Loading ...

Play interactive tourEdit tour

Analysis Report 315800_Invoice_confirmation.exe

Overview

General Information

Sample Name:315800_Invoice_confirmation.exe
Analysis ID:337599
MD5:18e2c9f5c6e870ffd1e639e286ab38bc
SHA1:a87e892f654ae12167b934eef883562e6d7284ba
SHA256:91a75290effdceda2b1b0a8c2a16db9e172f406ae6ecce19539b0bdc5656613f
Tags:CharterexeGuLoader

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 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: 315800_Invoice_confirmation.exe PID: 6016JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: 315800_Invoice_confirmation.exe PID: 6016JoeSecurity_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: 315800_Invoice_confirmation.exeReversingLabs: Detection: 10%
      Source: 315800_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: 315800_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: 315800_Invoice_confirmation.exe
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess Stats: CPU usage > 98%
      Source: 315800_Invoice_confirmation.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: 315800_Invoice_confirmation.exe, 00000000.00000000.248945860.0000000000417000.00000002.00020000.sdmpBinary or memory string: OriginalFilenamegeochr.exe vs 315800_Invoice_confirmation.exe
      Source: 315800_Invoice_confirmation.exeBinary or memory string: OriginalFilenamegeochr.exe vs 315800_Invoice_confirmation.exe
      Source: 315800_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: 315800_Invoice_confirmation.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dll
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers
      Source: 315800_Invoice_confirmation.exeReversingLabs: Detection: 10%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: 315800_Invoice_confirmation.exe PID: 6016, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: 315800_Invoice_confirmation.exe PID: 6016, type: MEMORY
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00408627 push ss; iretd
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00406B64 push 0000005Fh; iretd
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00408578 push ss; iretd
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOX
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOX
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOX
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOX
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOX

      Malware Analysis System Evasion:

      barindex
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: 315800_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\315800_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 0000000000404336 second address: 0000000000404336 instructions: 0x00000000 rdtsc 0x00000002 wait 0x00000003 wait 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F7040C3D2D6h 0x0000000c rdtsc
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_004230E9 rdtsc
      Source: 315800_Invoice_confirmation.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_004230E9 rdtsc
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00425177 mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00424B45 mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00424B52 mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00425C5D mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00425C62 mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00425C2E mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00422D7B mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00421EDA mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00421E92 mov eax, dword ptr fs:[00000030h]
      Source: C:\Users\user\Desktop\315800_Invoice_confirmation.exeCode function: 0_2_00421EA6 mov eax, dword ptr fs:[00000030h]
      Source: 315800_Invoice_confirmation.exe, 00000000.00000002.1263784785.0000000000CC0000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: 315800_Invoice_confirmation.exe, 00000000.00000002.1263784785.0000000000CC0000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: 315800_Invoice_confirmation.exe, 00000000.00000002.1263784785.0000000000CC0000.00000002.00000001.sdmpBinary or memory string: SProgram Managerl
      Source: 315800_Invoice_confirmation.exe, 00000000.00000002.1263784785.0000000000CC0000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd,
      Source: 315800_Invoice_confirmation.exe, 00000000.00000002.1263784785.0000000000CC0000.00000002.00000001.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 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 Discovery11SMB/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.

      windows-stand

      Antivirus, Machine Learning and Genetic Malware Detection

      Initial Sample

      SourceDetectionScannerLabelLink
      315800_Invoice_confirmation.exe11%ReversingLabsWin32.Trojan.Generic

      Dropped Files

      No Antivirus matches

      Unpacked PE Files

      No Antivirus matches

      Domains

      No Antivirus matches

      URLs

      No Antivirus matches

      Domains and IPs

      Contacted Domains

      No contacted domains info

      Contacted IPs

      No contacted IP infos

      General Information

      Joe Sandbox Version:31.0.0 Red Diamond
      Analysis ID:337599
      Start date:08.01.2021
      Start time:20:08:44
      Joe Sandbox Product:CloudBasic
      Overall analysis duration:0h 11m 2s
      Hypervisor based Inspection enabled:false
      Report type:light
      Sample file name:315800_Invoice_confirmation.exe
      Cookbook file name:default.jbs
      Analysis system description:Windows 10 64 bit v1803 with Office Professional Plus 2016, Chrome 85, IE 11, Adobe Reader DC 19, Java 8 Update 211
      Number of analysed new started processes analysed:38
      Number of new started drivers analysed:0
      Number of existing processes analysed:0
      Number of existing drivers analysed:0
      Number of injected processes analysed:0
      Technologies:
      • HCA enabled
      • EGA enabled
      • HDC enabled
      • AMSI enabled
      Analysis Mode:default
      Analysis stop reason:Timeout
      Detection:MAL
      Classification:mal84.rans.troj.evad.winEXE@1/0@0/0
      EGA Information:Failed
      HDC Information:
      • Successful, ratio: 10% (good quality ratio 5.4%)
      • Quality average: 29.4%
      • Quality standard deviation: 31.6%
      HCA Information:Failed
      Cookbook Comments:
      • Adjust boot time
      • Enable AMSI
      • Found application associated with file extension: .exe
      • Override analysis time to 240s for sample files taking high CPU consumption
      Warnings:
      Show All
      • Exclude process from analysis (whitelisted): MpCmdRun.exe, audiodg.exe, BackgroundTransferHost.exe, RuntimeBroker.exe, WMIADAP.exe, MusNotifyIcon.exe, backgroundTaskHost.exe, SgrmBroker.exe, conhost.exe, svchost.exe, wuapihost.exe

