Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
7RSRU9IvVb.dll

Overview

General Information

Sample name:7RSRU9IvVb.dll
renamed because original name is a hash value
Original sample name:94b997ae84f0c19a1df6e5f4a05ff2d87e610014a5ecd0c9f5837b3c247fab80-payload-3.bin-.dll
Analysis ID:1588841
MD5:b34a753a81ca377d78b98832f79321e8
SHA1:61df330dc8369062dfe03392a5a55c0edf5047a0
SHA256:94b997ae84f0c19a1df6e5f4a05ff2d87e610014a5ecd0c9f5837b3c247fab80
Tags:dlluser-AzakaSekai
Infos:

Detection

Score:64
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
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)
Uses 32bit PE files

Classification

Process Tree

  • System is w10x64
  • loaddll32.exe (PID: 980 cmdline: loaddll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll" MD5: 51E6071F9CBA48E79F10C84515AAE618)
    • conhost.exe (PID: 3236 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
    • cmd.exe (PID: 2260 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1 MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B)
      • rundll32.exe (PID: 8 cmdline: rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1 MD5: 889B99C52A60DD49227C5E485A016679)
  • cleanup

Malware Configuration

⊘No configs have been found

Yara Signatures

⊘No yara matches

Sigma Signatures

⊘No Sigma rule has matched

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Antivirus / Scanner detection for submitted sample
Source: 7RSRU9IvVb.dllAvira: detected
Multi AV Scanner detection for submitted file
Source: 7RSRU9IvVb.dllVirustotal: Detection: 8%Perma Link
AI detected suspicious sample
Source: Submited SampleIntegrated Neural Analysis Model: Matched 96.0% probability
Machine Learning detection for sample
Source: 7RSRU9IvVb.dllJoe Sandbox ML: detected
Source: 7RSRU9IvVb.dllStatic PE information: EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE, 32BIT_MACHINE, DLL
Source: 7RSRU9IvVb.dllStatic PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Source: 7RSRU9IvVb.dllStatic PE information: EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE, 32BIT_MACHINE, DLL
Source: classification engineClassification label: mal64.winDLL@6/0@0/0
Source: C:\Windows\System32\conhost.exeMutant created: \Sessions\1\BaseNamedObjects\Local\SM0:3236:120:WilError_03
Source: 7RSRU9IvVb.dllStatic PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: 7RSRU9IvVb.dllStatic file information: TRID: Win32 Dynamic Link Library (generic) Net Framework (1011504/3) 50.14%
Source: C:\Windows\System32\loaddll32.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
Source: C:\Windows\SysWOW64\cmd.exeProcess created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1
Source: 7RSRU9IvVb.dllVirustotal: Detection: 8%
Source: unknownProcess created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll"
Source: C:\Windows\System32\loaddll32.exeProcess created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exeProcess created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1
Source: C:\Windows\SysWOW64\cmd.exeProcess created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1
Source: C:\Windows\System32\loaddll32.exeProcess created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exeProcess created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1Jump to behavior
Source: C:\Windows\System32\loaddll32.exeSection loaded: apphelp.dllJump to behavior
Source: C:\Windows\System32\loaddll32.exeSection loaded: kernel.appcore.dllJump to behavior
Source: C:\Windows\SysWOW64\cmd.exeSection loaded: apphelp.dllJump to behavior
Source: 7RSRU9IvVb.dllStatic PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: 7RSRU9IvVb.dllStatic PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE
Source: C:\Windows\SysWOW64\rundll32.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\System32\conhost.exeLast function: Thread delayed
Source: C:\Windows\System32\loaddll32.exeThread delayed: delay time: 120000Jump to behavior
Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\SysWOW64\cmd.exeProcess created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\7RSRU9IvVb.dll",#1Jump to behavior

Mitre Att&ck Matrix

ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management Instrumentation1
DLL Side-Loading		11
Process Injection		1
Rundll32		OS Credential Dumping1
Virtualization/Sandbox Evasion		Remote ServicesData from Local SystemData ObfuscationExfiltration Over Other Network MediumAbuse Accessibility Features
CredentialsDomainsDefault AccountsScheduled Task/JobBoot or Logon Initialization Scripts1
DLL Side-Loading		1
Virtualization/Sandbox Evasion		LSASS Memory1
System Information Discovery		Remote Desktop ProtocolData from Removable MediaJunk DataExfiltration Over BluetoothNetwork Denial of Service
Email AddressesDNS ServerDomain AccountsAtLogon Script (Windows)Logon Script (Windows)11
Process Injection		Security Account ManagerQuery RegistrySMB/Windows Admin SharesData from Network Shared DriveSteganographyAutomated ExfiltrationData Encrypted for Impact
Employee NamesVirtual Private ServerLocal AccountsCronLogin HookLogin Hook1
DLL Side-Loading		NTDSSystem Network Configuration DiscoveryDistributed Component Object ModelInput CaptureProtocol ImpersonationTraffic DuplicationData Destruction

Behavior Graph

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: 1588841 Sample: 7RSRU9IvVb.dll Startdate: 11/01/2025 Architecture: WINDOWS Score: 64 15 Antivirus / Scanner detection for submitted sample 2->15 17 Multi AV Scanner detection for submitted file 2->17 19 Machine Learning detection for sample 2->19 21 AI detected suspicious sample 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       

Screenshots

Thumbnails

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