Windows Analysis Report
FastMath.dll.dll

Overview

General Information

Sample name: FastMath.dll.dll
(renamed file extension from exe to dll)
Original sample name: FastMath.dll.exe
Analysis ID: 1546674
MD5: 2acea922e251c62106719021bebd1815
SHA1: 6cb02b2483212fc068b57271fcf7e302b2b8d135
SHA256: 8c6c3f9b3fd8497322cd9e798790aa3485a44f9c5418bb4aa97b630a3fb8cead
Tags: exeuser-likeastar20
Infos:

Detection

Score: 22
Range: 0 - 100
Whitelisted: false
Confidence: 80%

Signatures

AI detected suspicious sample
Creates a process in suspended mode (likely to inject code)
May sleep (evasive loops) to hinder dynamic analysis
Program does not show much activity (idle)
Sample execution stops while process was sleeping (likely an evasion)

Classification

AV Detection
barindex
AI detected suspicious sample
Source: Submited Sample Integrated Neural Analysis Model: Matched 99.6% probability
Source: FastMath.dll.dll Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT
Source: classification engine Classification label: sus22.winDLL@6/0@0/0
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:1776:120:WilError_03
Source: FastMath.dll.dll Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: C:\Windows\System32\loaddll64.exe Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\System32\cmd.exe Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1
Source: unknown Process created: C:\Windows\System32\loaddll64.exe loaddll64.exe "C:\Users\user\Desktop\FastMath.dll.dll"
Source: C:\Windows\System32\loaddll64.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll64.exe Process created: C:\Windows\System32\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1
Source: C:\Windows\System32\cmd.exe Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1
Source: C:\Windows\System32\loaddll64.exe Process created: C:\Windows\System32\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1 Jump to behavior
Source: C:\Windows\System32\cmd.exe Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1 Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: apphelp.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: msvcp140.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: vcruntime140_1.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: vcruntime140.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: vcruntime140.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: vcruntime140_1.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: vcruntime140.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: windows.storage.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: wldp.dll Jump to behavior
Source: C:\Windows\System32\loaddll64.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: FastMath.dll.dll Static PE information: Image base 0x180000000 > 0x60000000
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IMPORT
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_RESOURCE
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_BASERELOC
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IAT
Source: FastMath.dll.dll Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT
Source: FastMath.dll.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: FastMath.dll.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IMPORT is in: .rdata
Source: FastMath.dll.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_RESOURCE is in: .rsrc
Source: FastMath.dll.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_BASERELOC is in: .reloc
Source: FastMath.dll.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG is in: .rdata
Source: FastMath.dll.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IAT is in: .rdata
Source: C:\Windows\System32\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
May sleep (evasive loops) to hinder dynamic analysis
Source: C:\Windows\System32\loaddll64.exe TID: 6024 Thread sleep time: -120000s >= -30000s 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\loaddll64.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\System32\cmd.exe Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\FastMath.dll.dll",#1 Jump to behavior
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Legend:

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  • 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: 1546674 Sample: FastMath.dll.exe Startdate: 01/11/2024 Architecture: WINDOWS Score: 22 15 AI detected suspicious sample 2->15 7 loaddll64.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