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Analysis Report cigar.exe

Overview

General Information

Sample Name:cigar.exe
Analysis ID:356160
MD5:57261d6b5337c8d9f838617f2efd6c19
SHA1:9f2855adb0a71a6079bcbe73438e1212b51f0bed
SHA256:ee41c208f648cc461bf54a5d9e40040a25e51ebde8e9721937ca152d964bb10f

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
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
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
  • cigar.exe (PID: 1088 cmdline: 'C:\Users\user\Desktop\cigar.exe' MD5: 57261D6B5337C8D9F838617F2EFD6C19)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: cigar.exe PID: 1088JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: cigar.exe PID: 1088JoeSecurity_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: cigar.exeVirustotal: Detection: 22%Perma Link
      Source: cigar.exeReversingLabs: Detection: 17%

      Compliance:

      barindex
      Uses 32bit PE filesShow sources
      Source: cigar.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
      Source: C:\Users\user\Desktop\cigar.exeProcess Stats: CPU usage > 98%
      Source: cigar.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: cigar.exe, 00000001.00000002.1158750477.00000000021E0000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs cigar.exe
      Source: cigar.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: cigar.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\cigar.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\cigar.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
      Source: cigar.exeVirustotal: Detection: 22%
      Source: cigar.exeReversingLabs: Detection: 17%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: cigar.exe PID: 1088, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: cigar.exe PID: 1088, type: MEMORY
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_0040406A push ds; ret 1_2_00404078
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_00402E02 push ebx; ret 1_2_00402E03
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_0040642C push esi; retf 1_2_0040642D
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_004088B4 push ss; ret 1_2_004088D3
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_00406508 push esi; retf 1_2_00406509
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_00404B35 push esi; retf 1_2_00404B41
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_004065E8 push esi; retf 1_2_004065E9
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_00402D99 push ds; iretd 1_2_00402D9A
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022365BB push eax; ret 1_2_022365BC
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022321B8 push edx; ret 1_2_022321B9
      Source: C:\Users\user\Desktop\cigar.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Contains functionality to detect hardware virtualization (CPUID execution measurement)Show sources
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_02236D4F 1_2_02236D4F
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022315E0 1_2_022315E0
      Detected RDTSC dummy instruction sequence (likely for instruction hammering)Show sources
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235C68 second address: 0000000002235B72 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a test bx, dx 0x0000000d cmp edx, ebx 0x0000000f cmp ah, FFFFFFF3h 0x00000012 test esi, BEA9A6B7h 0x00000018 jmp 00007F9F5087B95Ah 0x0000001a test bh, 00000010h 0x0000001d cmp ch, 00000030h 0x00000020 mov eax, 00000539h 0x00000025 test cx, ax 0x00000028 mov ecx, dword ptr [ebp+1Ch] 0x0000002b test cx, cx 0x0000002e mov edx, 8802EDACh 0x00000033 call 00007F9F5087B416h 0x00000038 jmp 00007F9F5087B95Ah 0x0000003a cmp ebx, ecx 0x0000003c push esi 0x0000003d push edx 0x0000003e push ecx 0x0000003f jmp 00007F9F5087B95Eh 0x00000041 test ah, bh 0x00000043 jmp 00007F9F5087B95Ah 0x00000045 test bh, dh 0x00000047 cmp eax, 00000539h 0x0000004c jne 00007F9F5087B9D6h 0x00000052 cmp dl, FFFFFF94h 0x00000055 test dl, dl 0x00000057 push 6DDB9555h 0x0000005c call 00007F9F5087BCA7h 0x00000061 mov eax, dword ptr fs:[00000030h] 0x00000067 cmp ch, bh 0x00000069 mov eax, dword ptr [eax+0Ch] 0x0000006c test dx, cx 0x0000006f mov eax, dword ptr [eax+14h] 0x00000072 pushad 0x00000073 rdtsc
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235B72 second address: 0000000002235B72 instructions:
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235C33 second address: 0000000002235C33 instructions:
