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Analysis Report AWB20082020_pdf.exe

Overview

General Information

Sample Name:AWB20082020_pdf.exe
Analysis ID:272816
MD5:2056f5a7ef35dea1b7fd29dd169da669
SHA1:2e5a997d42d2470228eeed05a66fb3643300abea
SHA256:967ea109385c23aa2c0a841295eb33b1f25d25b836903cbabe33a9c1fb2ee267

Most interesting Screenshot:

Detection

GuLoader
Score:68
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Potential malicious icon found
Yara detected GuLoader
Initial sample is a PE file and has a suspicious name
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
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Uses code obfuscation techniques (call, push, ret)

Classification

Startup

  • System is w10x64
  • AWB20082020_pdf.exe (PID: 6788 cmdline: 'C:\Users\user\Desktop\AWB20082020_pdf.exe' MD5: 2056F5A7EF35DEA1B7FD29DD169DA669)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: AWB20082020_pdf.exe PID: 6788JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: AWB20082020_pdf.exe PID: 6788JoeSecurity_GuLoaderYara detected GuLoaderJoe Security

      Sigma Overview

      No Sigma rule has matched

      Signature Overview

      Click to jump to signature section

      Show All Signature Results

      System Summary:

      barindex
      Potential malicious icon foundShow sources
      Source: initial sampleIcon embedded in PE file: bad icon match: 20047c7c70f0e004
      Initial sample is a PE file and has a suspicious nameShow sources
      Source: initial sampleStatic PE information: Filename: AWB20082020_pdf.exe
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeProcess Stats: CPU usage > 98%
      Source: AWB20082020_pdf.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: AWB20082020_pdf.exe, 00000000.00000000.212242250.0000000000409000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameuddy.exe vs AWB20082020_pdf.exe
      Source: AWB20082020_pdf.exe, 00000000.00000002.481357324.0000000002080000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs AWB20082020_pdf.exe
      Source: AWB20082020_pdf.exeBinary or memory string: OriginalFilenameuddy.exe vs AWB20082020_pdf.exe
      Source: classification engineClassification label: mal68.rans.troj.evad.winEXE@1/0@0/0
      Source: AWB20082020_pdf.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\AWB20082020_pdf.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: AWB20082020_pdf.exe PID: 6788, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: AWB20082020_pdf.exe PID: 6788, type: MEMORY
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_0040126C push es; retf 4031h0_2_0040128C
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_00404020 push edx; retf 0_2_00404157
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_00403096 push ds; ret 0_2_004030A3
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_00404149 push edx; retf 0_2_00404157
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_00404159 push edx; retf 0_2_00404157
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Tries to detect virtualization through RDTSC time measurementsShow sources
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeRDTSC instruction interceptor: First address: 00000000020E2572 second address: 00000000020E2572 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F8C80CCBD18h 0x0000000f lfence 0x00000012 mov edx, dword ptr [7FFE0014h] 0x00000018 lfence 0x0000001b ret 0x0000001c sub edx, esi 0x0000001e ret 0x0000001f test edx, 04934A48h 0x00000025 test cl, al 0x00000027 pop ecx 0x00000028 add edi, edx 0x0000002a dec ecx 0x0000002b cmp ecx, 00000000h 0x0000002e jne 00007F8C80CCBCF9h 0x00000030 push ecx 0x00000031 test ebx, ecx 0x00000033 call 00007F8C80CCBD31h 0x00000038 call 00007F8C80CCBD2Ah 0x0000003d lfence 0x00000040 mov edx, dword ptr [7FFE0014h] 0x00000046 lfence 0x00000049 ret 0x0000004a mov esi, edx 0x0000004c pushad 0x0000004d rdtsc
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E2104 rdtsc 0_2_020E2104
      Source: AWB20082020_pdf.exeBinary or memory string: am Files\Qemu-ga\qemu-ga.exe
      Source: AWB20082020_pdf.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E2104 rdtsc 0_2_020E2104
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E2221 mov eax, dword ptr fs:[00000030h]0_2_020E2221
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E243A mov eax, dword ptr fs:[00000030h]0_2_020E243A
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E1441 mov eax, dword ptr fs:[00000030h]0_2_020E1441
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E2722 mov eax, dword ptr fs:[00000030h]0_2_020E2722
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E098C mov eax, dword ptr fs:[00000030h]0_2_020E098C
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E0D86 mov eax, dword ptr fs:[00000030h]0_2_020E0D86
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeCode function: 0_2_020E27D1 mov eax, dword ptr fs:[00000030h]0_2_020E27D1
      Source: AWB20082020_pdf.exe, 00000000.00000002.481158113.0000000000C60000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: AWB20082020_pdf.exe, 00000000.00000002.481158113.0000000000C60000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: AWB20082020_pdf.exe, 00000000.00000002.481158113.0000000000C60000.00000002.00000001.sdmpBinary or memory string: Progmanlock
      Source: AWB20082020_pdf.exe, 00000000.00000002.481158113.0000000000C60000.00000002.00000001.sdmpBinary or memory string: Program Manager[
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeQueries volume information: C:\ VolumeInformationJump to behavior
      Source: C:\Users\user\Desktop\AWB20082020_pdf.exeQueries volume information: C:\ VolumeInformationJump to behavior

      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 Discovery111Remote 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.