      Simulations

      Behavior and APIs

      No simulations

      Joe Sandbox View / Context

      IPs

      No context

      Domains

      No context

      ASN

      No context

      JA3 Fingerprints

      No context

      Dropped Files

      No context

      Created / dropped Files

      No created / dropped files found

      Static File Info

      General

      File type:PE32 executable (GUI) Intel 80386, for MS Windows
      Entropy (8bit):5.64320248973294
      TrID:
      • Win32 Executable (generic) a (10002005/4) 99.96%
      • Generic Win/DOS Executable (2004/3) 0.02%
      • DOS Executable Generic (2002/1) 0.02%
      • Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.00%
      File name:315800_Invoice_confirmation.exe
      File size:94208
      MD5:18e2c9f5c6e870ffd1e639e286ab38bc
      SHA1:a87e892f654ae12167b934eef883562e6d7284ba
      SHA256:91a75290effdceda2b1b0a8c2a16db9e172f406ae6ecce19539b0bdc5656613f
      SHA512:3236b71e290b486febef1b60f9fcdb0f84f4595f1605c2fef9b49c85537dc86c8d51d15eb6c93e84a369aacc28c39c00be0ae0ad542a9ba3666c3367262ffc5d
      SSDEEP:768:JSxchMqP008iO0kx/BGJZwI6Zqp5X5LwxBS0kCjYjt8/mTk2ZISmQwEVH8ZvBaWY:phMp52f5LwbWumT1oREVH8Xx2
      File Content Preview:MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$........6...W...W...W...K...W...u...W...q...W..Rich.W..........................PE..L....[._.................@...0...............P....@

      File Icon

      Icon Hash:20047c7c70f0e004

      Static PE Info

      General

      Entrypoint:0x401600
      Entrypoint Section:.text
      Digitally signed:false
      Imagebase:0x400000
      Subsystem:windows gui
      Image File Characteristics:LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      DLL Characteristics:
      Time Stamp:0x5FF85B8B [Fri Jan 8 13:18:03 2021 UTC]
      TLS Callbacks:
      CLR (.Net) Version:
      OS Version Major:4
      OS Version Minor:0
      File Version Major:4
      File Version Minor:0
      Subsystem Version Major:4
      Subsystem Version Minor:0
      Import Hash:690ed9eee3aab240a93936dee17050b4

      Entrypoint Preview

      Instruction
      push 00401C64h
      call 00007F70410BA195h
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      xor byte ptr [eax], al
      add byte ptr [eax], al
      cmp byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      adc al, 26h
      daa
      cdq
      cwde
      test dword ptr [ebx+04D58C4Ah], D1E7AB14h
      scasb
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add dword ptr [eax], eax
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      push ebx
      je 00007F70410BA214h
      outsd
      add byte ptr fs:[eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      dec esp
      xor dword ptr [eax], eax
      sbb dword ptr [ebp-5AEB9045h], eax
      add dword ptr [edx+41h], FFFFFF80h
      movsb
      nop
      aam 60h
      mov ebp, 466C97E5h
      and ebp, dword ptr [esp+ecx*4+36h]
      dec edx
      inc edi
      test al, 12h
      inc esi
      inc edi
      mov dword ptr [edx-6Fh], esi
      stosd
      cmp cl, byte ptr [edi-53h]
      xor ebx, dword ptr [ecx-48EE309Ah]
      or al, 00h
      stosb
      add byte ptr [eax-2Dh], ah
      xchg eax, ebx
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      add byte ptr [eax], al
      test dword ptr [ebx], 003F0000h
      add byte ptr [eax], al
      add byte ptr [4E554600h], al
      dec ebx
      push esp
      add byte ptr [46000601h], cl
      inc ecx
      push ebx
      push esp
      push ebx
      dec esp
      add byte ptr [ecx], bl
      add dword ptr [eax], eax
      inc edx
      add byte ptr [edx], ah
      add eax, 46000624h

