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Analysis Report qhw7KZSA53.exe

Overview

General Information

Sample Name:qhw7KZSA53.exe
Analysis ID:396529
MD5:4b7687321980c96093c8e6a43b764728
SHA1:5e27cc0eddb8646e26b72a7ff4f608df45c0eb8a
SHA256:3a51813adeabd17d4939280137288152b2a3f25f7bf9e738c8f25df5ef49be31
Tags:exeGuLoader
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Potential malicious icon found
Yara detected GuLoader
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Found potential dummy code loops (likely to delay analysis)
Machine Learning detection for sample
Potential time zone aware malware
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
Creates a DirectInput object (often for capturing keystrokes)
PE file contains an invalid checksum
PE file contains strange resources
Program does not show much activity (idle)
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
  • qhw7KZSA53.exe (PID: 5380 cmdline: 'C:\Users\user\Desktop\qhw7KZSA53.exe' MD5: 4B7687321980C96093C8E6A43B764728)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: qhw7KZSA53.exe PID: 5380JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: qhw7KZSA53.exe PID: 5380JoeSecurity_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
      Antivirus / Scanner detection for submitted sampleShow sources
      Source: qhw7KZSA53.exeAvira: detected
      Multi AV Scanner detection for submitted fileShow sources
      Source: qhw7KZSA53.exeVirustotal: Detection: 24%Perma Link
      Source: qhw7KZSA53.exeReversingLabs: Detection: 23%
      Machine Learning detection for sampleShow sources
      Source: qhw7KZSA53.exeJoe Sandbox ML: detected
      Source: qhw7KZSA53.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: qhw7KZSA53.exe, 00000001.00000002.740127231.00000000006EA000.00000004.00000020.sdmpBinary or memory string: <HOOK MODULE="DDRAW.DLL" FUNCTION="DirectDrawCreateEx"/>

      System Summary:

      barindex
      Potential malicious icon foundShow sources
      Source: initial sampleIcon embedded in PE file: bad icon match: 20047c7c70f0e004
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeProcess Stats: CPU usage > 98%
      Source: qhw7KZSA53.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: qhw7KZSA53.exe, 00000001.00000002.739651089.0000000000418000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameIntuitioners4.exe vs qhw7KZSA53.exe
      Source: qhw7KZSA53.exe, 00000001.00000002.740662074.00000000020C0000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs qhw7KZSA53.exe
      Source: qhw7KZSA53.exeBinary or memory string: OriginalFilenameIntuitioners4.exe vs qhw7KZSA53.exe
      Source: qhw7KZSA53.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: classification engineClassification label: mal100.rans.troj.evad.winEXE@1/0@0/0
      Source: qhw7KZSA53.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
      Source: qhw7KZSA53.exeVirustotal: Detection: 24%
      Source: qhw7KZSA53.exeReversingLabs: Detection: 23%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: qhw7KZSA53.exe PID: 5380, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: qhw7KZSA53.exe PID: 5380, type: MEMORY
      Source: qhw7KZSA53.exeStatic PE information: real checksum: 0x22441 should be: 0x1f32c
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_00405E52 push ebx; ret 1_2_00405E77
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_004042D6 push ecx; iretd 1_2_00404423
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_00402B60 push edi; retf 1_2_00402B64
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_00406909 pushfd ; iretd 1_2_0040690F
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_0040430F push ecx; iretd 1_2_00404423
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A664EE push eax; ret 1_2_02A664EF
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A61CCE pushfd ; iretd 1_2_02A61CCF
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A61CDD pushfd ; iretd 1_2_02A61CF6
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Detected RDTSC dummy instruction sequence (likely for instruction hammering)Show sources
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A65981 second address: 0000000002A65981 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a mov ebx, edx 0x0000000c shl edx, 05h 0x0000000f add edx, ebx 0x00000011 movzx ebx, byte ptr [esi] 0x00000014 jmp 00007FE2343B27FAh 0x00000016 cmp ah, FFFFFF9Ch 0x00000019 add edx, ebx 0x0000001b xor edx, 34C63380h 0x00000021 test ah, dh 0x00000023 add esi, 02h 0x00000026 cmp word ptr [esi], 0000h 0x0000002a jne 00007FE2343B279Dh 0x0000002c pushad 0x0000002d rdtsc
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A6593A second address: 0000000002A6593A instructions:
      Potential time zone aware malwareShow sources
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeSystem information queried: CurrentTimeZoneInformationJump to behavior
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: qhw7KZSA53.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\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A65981 second address: 0000000002A65981 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a mov ebx, edx 0x0000000c shl edx, 05h 0x0000000f add edx, ebx 0x00000011 movzx ebx, byte ptr [esi] 0x00000014 jmp 00007FE2343B27FAh 0x00000016 cmp ah, FFFFFF9Ch 0x00000019 add edx, ebx 0x0000001b xor edx, 34C63380h 0x00000021 test ah, dh 0x00000023 add esi, 02h 0x00000026 cmp word ptr [esi], 0000h 0x0000002a jne 00007FE2343B279Dh 0x0000002c pushad 0x0000002d rdtsc
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A6593A second address: 0000000002A6593A instructions:
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A65BF8 second address: 0000000002A65BB5 instructions: 0x00000000 rdtsc 0x00000002 xor eax, eax 0x00000004 inc eax 0x00000005 cpuid 0x00000007 popad 0x00000008 call 00007FE2343B2805h 0x0000000d lfence 0x00000010 mov edx, dword ptr [7FFE0014h] 0x00000016 lfence 0x00000019 ret 0x0000001a sub edx, esi 0x0000001c ret 0x0000001d test bx, dx 0x00000020 add edi, edx 0x00000022 pushad 0x00000023 mov ecx, 00000072h 0x00000028 rdtsc
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeRDTSC instruction interceptor: First address: 0000000002A65BB5 second address: 0000000002A65BF8 instructions: 0x00000000 rdtsc 0x00000002 popad 0x00000003 dec dword ptr [ebp+000000F8h] 0x00000009 cmp dword ptr [ebp+000000F8h], 00000000h 0x00000010 jne 00007FE234EF328Eh 0x00000012 test ah, dh 0x00000014 call 00007FE234EF32FBh 0x00000019 call 00007FE234EF32E5h 0x0000001e lfence 0x00000021 mov edx, dword ptr [7FFE0014h] 0x00000027 lfence 0x0000002a ret 0x0000002b mov esi, edx 0x0000002d pushad 0x0000002e rdtsc
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A65695 rdtsc 1_2_02A65695
      Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
      Source: qhw7KZSA53.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

