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Analysis Report 964309_Invoice_confirmation.exe

Overview

General Information

Sample Name:964309_Invoice_confirmation.exe
Analysis ID:337282
MD5:84f07fb808c942462f3ab00c17782217
SHA1:b9044a839436619055ce9350d75293a2b28bb194
SHA256:02553b25344fd73b18ed90ab5fc8e9c11100734b429e90a0527cbc1aed79e6bd
Tags:exeGuLoader

Most interesting Screenshot:

Detection

GuLoader
Score:84
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Potential malicious icon found
Yara detected GuLoader
Executable has a suspicious name (potential lure to open the executable)
Initial sample is a PE file and has a suspicious name
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected VB6 Downloader Generic
Abnormal high CPU Usage
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
PE file contains strange resources
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)

Classification

Startup

  • System is w10x64
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: 964309_Invoice_confirmation.exe PID: 3484JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: 964309_Invoice_confirmation.exe PID: 3484JoeSecurity_GuLoaderYara detected GuLoaderJoe Security

      Sigma Overview

      No Sigma rule has matched

      Signature Overview

      Click to jump to signature section

      Show All Signature Results

      AV Detection:

      barindex
      Multi AV Scanner detection for submitted fileShow sources
      Source: 964309_Invoice_confirmation.exeReversingLabs: Detection: 13%
      Source: 964309_Invoice_confirmation.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

      System Summary:

      barindex
      Potential malicious icon foundShow sources
      Source: initial sampleIcon embedded in PE file: bad icon match: 20047c7c70f0e004
      Executable has a suspicious name (potential lure to open the executable)Show sources
      Source: 964309_Invoice_confirmation.exeStatic file information: Suspicious name
      Initial sample is a PE file and has a suspicious nameShow sources
      Source: initial sampleStatic PE information: Filename: 964309_Invoice_confirmation.exe
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess Stats: CPU usage > 98%
      Source: 964309_Invoice_confirmation.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: 964309_Invoice_confirmation.exe, 00000001.00000000.673641824.0000000000417000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameBrneko.exe vs 964309_Invoice_confirmation.exe
      Source: 964309_Invoice_confirmation.exe, 00000001.00000002.1843983752.00000000021D0000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs 964309_Invoice_confirmation.exe
      Source: 964309_Invoice_confirmation.exeBinary or memory string: OriginalFilenameBrneko.exe vs 964309_Invoice_confirmation.exe
      Source: 964309_Invoice_confirmation.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: classification engineClassification label: mal84.rans.troj.evad.winEXE@1/0@0/0
      Source: 964309_Invoice_confirmation.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
      Source: 964309_Invoice_confirmation.exeReversingLabs: Detection: 13%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: 964309_Invoice_confirmation.exe PID: 3484, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: 964309_Invoice_confirmation.exe PID: 3484, type: MEMORY
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00402420 push esi; iretd 1_2_0040243E
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_004078C7 push cs; retf 1_2_004078DE
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00407544 push edi; retf 1_2_0040756A
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00401657 push esi; iretd 1_2_00401663
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00408B03 push ds; retf 1_2_00408B0E
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00404BD9 push esp; retf 1_2_00404BDA
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_004077B8 push ss; iretd 1_2_004077F1
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425892 push 61000010h; ret 1_2_0042589F
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: 964309_Invoice_confirmation.exeBinary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXE
      Tries to detect virtualization through RDTSC time measurementsShow sources
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 000000000040433B second address: 000000000040433B instructions: 0x00000000 rdtsc 0x00000002 wait 0x00000003 nop 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F3DA0B9EEE6h 0x0000000c rdtsc
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_004041EB rdtsc 1_2_004041EB
      Source: 964309_Invoice_confirmation.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_004041EB rdtsc 1_2_004041EB
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_0042505B mov eax, dword ptr fs:[00000030h]1_2_0042505B
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425A51 mov eax, dword ptr fs:[00000030h]1_2_00425A51
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425A6A mov eax, dword ptr fs:[00000030h]1_2_00425A6A
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00424A0A mov eax, dword ptr fs:[00000030h]1_2_00424A0A
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425A33 mov eax, dword ptr fs:[00000030h]1_2_00425A33
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425A39 mov eax, dword ptr fs:[00000030h]1_2_00425A39
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00425AA5 mov eax, dword ptr fs:[00000030h]1_2_00425AA5
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_00422EEF mov eax, dword ptr fs:[00000030h]1_2_00422EEF
      Source: 964309_Invoice_confirmation.exe, 00000001.00000002.1843804110.0000000000DA0000.00000002.00000001.sdmpBinary or memory string: Program Manager
      Source: 964309_Invoice_confirmation.exe, 00000001.00000002.1843804110.0000000000DA0000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: 964309_Invoice_confirmation.exe, 00000001.00000002.1843804110.0000000000DA0000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: 964309_Invoice_confirmation.exe, 00000001.00000002.1843804110.0000000000DA0000.00000002.00000001.sdmpBinary or memory string: Progmanlock
      Source: C:\Users\user\Desktop\964309_Invoice_confirmation.exeCode function: 1_2_0042375C cpuid 1_2_0042375C

      Mitre Att&ck Matrix

      Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
      Valid AccountsWindows Management InstrumentationPath InterceptionProcess Injection1Process Injection1OS Credential DumpingSecurity Software Discovery211Remote ServicesData from Local SystemExfiltration Over Other Network MediumData ObfuscationEavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
      Default AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsObfuscated Files or Information1LSASS MemoryProcess Discovery1Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothJunk DataExploit SS7 to Redirect Phone Calls/SMSRemotely Wipe Data Without AuthorizationDevice Lockout
      Domain AccountsAt (Linux)Logon Script (Windows)Logon Script (Windows)Obfuscated Files or InformationSecurity Account ManagerSystem Information Discovery111SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data

      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

      Screenshots

      Thumbnails

      This section contains all screenshots as thumbnails, including those not shown in the slideshow.