Analysis Report cigar.exe

Overview

General Information

Sample Name: cigar.exe
Analysis ID: 356153
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

AV Detection:

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Multi AV Scanner detection for submitted file
Source: cigar.exe Virustotal: Detection: 22% Perma Link
Source: cigar.exe ReversingLabs: Detection: 17%

Compliance:

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Uses 32bit PE files
Source: cigar.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

System Summary:

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Potential malicious icon found
Source: initial sample Icon embedded in PE file: bad icon match: 20047c7c70f0e004
Abnormal high CPU Usage
Source: C:\Users\user\Desktop\cigar.exe Process Stats: CPU usage > 98%
PE file contains strange resources
Source: cigar.exe Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Sample file is different than original file name gathered from version info
Source: cigar.exe, 00000001.00000002.713260844.0000000002190000.00000002.00000001.sdmp Binary or memory string: OriginalFilenameuser32j% vs cigar.exe
Uses 32bit PE files
Source: cigar.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
Source: classification engine Classification label: mal84.rans.troj.evad.winEXE@1/0@0/0
Source: cigar.exe Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: C:\Users\user\Desktop\cigar.exe Section loaded: C:\Windows\SysWOW64\msvbvm60.dll Jump to behavior
Source: C:\Users\user\Desktop\cigar.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: cigar.exe Virustotal: Detection: 22%
Source: cigar.exe ReversingLabs: Detection: 17%

Data Obfuscation:

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Yara detected GuLoader
Source: Yara match File source: Process Memory Space: cigar.exe PID: 6472, type: MEMORY
Yara detected VB6 Downloader Generic
Source: Yara match File source: Process Memory Space: cigar.exe PID: 6472, type: MEMORY
Uses code obfuscation techniques (call, push, ret)
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_0040406A push ds; ret 1_2_00404078
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_00402E02 push ebx; ret 1_2_00402E03
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_0040642C push esi; retf 1_2_0040642D
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_004088B4 push ss; ret 1_2_004088D3
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_00406508 push esi; retf 1_2_00406509
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_00404B35 push esi; retf 1_2_00404B41
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_004065E8 push esi; retf 1_2_004065E9
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_00402D99 push ds; iretd 1_2_00402D9A
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B665BB push eax; ret 1_2_02B665BC
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B621B8 push edx; ret 1_2_02B621B9
Source: C:\Users\user\Desktop\cigar.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

