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Analysis Report 21558_Invoice_confirmation.exe

Overview

General Information

Sample Name:21558_Invoice_confirmation.exe
Analysis ID:337759
MD5:2c4f59a6c931a328dd5d6113c995c35b
SHA1:51e56d7fb64cc3a071b12410bcecbf38675fadcc
SHA256:859bd0c7c174ff2237da9fac27c2feb0e0bbbfe536b273a495440ccd3b748729
Tags:exeGuLoader

Most interesting Screenshot:

Errors
  • Sigma syntax error: Has an empty selector, Rule: Abusing Azure Browser SSO

Detection

GuLoader
Score:76
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

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 detect virtual machines (SGDT)
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: 21558_Invoice_confirmation.exe PID: 7052JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052JoeSecurity_GuLoaderYara detected GuLoaderJoe Security

      Sigma Overview

      No Sigma rule has matched

      Signature Overview

      Click to jump to signature section

      Show All Signature Results
      Source: 21558_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: 21558_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: 21558_Invoice_confirmation.exe
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeProcess Stats: CPU usage > 98%
      Source: 21558_Invoice_confirmation.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398199064.0000000002090000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs 21558_Invoice_confirmation.exe
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1397787159.0000000000416000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameASSACU.exe vs 21558_Invoice_confirmation.exe
      Source: 21558_Invoice_confirmation.exeBinary or memory string: OriginalFilenameASSACU.exe vs 21558_Invoice_confirmation.exe
      Source: 21558_Invoice_confirmation.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: classification engineClassification label: mal76.rans.troj.evad.winEXE@1/0@0/0
      Source: 21558_Invoice_confirmation.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052, type: MEMORY
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_00404F88 push cs; iretd 0_2_00404F96
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F366A push ebp; retf 0_2_004F4222
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F4230 push ebp; retf 0_2_004F4222
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F12CC push ebp; retf 0_2_004F4222
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F4368 push C8F1A01Fh; iretd 0_2_004F4375
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\21558_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: 21558_Invoice_confirmation.exe, 00000000.00000002.1397946122.00000000004F0000.00000040.00000001.sdmpBinary 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\21558_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 0000000000404336 second address: 0000000000404336 instructions: 0x00000000 rdtsc 0x00000002 wait 0x00000003 nop 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F3534BA1396h 0x0000000c rdtsc
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_0040432C rdtsc 0_2_0040432C
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F2A03 sgdt fword ptr [eax]0_2_004F2A03
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1397946122.00000000004F0000.00000040.00000001.sdmpBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_0040432C rdtsc 0_2_0040432C
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F49C6 mov eax, dword ptr fs:[00000030h]0_2_004F49C6
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F4D8B mov eax, dword ptr fs:[00000030h]0_2_004F4D8B
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F56FE mov eax, dword ptr fs:[00000030h]0_2_004F56FE
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F56F9 mov eax, dword ptr fs:[00000030h]0_2_004F56F9
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F2E83 mov eax, dword ptr fs:[00000030h]0_2_004F2E83
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F5749 mov eax, dword ptr fs:[00000030h]0_2_004F5749
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F5761 mov eax, dword ptr fs:[00000030h]0_2_004F5761
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F5779 mov eax, dword ptr fs:[00000030h]0_2_004F5779
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F5713 mov eax, dword ptr fs:[00000030h]0_2_004F5713
      Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exeCode function: 0_2_004F572B mov eax, dword ptr fs:[00000030h]0_2_004F572B
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmpBinary or memory string: &Program Manager
      Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmpBinary or memory string: Progmanlock

      Mitre Att&ck Matrix

      Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
      Valid AccountsWindows Management InstrumentationPath InterceptionProcess Injection1Virtualization/Sandbox Evasion1OS 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 ScriptsProcess Injection1LSASS MemoryVirtualization/Sandbox Evasion1Remote 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 Information1Security Account ManagerProcess Discovery1SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data
      Local AccountsAt (Windows)Logon Script (Mac)Logon Script (Mac)Binary PaddingNTDSSystem Information Discovery11Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud

      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.