk Offset Hint
_CorExeMain - 0x004B4C5C 0x000B4C28 0x000B2E28 0x00000000
Memory Dumps (47)
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Name Process ID Start VA End VA Dump Reason PE Rebuild Bitness Entry Point YARA Actions
ynstr.exe 1 0x00B80000 0x00C39FFF Relevant Image False 32-bit - False
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buffer 1 0x04750000 0x04801FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 1 0x04840000 0x04840FFF First Execution False 32-bit 0x04840000 False
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clrjit.dll 1 0x6DCE0000 0x6DD5FFFF First Execution False 32-bit 0x6DD41D21 False
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buffer 1 0x04890000 0x048CDFFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 1 0x04B30000 0x04B75FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 1 0x04890000 0x048CDFFF Reflectively Loaded .NET Assembly False 32-bit - False
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ynstr.exe 1 0x00B80000 0x00C39FFF Final Dump False 32-bit - False
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buffer 2 0x00400000 0x00441FFF Content Changed False 32-bit - False
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ynstr.exe 2 0x00CC0000 0x00D79FFF Relevant Image False 32-bit - False
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ynstr.exe 1 0x00B80000 0x00C39FFF Process Termination False 32-bit - False
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buffer 2 0x04F9E000 0x04F9FFFF First Network Behavior False 32-bit - False
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buffer 2 0x04B9C000 0x04B9FFFF First Network Behavior False 32-bit - False
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buffer 2 0x00BCE000 0x00BCFFFF First Network Behavior False 32-bit - False
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buffer 2 0x00189000 0x0018FFFF First Network Behavior False 32-bit - False
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buffer 2 0x00400000 0x00441FFF First Network Behavior False 32-bit - False
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ynstr.exe 2 0x00CC0000 0x00D79FFF First Network Behavior False 32-bit - False
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mtwbsyxsy.exe 6 0x00DE0000 0x00E99FFF Relevant Image False 32-bit - False
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sbrfm.exe 7 0x00250000 0x00309FFF Relevant Image False 32-bit - False
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buffer 6 0x049E0000 0x04A91FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 7 0x04780000 0x04831FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 7 0x04870000 0x04870FFF First Execution False 32-bit 0x04870000 False
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buffer 6 0x02680000 0x02680FFF First Execution False 32-bit 0x02680000 False
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clrjit.dll 7 0x72E70000 0x72EEFFFF First Execution False 32-bit 0x72ED6C02 False
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clrjit.dll 6 0x72E70000 0x72EEFFFF First Execution False 32-bit 0x72EC2A1E False
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buffer 6 0x04AE0000 0x04B1DFFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 6 0x04DD0000 0x04E15FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 7 0x048C0000 0x048FDFFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 7 0x04B60000 0x04BA5FFF Reflectively Loaded .NET Assembly False 32-bit - False
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buffer 8 0x00400000 0x00441FFF Content Changed False 32-bit - False
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mtwbsyxsy.exe 8 0x00790000 0x00849FFF Relevant Image False 32-bit - False
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buffer 9 0x00400000 0x00441FFF Content Changed False 32-bit - False
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sbrfm.exe 9 0x00FC0000 0x01079FFF Relevant Image False 32-bit - False
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mtwbsyxsy.exe 6 0x00DE0000 0x00E99FFF Process Termination False 32-bit - False
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sbrfm.exe 7 0x00250000 0x00309FFF Process Termination False 32-bit - False
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buffer 9 0x04EFD000 0x04EFFFFF First Network Behavior False 32-bit - False
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buffer 9 0x00E2C000 0x00E2FFFF First Network Behavior False 32-bit - False
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buffer 9 0x00BEE000 0x00BEFFFF First Network Behavior False 32-bit - False
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buffer 9 0x00188000 0x0018FFFF First Network Behavior False 32-bit - False
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buffer 9 0x00400000 0x00441FFF First Network Behavior False 32-bit - False
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sbrfm.exe 9 0x00FC0000 0x01079FFF First Network Behavior False 32-bit - False
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buffer 8 0x04E4E000 0x04E4FFFF First Network Behavior False 32-bit - False
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buffer 8 0x0493C000 0x0493FFFF First Network Behavior False 32-bit - False
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buffer 8 0x043AE000 0x043AFFFF First Network Behavior False 32-bit - False
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buffer 8 0x00189000 0x0018FFFF First Network Behavior False 32-bit - False
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buffer 8 0x00400000 0x00441FFF First Network Behavior False 32-bit - False
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mtwbsyxsy.exe 8 0x00790000 0x00849FFF First Network Behavior False 32-bit - False
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1a95ef6e164b7b75a798264283d1207315732bb7b02cc56c4a6c95d51da6b8ca Downloaded File Text
Clean
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»
MIME Type text/plain
File Size 12 Bytes
MD5 fe9ff3066fe8164afd6e58254136c014 Copy to Clipboard
SHA1 c25dfd9956f9d91b3470c8b920a129207baf0144 Copy to Clipboard
SHA256 1a95ef6e164b7b75a798264283d1207315732bb7b02cc56c4a6c95d51da6b8ca Copy to Clipboard
SSDeep 3:Cec:o Copy to Clipboard
ImpHash -
VMRay - Analyzer - www.vmray.com
Legal Note - Privacy Policy
Function Logfile
Download-Icon
Exit-Icon

This feature requires an online-connection to the VMRay backend.

An offline version with limited functionality is also provided.
The offline version is supported only in Mozilla Firefoxwith deactivated setting \"security.fileuri.strict_origin_policy\". 


    

   

   

    Before
   

   

    

     

      
       This feature requires an online-connection to the VMRay backend.
      
      

      

      An offline version with limited functionality is also provided.
      

      The offline version is supported only in Mozilla Firefoxwith deactivated setting \"security.fileuri.strict_origin_policy\".
     

     

    

   

   

    After
   

   

    

     

      
       This feature requires an online-connection to the VMRay backend.
      
      

      

      An offline version with limited functionality is also provided.
      

      The offline version is supported only in Mozilla Firefoxwith deactivated setting \"security.fileuri.strict_origin_policy\".
     

     

    

   

   

    

     
      

       
       
       
       
      

     
     
     
    

   

  

  

   

    

     Exit-Icon
    

    

     

      WHOIS Domain Information
     

     

      

       
        Domain Name
       
       
       
      

      

       
        WHOIS Response
       
       
        

       		
      

     

    

   

  

  

   

    
    

     Screenshot
    

    

     Expand-Icon
    

    

     Exit-Icon
    

   

   

    

     icon_left
    

    

     icon_left
    

   

   

   

   

    image