Windows Analysis Report
file.dll

Overview

General Information

Sample name: file.dll
Analysis ID: 1563911
MD5: 224be01635cff2dca827fbdeaddb983c
SHA1: 11fa00c5e172c9cd1c81acaef52934f785f91374
SHA256: 7adfe849345edd76aa975b0647fed2ccaa5f4a6aaf7d55f488af939c0dbef153
Tags: NETdllMSILuser-jstrosch
Infos:

Detection

Score: 68
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
.NET source code references suspicious native API functions
AI detected suspicious sample
Machine Learning detection for sample
Creates a process in suspended mode (likely to inject code)
Program does not show much activity (idle)
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info

Classification

AV Detection
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Antivirus / Scanner detection for submitted sample
Source: file.dll Avira: detected
Multi AV Scanner detection for submitted file
Source: file.dll ReversingLabs: Detection: 63%
AI detected suspicious sample
Source: Submited Sample Integrated Neural Analysis Model: Matched 87.4% probability
Machine Learning detection for sample
Source: file.dll Joe Sandbox ML: detected
Source: file.dll Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Sample file is different than original file name gathered from version info
Source: file.dll Binary or memory string: OriginalFilenameRunPE.dll, vs file.dll
Source: classification engine Classification label: mal68.evad.winDLL@6/0@0/0
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:3536:120:WilError_03
Source: file.dll Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: file.dll Static file information: TRID: Win32 Dynamic Link Library (generic) Net Framework (1011504/3) 50.14%
Source: C:\Windows\System32\loaddll32.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\file.dll",#1
Source: file.dll ReversingLabs: Detection: 63%
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\file.dll"
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\file.dll",#1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\file.dll",#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\file.dll",#1 Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\file.dll",#1 Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: apphelp.dll Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Section loaded: apphelp.dll Jump to behavior
Source: file.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: file.dll Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Sample execution stops while process was sleeping (likely an evasion)
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\loaddll32.exe Thread delayed: delay time: 120000 Jump to behavior
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

HIPS / PFW / Operating System Protection Evasion
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.NET source code references suspicious native API functions
Source: file.dll, Plugin.cs Reference to suspicious API methods: ReadProcessMemory_API(processInformation.ProcessHandle, num3 + 8, ref buffer, 4, ref bytesRead)
Source: file.dll, Plugin.cs Reference to suspicious API methods: VirtualAllocEx_API(processInformation.ProcessHandle, num2, length, 12288, 64)
Source: file.dll, Plugin.cs Reference to suspicious API methods: WriteProcessMemory_API(processInformation.ProcessHandle, num4, data, bufferSize, ref bytesRead)
Creates a process in suspended mode (likely to inject code)
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\file.dll",#1 Jump to behavior
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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1563911 Sample: file.dll Startdate: 27/11/2024 Architecture: WINDOWS Score: 68 15 Antivirus / Scanner detection for submitted sample 2->15 17 Multi AV Scanner detection for submitted file 2->17 19 .NET source code references suspicious native API functions 2->19 21 2 other signatures 2->21 7 loaddll32.exe 1 2->7         started        process3 process4 9 cmd.exe 1 7->9         started        11 conhost.exe 7->11         started        process5 13 rundll32.exe 9->13         started       
⊘No contacted IP infos