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Analysis Report wheatstag.png.exe

Overview

General Information

Sample Name:wheatstag.png.exe
Analysis ID:284012
MD5:717bc63d6121cfa36b2b8123ecccc686
SHA1:9d50e9c4e7953570aab0d7f6e5daef85ce7cb747
SHA256:c406f350618ef9ed643059f1a264ddf8e111fdf8ab23f64ba0b6a409d02a4ac7

Most interesting Screenshot:

Detection

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

Signatures

Multi AV Scanner detection for submitted file
Potential malicious icon found
Yara detected GuLoader
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
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
Found inlined nop instructions (likely shell or obfuscated code)
PE file contains an invalid checksum
PE file contains strange resources
Sample file is different than original file name gathered from version info
Uses code obfuscation techniques (call, push, ret)

Classification

Startup

  • System is w10x64
  • wheatstag.png.exe (PID: 7076 cmdline: 'C:\Users\user\Desktop\wheatstag.png.exe' MD5: 717BC63D6121CFA36B2B8123ECCCC686)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: wheatstag.png.exe PID: 7076JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: wheatstag.png.exe PID: 7076JoeSecurity_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: wheatstag.png.exeVirustotal: Detection: 14%Perma Link
      Source: wheatstag.png.exeReversingLabs: Detection: 18%
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 4x nop then wait 1_2_00402CAD
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 4x nop then wait 1_2_00402CF7

      System Summary:

      barindex
      Potential malicious icon foundShow sources
      Source: initial sampleIcon embedded in PE file: bad icon match: 20047c7c70f0e004
      Source: C:\Users\user\Desktop\wheatstag.png.exeProcess Stats: CPU usage > 98%
      Source: wheatstag.png.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: wheatstag.png.exe, 00000001.00000002.452465953.0000000002150000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs wheatstag.png.exe
      Source: wheatstag.png.exe, 00000001.00000000.185599115.000000000040F000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameHeartbr5.exe vs wheatstag.png.exe
      Source: wheatstag.png.exeBinary or memory string: OriginalFilenameHeartbr5.exe vs wheatstag.png.exe
      Source: classification engineClassification label: mal80.rans.troj.evad.winEXE@1/0@0/0
      Source: wheatstag.png.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\wheatstag.png.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\wheatstag.png.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
      Source: wheatstag.png.exeVirustotal: Detection: 14%
      Source: wheatstag.png.exeReversingLabs: Detection: 18%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: wheatstag.png.exe PID: 7076, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: wheatstag.png.exe PID: 7076, type: MEMORY
      Source: wheatstag.png.exeStatic PE information: real checksum: 0x14040 should be: 0x10b86
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_00401C5C push ecx; iretd 1_2_00401C5D
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_00405A5E pushfd ; ret 1_2_00405A6A
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_00405A71 pushfd ; ret 1_2_00405A6A
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_00402A29 push 0000007Bh; iretd 1_2_00402A2F
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_00401EAB push es; iretd 1_2_00401EAE
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_004012B6 pushad ; iretd 1_2_004012E1
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E003A push edi; ret 1_2_021E0059
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E3111 push ebp; ret 1_2_021E3125
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E3126 push ebp; ret 1_2_021E3125
      Source: initial sampleStatic PE information: section name: .text entropy: 6.86833025517

      Hooking and other Techniques for Hiding and Protection:

      barindex
      Uses an obfuscated file name to hide its real file extension (double extension)Show sources
      Source: Possible double extension: png.exeStatic PE information: wheatstag.png.exe
      Source: C:\Users\user\Desktop\wheatstag.png.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: wheatstag.png.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\wheatstag.png.exeRDTSC instruction interceptor: First address: 00000000021E3963 second address: 00000000021E3963 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F57E8A055F8h 0x0000000f lfence 0x00000012 mov edx, dword ptr [7FFE0014h] 0x00000018 lfence 0x0000001b ret 0x0000001c sub edx, esi 0x0000001e ret 0x0000001f cmp ax, cx 0x00000022 pop ecx 0x00000023 cmp bh, bh 0x00000025 add edi, edx 0x00000027 test dl, 0000005Eh 0x0000002a dec ecx 0x0000002b cmp ecx, 00000000h 0x0000002e jne 00007F57E8A055DBh 0x00000030 push ecx 0x00000031 call 00007F57E8A0566Eh 0x00000036 call 00007F57E8A0560Ah 0x0000003b lfence 0x0000003e mov edx, dword ptr [7FFE0014h] 0x00000044 lfence 0x00000047 ret 0x00000048 mov esi, edx 0x0000004a pushad 0x0000004b rdtsc
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E1A0E rdtsc 1_2_021E1A0E
      Source: wheatstag.png.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E1A0E rdtsc 1_2_021E1A0E
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E3C95 mov eax, dword ptr fs:[00000030h]1_2_021E3C95
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E34F5 mov eax, dword ptr fs:[00000030h]1_2_021E34F5
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E1F15 mov eax, dword ptr fs:[00000030h]1_2_021E1F15
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E1554 mov eax, dword ptr fs:[00000030h]1_2_021E1554
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E0F49 mov eax, dword ptr fs:[00000030h]1_2_021E0F49
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E1379 mov eax, dword ptr fs:[00000030h]1_2_021E1379
      Source: C:\Users\user\Desktop\wheatstag.png.exeCode function: 1_2_021E37A4 mov eax, dword ptr fs:[00000030h]1_2_021E37A4
      Source: wheatstag.png.exe, 00000001.00000002.451523176.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Program Manager
      Source: wheatstag.png.exe, 00000001.00000002.451523176.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: wheatstag.png.exe, 00000001.00000002.451523176.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: wheatstag.png.exe, 00000001.00000002.451523176.0000000000C40000.00000002.00000001.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 Injection1Masquerading1OS 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 ScriptsSoftware Packing1LSASS 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)Process Injection1Security Account ManagerSystem Information Discovery11SMB/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)Obfuscated Files or Information13NTDSSystem Network Configuration DiscoveryDistributed 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.