      Anti Debugging:

      barindex
      Found potential dummy code loops (likely to delay analysis)Show sources
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeProcess Stats: CPU usage > 90% for more than 60s
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A65695 rdtsc 1_2_02A65695
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A632A5 mov eax, dword ptr fs:[00000030h]1_2_02A632A5
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A632A2 mov eax, dword ptr fs:[00000030h]1_2_02A632A2
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A61B93 mov eax, dword ptr fs:[00000030h]1_2_02A61B93
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A6249B mov eax, dword ptr fs:[00000030h]1_2_02A6249B
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A658C4 mov eax, dword ptr fs:[00000030h]1_2_02A658C4
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A62463 mov eax, dword ptr fs:[00000030h]1_2_02A62463
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A62460 mov eax, dword ptr fs:[00000030h]1_2_02A62460
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A6218F mov eax, dword ptr fs:[00000030h]1_2_02A6218F
      Source: C:\Users\user\Desktop\qhw7KZSA53.exeCode function: 1_2_02A65169 mov eax, dword ptr fs:[00000030h]1_2_02A65169
      Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
      Source: qhw7KZSA53.exe, 00000001.00000002.740293607.0000000000C70000.00000002.00000001.sdmpBinary or memory string: Program Manager
      Source: qhw7KZSA53.exe, 00000001.00000002.740293607.0000000000C70000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: qhw7KZSA53.exe, 00000001.00000002.740293607.0000000000C70000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: qhw7KZSA53.exe, 00000001.00000002.740293607.0000000000C70000.00000002.00000001.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 Evasion11Input Capture1System Time Discovery1Remote ServicesInput Capture1Exfiltration 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 MemorySecurity Software Discovery411Remote 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 ManagerVirtualization/Sandbox Evasion11SMB/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 PaddingNTDSProcess Discovery1Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud
      Cloud AccountsCronNetwork Logon ScriptNetwork Logon ScriptSoftware PackingLSA SecretsSystem Information Discovery21SSHKeyloggingData Transfer Size LimitsFallback ChannelsManipulate Device CommunicationManipulate App Store Rankings or Ratings

      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.