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Analysis Report 15790_Invoice_confirmation.exe

Overview

General Information

Sample Name:15790_Invoice_confirmation.exe
Analysis ID:337718
MD5:9090a8a77646971374cea3112aa3beed
SHA1:bfd3e70ce4230d04e97a9ed394bfabf287a5bfe7
SHA256:c4e0e2bc76880e6144bbc96ad64e55bd10f6f66805ccfd5a86c36182201372eb
Tags:exeGuLoader

Most interesting Screenshot:

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

Detection

GuLoader
Score:80
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Potential malicious icon found
Yara detected GuLoader
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
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
Creates a DirectInput object (often for capturing keystrokes)
Detected potential crypto function
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: 15790_Invoice_confirmation.exe PID: 5668JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: 15790_Invoice_confirmation.exe PID: 5668JoeSecurity_GuLoaderYara detected GuLoaderJoe Security

      Sigma Overview

      No Sigma rule has matched

      Signature Overview

      Click to jump to signature section

      Show All Signature Results
      Source: 15790_Invoice_confirmation.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389175473.00000000006CA000.00000004.00000020.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
      Executable has a suspicious name (potential lure to open the executable)Show sources
      Source: 15790_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: 15790_Invoice_confirmation.exe
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeProcess Stats: CPU usage > 98%
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_004016000_2_00401600
      Source: 15790_Invoice_confirmation.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1388743557.0000000000417000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameklist.exe vs 15790_Invoice_confirmation.exe
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389068575.0000000000600000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs 15790_Invoice_confirmation.exe
      Source: 15790_Invoice_confirmation.exeBinary or memory string: OriginalFilenameklist.exe vs 15790_Invoice_confirmation.exe
      Source: 15790_Invoice_confirmation.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: classification engineClassification label: mal80.rans.troj.evad.winEXE@1/0@0/0
      Source: 15790_Invoice_confirmation.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\15790_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: 15790_Invoice_confirmation.exe PID: 5668, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: 15790_Invoice_confirmation.exe PID: 5668, type: MEMORY
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00407878 push 6B7AF3E2h; ret 0_2_004078A6
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040A438 pushad ; retf 0_2_0040A443
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040903B push FFFFFFEBh; ret 0_2_0040903F
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_004058D8 push ebx; iretd 0_2_004058E9
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_004058EB push ebx; iretd 0_2_004058E9
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040A4F9 push ebx; retf 0_2_0040A570
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040A572 push ebx; retf 0_2_0040A570
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00407181 push FFFFFFEBh; ret 0_2_00407183
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00407E5C pushfd ; ret 0_2_00407E6D
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00407EA9 pushfd ; ret 0_2_00407E6D
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040775D push 6B7AF3E2h; ret 0_2_004078A6
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040A72F push esi; ret 0_2_0040A732
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0040A7D2 push ebp; ret 0_2_0040A7E2
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00635D00 push eax; ret 0_2_00635D01
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.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\15790_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 000000000040433A second address: 000000000040433A instructions: 0x00000000 rdtsc 0x00000002 nop 0x00000003 nop 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F9CE8932DB6h 0x0000000c rdtsc
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 0000000000633264 second address: 0000000000633264 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F9CE8936B98h 0x0000000f lfence 0x00000012 mov edx, dword ptr [7FFE0014h] 0x00000018 lfence 0x0000001b ret 0x0000001c sub edx, esi 0x0000001e ret 0x0000001f pop ecx 0x00000020 add edi, edx 0x00000022 jmp 00007F9CE8936B9Eh 0x00000024 test bh, ah 0x00000026 dec ecx 0x00000027 cmp ecx, 00000000h 0x0000002a jne 00007F9CE8936B73h 0x0000002c push ecx 0x0000002d call 00007F9CE8936BDEh 0x00000032 call 00007F9CE8936BAAh 0x00000037 lfence 0x0000003a mov edx, dword ptr [7FFE0014h] 0x00000040 lfence 0x00000043 ret 0x00000044 mov esi, edx 0x00000046 pushad 0x00000047 rdtsc
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: 15790_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\15790_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 000000000040433A second address: 000000000040433A instructions: 0x00000000 rdtsc 0x00000002 nop 0x00000003 nop 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F9CE8932DB6h 0x0000000c rdtsc
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeRDTSC instruction interceptor: First address: 0000000000633264 second address: 0000000000633264 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F9CE8936B98h 0x0000000f lfence 0x00000012 mov edx, dword ptr [7FFE0014h] 0x00000018 lfence 0x0000001b ret 0x0000001c sub edx, esi 0x0000001e ret 0x0000001f pop ecx 0x00000020 add edi, edx 0x00000022 jmp 00007F9CE8936B9Eh 0x00000024 test bh, ah 0x00000026 dec ecx 0x00000027 cmp ecx, 00000000h 0x0000002a jne 00007F9CE8936B73h 0x0000002c push ecx 0x0000002d call 00007F9CE8936BDEh 0x00000032 call 00007F9CE8936BAAh 0x00000037 lfence 0x0000003a mov edx, dword ptr [7FFE0014h] 0x00000040 lfence 0x00000043 ret 0x00000044 mov esi, edx 0x00000046 pushad 0x00000047 rdtsc
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0063347D rdtsc 0_2_0063347D
      Source: 15790_Invoice_confirmation.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0063347D rdtsc 0_2_0063347D
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0063507E mov eax, dword ptr fs:[00000030h]0_2_0063507E
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00634C05 mov eax, dword ptr fs:[00000030h]0_2_00634C05
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_006330D4 mov eax, dword ptr fs:[00000030h]0_2_006330D4
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00631CDD mov eax, dword ptr fs:[00000030h]0_2_00631CDD
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_00631D05 mov eax, dword ptr fs:[00000030h]0_2_00631D05
      Source: C:\Users\user\Desktop\15790_Invoice_confirmation.exeCode function: 0_2_0063171E mov eax, dword ptr fs:[00000030h]0_2_0063171E
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389313697.0000000000D50000.00000002.00000001.sdmpBinary or memory string: Program Manager
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389313697.0000000000D50000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389313697.0000000000D50000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: 15790_Invoice_confirmation.exe, 00000000.00000002.1389313697.0000000000D50000.00000002.00000001.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 Injection1Input Capture1Security Software Discovery311Remote ServicesInput Capture1Exfiltration Over Other Network MediumEncrypted Channel1Eavesdrop 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 ProtocolArchive Collected Data1Exfiltration 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 Discovery21SMB/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.