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235CD1 second address: 0000000002235CD1 instructions:
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: cigar.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\cigar.exeRDTSC instruction interceptor: First address: 000000000223026A second address: 0000000002230390 instructions: 0x00000000 rdtsc 0x00000002 popad 0x00000003 jmp 00007F9F50FF8EBEh 0x00000005 cmp bx, 6528h 0x0000000a mov ebp, esp 0x0000000c jmp 00007F9F50FF8EC2h 0x0000000e test dl, bl 0x00000010 jmp 00007F9F50FF8EBAh 0x00000012 test cx, bx 0x00000015 jmp 00007F9F50FF8EBEh 0x00000017 push ecx 0x00000018 jmp 00007F9F50FF8EEBh 0x0000001a call 00007F9F50FF8E7Ah 0x0000001f pop ecx 0x00000020 jmp ecx 0x00000022 pop ecx 0x00000023 call 00007F9F50FF8EA5h 0x00000028 jmp 00007F9F50FF8EBEh 0x0000002a cmp ecx, ebx 0x0000002c jmp 00007F9F50FF8EC2h 0x0000002e pushad 0x0000002f mov ecx, 000000FAh 0x00000034 rdtsc
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235C68 second address: 0000000002235B72 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a test bx, dx 0x0000000d cmp edx, ebx 0x0000000f cmp ah, FFFFFFF3h 0x00000012 test esi, BEA9A6B7h 0x00000018 jmp 00007F9F5087B95Ah 0x0000001a test bh, 00000010h 0x0000001d cmp ch, 00000030h 0x00000020 mov eax, 00000539h 0x00000025 test cx, ax 0x00000028 mov ecx, dword ptr [ebp+1Ch] 0x0000002b test cx, cx 0x0000002e mov edx, 8802EDACh 0x00000033 call 00007F9F5087B416h 0x00000038 jmp 00007F9F5087B95Ah 0x0000003a cmp ebx, ecx 0x0000003c push esi 0x0000003d push edx 0x0000003e push ecx 0x0000003f jmp 00007F9F5087B95Eh 0x00000041 test ah, bh 0x00000043 jmp 00007F9F5087B95Ah 0x00000045 test bh, dh 0x00000047 cmp eax, 00000539h 0x0000004c jne 00007F9F5087B9D6h 0x00000052 cmp dl, FFFFFF94h 0x00000055 test dl, dl 0x00000057 push 6DDB9555h 0x0000005c call 00007F9F5087BCA7h 0x00000061 mov eax, dword ptr fs:[00000030h] 0x00000067 cmp ch, bh 0x00000069 mov eax, dword ptr [eax+0Ch] 0x0000006c test dx, cx 0x0000006f mov eax, dword ptr [eax+14h] 0x00000072 pushad 0x00000073 rdtsc
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235B72 second address: 0000000002235B72 instructions:
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235C33 second address: 0000000002235C33 instructions:
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 0000000002235CD1 second address: 0000000002235CD1 instructions:
      Source: C:\Users\user\Desktop\cigar.exeRDTSC instruction interceptor: First address: 00000000022333D9 second address: 00000000022333D9 instructions: 0x00000000 rdtsc 0x00000002 xor eax, eax 0x00000004 inc eax 0x00000005 cpuid 0x00000007 popad 0x00000008 call 00007F9F5087B969h 0x0000000d lfence 0x00000010 mov edx, dword ptr [7FFE0014h] 0x00000016 lfence 0x00000019 ret 0x0000001a sub edx, esi 0x0000001c ret 0x0000001d jmp 00007F9F5087B95Ah 0x0000001f test cx, ax 0x00000022 test dx, cx 0x00000025 pop ecx 0x00000026 add edi, edx 0x00000028 cmp cx, 2037h 0x0000002d dec ecx 0x0000002e cmp ecx, E1F4F254h 0x00000034 cmp ecx, 00000000h 0x00000037 jne 00007F9F5087B908h 0x00000039 push ecx 0x0000003a call 00007F9F5087B9AEh 0x0000003f call 00007F9F5087B979h 0x00000044 lfence 0x00000047 mov edx, dword ptr [7FFE0014h] 0x0000004d lfence 0x00000050 ret 0x00000051 mov esi, edx 0x00000053 pushad 0x00000054 rdtsc
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_02236E30 rdtsc 1_2_02236E30
      Source: cigar.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_02236E30 rdtsc 1_2_02236E30
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_02235B60 mov eax, dword ptr fs:[00000030h]1_2_02235B60
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022355BA mov eax, dword ptr fs:[00000030h]1_2_022355BA
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022355D3 mov eax, dword ptr fs:[00000030h]1_2_022355D3
      Source: C:\Users\user\Desktop\cigar.exeCode function: 1_2_022331D4 mov eax, dword ptr fs:[00000030h]1_2_022331D4
      Source: cigar.exe, 00000001.00000002.1158697638.0000000000D90000.00000002.00000001.sdmpBinary or memory string: Program Manager
      Source: cigar.exe, 00000001.00000002.1158697638.0000000000D90000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: cigar.exe, 00000001.00000002.1158697638.0000000000D90000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: cigar.exe, 00000001.00000002.1158697638.0000000000D90000.00000002.00000001.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 Discovery411Remote 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 Discovery31SMB/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.