      Data Directories

      NameVirtual AddressVirtual Size Is in Section
      IMAGE_DIRECTORY_ENTRY_EXPORT0x00x0
      IMAGE_DIRECTORY_ENTRY_IMPORT0x13c640x28.text
      IMAGE_DIRECTORY_ENTRY_RESOURCE0x170000x89c.rsrc
      IMAGE_DIRECTORY_ENTRY_EXCEPTION0x00x0
      IMAGE_DIRECTORY_ENTRY_SECURITY0x00x0
      IMAGE_DIRECTORY_ENTRY_BASERELOC0x00x0
      IMAGE_DIRECTORY_ENTRY_DEBUG0x00x0
      IMAGE_DIRECTORY_ENTRY_COPYRIGHT0x00x0
      IMAGE_DIRECTORY_ENTRY_GLOBALPTR0x00x0
      IMAGE_DIRECTORY_ENTRY_TLS0x00x0
      IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG0x00x0
      IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT0x2380x20
      IMAGE_DIRECTORY_ENTRY_IAT0x10000x184.text
      IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT0x00x0
      IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR0x00x0
      IMAGE_DIRECTORY_ENTRY_RESERVED0x00x0

      Sections

      NameVirtual AddressVirtual SizeRaw SizeXored PEZLIB ComplexityFile TypeEntropyCharacteristics
      .text0x10000x132480x14000False0.397985839844data6.09132566507IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      .data0x150000x14b00x1000False0.00634765625data0.0IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ
      .rsrc0x170000x89c0x1000False0.16015625data1.83715099112IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ

      Resources

      NameRVASizeTypeLanguageCountry
      RT_ICON0x1776c0x130data
      RT_ICON0x174840x2e8data
      RT_ICON0x1735c0x128GLS_BINARY_LSB_FIRST
      RT_GROUP_ICON0x1732c0x30data
      RT_VERSION0x171500x1dcdataChineseTaiwan

      Imports

      DLLImport
      MSVBVM60.DLL_CIcos, _adj_fptan, __vbaHresultCheck, __vbaVarMove, __vbaFreeVar, __vbaLenBstr, __vbaFreeVarList, _adj_fdiv_m64, __vbaFreeObjList, _adj_fprem1, __vbaStrCat, __vbaHresultCheckObj, __vbaLenBstrB, _adj_fdiv_m32, __vbaAryDestruct, __vbaLateMemSt, __vbaExitProc, __vbaObjSet, __vbaOnError, _adj_fdiv_m16i, __vbaObjSetAddref, _adj_fdivr_m16i, __vbaFpR8, _CIsin, __vbaChkstk, EVENT_SINK_AddRef, __vbaStrCmp, __vbaVarTstEq, __vbaAryConstruct2, __vbaR4Str, __vbaObjVar, DllFunctionCall, _adj_fpatan, __vbaLateIdCallLd, __vbaRedim, EVENT_SINK_Release, _CIsqrt, EVENT_SINK_QueryInterface, __vbaExceptHandler, _adj_fprem, _adj_fdivr_m64, __vbaFPException, __vbaStrVarVal, __vbaDateVar, _CIlog, __vbaFileOpen, __vbaNew2, __vbaInStr, _adj_fdiv_m32i, _adj_fdivr_m32i, __vbaStrCopy, __vbaFreeStrList, _adj_fdivr_m32, _adj_fdiv_r, __vbaI4Var, __vbaVarDup, __vbaLateMemCallLd, _CIatan, __vbaStrMove, __vbaUI1Str, _allmul, _CItan, __vbaFPInt, _CIexp, __vbaFreeStr, __vbaFreeObj

      Version Infos

      DescriptionData
      Translation0x0404 0x04b0
      ProductVersion1.00
      InternalNamegeochr
      FileVersion1.00
      OriginalFilenamegeochr.exe
      ProductNameLogaritm

      Possible Origin

      Language of compilation systemCountry where language is spokenMap
      ChineseTaiwan

      Network Behavior

      No network behavior found

      Code Manipulations

      Statistics

      System Behavior

      General

      Start time:20:09:45
      Start date:08/01/2021
      Path:C:\Users\user\Desktop\315800_Invoice_confirmation.exe
      Wow64 process (32bit):true
      Commandline:'C:\Users\user\Desktop\315800_Invoice_confirmation.exe'
      Imagebase:0x400000
      File size:94208 bytes
      MD5 hash:18E2C9F5C6E870FFD1E639E286AB38BC
      Has elevated privileges:true
      Has administrator privileges:true
      Programmed in:Visual Basic
      Reputation:low

      Disassembly

      Code Analysis

      Reset < >