Windows Analysis Report
Newtonsoft.dll

Overview

General Information

Sample name: Newtonsoft.dll
(renamed file extension from Json to dll)
Original sample name: Newtonsoft.Json
Analysis ID: 1431806
MD5: 195ffb7167db3219b217c4fd439eedd6
SHA1: 1e76e6099570ede620b76ed47cf8d03a936d49f8
SHA256: e1e27af7b07eeedf5ce71a9255f0422816a6fc5849a483c6714e1b472044fa9d
Infos:

Detection

Score: 22
Range: 0 - 100
Whitelisted: false
Confidence: 60%

Signatures

.NET source code contains potential unpacker
Binary contains a suspicious time stamp
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

Source: Newtonsoft.dll Static PE information: certificate valid
Source: Newtonsoft.dll Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Source: Binary string: /_/Src/Newtonsoft.Json/obj/Release/net45/Newtonsoft.Json.pdbSHA256 source: Newtonsoft.dll
Source: Binary string: /_/Src/Newtonsoft.Json/obj/Release/net45/Newtonsoft.Json.pdb source: Newtonsoft.dll
Source: Newtonsoft.dll String found in binary or memory: http://cacerts.digicert.com/DigiCertAssuredIDRootCA.crt0E
Source: Newtonsoft.dll String found in binary or memory: http://cacerts.digicert.com/DigiCertCSRSA4096RootG5.crt0E
Source: Newtonsoft.dll String found in binary or memory: http://cacerts.digicert.com/DigiCertTrustedG4RSA4096SHA256TimeStampingCA.crt0
Source: Newtonsoft.dll String found in binary or memory: http://cacerts.digicert.com/DigiCertTrustedRootG4.crt0C
Source: Newtonsoft.dll String found in binary or memory: http://cacerts.digicert.com/NETFoundationProjectsCodeSigningCA2.crt0
Source: Newtonsoft.dll String found in binary or memory: http://crl3.digicert.com/DigiCertAssuredIDRootCA.crl0
Source: Newtonsoft.dll String found in binary or memory: http://crl3.digicert.com/DigiCertCSRSA4096RootG5.crl0
Source: Newtonsoft.dll String found in binary or memory: http://crl3.digicert.com/DigiCertTrustedG4RSA4096SHA256TimeStampingCA.crl0
Source: Newtonsoft.dll String found in binary or memory: http://crl3.digicert.com/DigiCertTrustedRootG4.crl0
Source: Newtonsoft.dll String found in binary or memory: http://crl3.digicert.com/NETFoundationProjectsCodeSigningCA2.crl0F
Source: Newtonsoft.dll String found in binary or memory: http://crl4.digicert.com/NETFoundationProjectsCodeSigningCA2.crl0=
Source: Newtonsoft.dll String found in binary or memory: http://james.newtonking.com/projects/json
Source: Newtonsoft.dll String found in binary or memory: http://ocsp.digicert.com0A
Source: Newtonsoft.dll String found in binary or memory: http://ocsp.digicert.com0C
Source: Newtonsoft.dll String found in binary or memory: http://ocsp.digicert.com0O
Source: Newtonsoft.dll String found in binary or memory: http://ocsp.digicert.com0X
Source: Newtonsoft.dll String found in binary or memory: http://www.digicert.com/CPS0
Source: Newtonsoft.dll String found in binary or memory: https://github.com/JamesNK/Newtonsoft.Json
Source: Newtonsoft.dll String found in binary or memory: https://www.newtonsoft.com/json
Source: Newtonsoft.dll String found in binary or memory: https://www.newtonsoft.com/jsonschema
Source: Newtonsoft.dll String found in binary or memory: https://www.nuget.org/packages/Newtonsoft.Json.Bson
Sample file is different than original file name gathered from version info
Source: Newtonsoft.dll Binary or memory string: OriginalFilenameNewtonsoft.Json.dll2 vs Newtonsoft.dll
Source: classification engine Classification label: sus22.evad.winDLL@6/0@0/0
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6784:120:WilError_03
Source: Newtonsoft.dll Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: Newtonsoft.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\Newtonsoft.dll",#1
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\Newtonsoft.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\Newtonsoft.dll",#1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\Newtonsoft.dll",#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\Newtonsoft.dll",#1 Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\Newtonsoft.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: Newtonsoft.dll Static PE information: certificate valid
Source: Newtonsoft.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: Newtonsoft.dll Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Source: Newtonsoft.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: Binary string: /_/Src/Newtonsoft.Json/obj/Release/net45/Newtonsoft.Json.pdbSHA256 source: Newtonsoft.dll
Source: Binary string: /_/Src/Newtonsoft.Json/obj/Release/net45/Newtonsoft.Json.pdb source: Newtonsoft.dll

Data Obfuscation
barindex
.NET source code contains potential unpacker
Source: Newtonsoft.dll, DynamicUtils.cs .Net Code: CreateSharpArgumentInfoArray
Source: Newtonsoft.dll, LateBoundReflectionDelegateFactory.cs .Net Code: CreateDefaultConstructor
Binary contains a suspicious time stamp
Source: Newtonsoft.dll Static PE information: 0xB73F2470 [Fri Jun 3 23:17:04 2067 UTC]
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
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\Newtonsoft.dll",#1 Jump to behavior
windows-stand
Hide Legend

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: 1431806 Sample: Newtonsoft.Json Startdate: 25/04/2024 Architecture: WINDOWS Score: 22 15 .NET source code contains potential unpacker 2->15 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