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Contains functionality to detect hardware virtualization (CPUID execution measurement)
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B615E0 1_2_02B615E0
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B66D4F 1_2_02B66D4F
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65C68 second address: 0000000002B65B72 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 00007FFBD8B5037Ah 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 00007FFBD8B4FE36h 0x00000038 jmp 00007FFBD8B5037Ah 0x0000003a cmp ebx, ecx 0x0000003c push esi 0x0000003d push edx 0x0000003e push ecx 0x0000003f jmp 00007FFBD8B5037Eh 0x00000041 test ah, bh 0x00000043 jmp 00007FFBD8B5037Ah 0x00000045 test bh, dh 0x00000047 cmp eax, 00000539h 0x0000004c jne 00007FFBD8B503F6h 0x00000052 cmp dl, FFFFFF94h 0x00000055 test dl, dl 0x00000057 push 6DDB9555h 0x0000005c call 00007FFBD8B506C7h 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.exe RDTSC instruction interceptor: First address: 0000000002B65B72 second address: 0000000002B65B72 instructions:
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65C33 second address: 0000000002B65C33 instructions:
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65CD1 second address: 0000000002B65CD1 instructions:
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Source: cigar.exe Binary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXE
Tries to detect virtualization through RDTSC time measurements
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B6026A second address: 0000000002B60390 instructions: 0x00000000 rdtsc 0x00000002 popad 0x00000003 jmp 00007FFBD885622Eh 0x00000005 cmp bx, 6528h 0x0000000a mov ebp, esp 0x0000000c jmp 00007FFBD8856232h 0x0000000e test dl, bl 0x00000010 jmp 00007FFBD885622Ah 0x00000012 test cx, bx 0x00000015 jmp 00007FFBD885622Eh 0x00000017 push ecx 0x00000018 jmp 00007FFBD885625Bh 0x0000001a call 00007FFBD88561EAh 0x0000001f pop ecx 0x00000020 jmp ecx 0x00000022 pop ecx 0x00000023 call 00007FFBD8856215h 0x00000028 jmp 00007FFBD885622Eh 0x0000002a cmp ecx, ebx 0x0000002c jmp 00007FFBD8856232h 0x0000002e pushad 0x0000002f mov ecx, 000000FAh 0x00000034 rdtsc
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65C68 second address: 0000000002B65B72 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 00007FFBD8B5037Ah 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 00007FFBD8B4FE36h 0x00000038 jmp 00007FFBD8B5037Ah 0x0000003a cmp ebx, ecx 0x0000003c push esi 0x0000003d push edx 0x0000003e push ecx 0x0000003f jmp 00007FFBD8B5037Eh 0x00000041 test ah, bh 0x00000043 jmp 00007FFBD8B5037Ah 0x00000045 test bh, dh 0x00000047 cmp eax, 00000539h 0x0000004c jne 00007FFBD8B503F6h 0x00000052 cmp dl, FFFFFF94h 0x00000055 test dl, dl 0x00000057 push 6DDB9555h 0x0000005c call 00007FFBD8B506C7h 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.exe RDTSC instruction interceptor: First address: 0000000002B65B72 second address: 0000000002B65B72 instructions:
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65C33 second address: 0000000002B65C33 instructions:
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B65CD1 second address: 0000000002B65CD1 instructions:
Source: C:\Users\user\Desktop\cigar.exe RDTSC instruction interceptor: First address: 0000000002B633D9 second address: 0000000002B633D9 instructions: 0x00000000 rdtsc 0x00000002 xor eax, eax 0x00000004 inc eax 0x00000005 cpuid 0x00000007 popad 0x00000008 call 00007FFBD8B50389h 0x0000000d lfence 0x00000010 mov edx, dword ptr [7FFE0014h] 0x00000016 lfence 0x00000019 ret 0x0000001a sub edx, esi 0x0000001c ret 0x0000001d jmp 00007FFBD8B5037Ah 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 00007FFBD8B50328h 0x00000039 push ecx 0x0000003a call 00007FFBD8B503CEh 0x0000003f call 00007FFBD8B50399h 0x00000044 lfence 0x00000047 mov edx, dword ptr [7FFE0014h] 0x0000004d lfence 0x00000050 ret 0x00000051 mov esi, edx 0x00000053 pushad 0x00000054 rdtsc
Contains functionality for execution timing, often used to detect debuggers
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B65EAB rdtsc 1_2_02B65EAB
Source: cigar.exe Binary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

Anti Debugging:

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Contains functionality for execution timing, often used to detect debuggers
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B65EAB rdtsc 1_2_02B65EAB
Contains functionality to read the PEB
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B65B60 mov eax, dword ptr fs:[00000030h] 1_2_02B65B60
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B655BA mov eax, dword ptr fs:[00000030h] 1_2_02B655BA
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B631D4 mov eax, dword ptr fs:[00000030h] 1_2_02B631D4
Source: C:\Users\user\Desktop\cigar.exe Code function: 1_2_02B655D3 mov eax, dword ptr fs:[00000030h] 1_2_02B655D3
Source: cigar.exe, 00000001.00000002.713036208.0000000000C80000.00000002.00000001.sdmp Binary or memory string: Program Manager
Source: cigar.exe, 00000001.00000002.713036208.0000000000C80000.00000002.00000001.sdmp Binary or memory string: Shell_TrayWnd
Source: cigar.exe, 00000001.00000002.713036208.0000000000C80000.00000002.00000001.sdmp Binary or memory string: Progman
Source: cigar.exe, 00000001.00000002.713036208.0000000000C80000.00000002.00000001.sdmp Binary or memory string: Progmanlock
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 356153 Sample: cigar.exe Startdate: 22/02/2021 Architecture: WINDOWS Score: 84 8 Potential malicious icon found 2->8 10 Multi AV Scanner detection for submitted file 2->10 12 Yara detected GuLoader 2->12 14 2 other signatures 2->14 5 cigar.exe 2->5         started        process3 signatures4 16 Contains functionality to detect hardware virtualization (CPUID execution measurement) 5->16 18 Detected RDTSC dummy instruction sequence (likely for instruction hammering) 5->18 20 Tries to detect virtualization through RDTSC time measurements 5->20
No contacted IP infos