Analysis Report SecuriteInfo.com.Trojan.VbCrypt.1981.29338.509

Overview

General Information

Sample Name: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.509 (renamed file extension from 509 to exe)
Analysis ID: 345046
MD5: 41e225be0600a7efd31ca3206f97ec17
SHA1: 260d739ff434f90daad6c2c724fc9333348e9007
SHA256: 50851ce50dcc51f9c8111e3071ee9b041181cd462cd263b38f28f51dbc79c38a
Tags: GuLoader

Most interesting Screenshot:

Detection

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

Signatures

Yara detected GuLoader
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Found potential dummy code loops (likely to delay analysis)
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 call native functions
Contains functionality to read the PEB
PE / OLE file has an invalid certificate
PE file contains strange resources
Program does not show much activity (idle)
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)

Classification

Compliance:

barindex
Uses 32bit PE files
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

System Summary:

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Abnormal high CPU Usage
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process Stats: CPU usage > 98%
Contains functionality to call native functions
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_021652CD NtProtectVirtualMemory, 0_2_021652CD
PE / OLE file has an invalid certificate
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Static PE information: invalid certificate
PE file contains strange resources
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.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: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000000.215584204.000000000042A000.00000002.00020000.sdmp Binary or memory string: OriginalFilenameGAUFFERED.exe vs SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000002.1264699702.0000000002920000.00000004.00000001.sdmp Binary or memory string: OriginalFilenameGAUFFERED.exeFE2X vs SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Binary or memory string: OriginalFilenameGAUFFERED.exe vs SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe
Uses 32bit PE files
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
Source: classification engine Classification label: mal68.troj.evad.winEXE@1/0@0/0
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe File created: C:\Users\user\AppData\Local\Temp\~DFB69A9690CED0DFA8.TMP Jump to behavior
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Section loaded: C:\Windows\SysWOW64\msvbvm60.dll Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior

Data Obfuscation:

barindex
Yara detected GuLoader
Source: Yara match File source: Process Memory Space: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe PID: 1364, type: MEMORY
Yara detected VB6 Downloader Generic
Source: Yara match File source: Process Memory Space: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe PID: 1364, type: MEMORY
Uses code obfuscation techniques (call, push, ret)
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_00409C58 push es; ret 0_2_00409C59
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_004011E8 push eax; retf 0041h 0_2_004011E9
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02163590 pushad ; ret 0_2_02163591
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

barindex
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe RDTSC instruction interceptor: First address: 000000000216034D second address: 00000000021646A1 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a add esp, 24h 0x0000000d call 00007FF55499F737h 0x00000012 test eax, E833E129h 0x00000017 call 00007FF55499B628h 0x0000001c jmp 00007FF55499B56Ah 0x0000001e cmp bl, bl 0x00000020 xor edi, edi 0x00000022 mov dword ptr [ebp+000000F8h], 00A95F60h 0x0000002c call 00007FF55499B563h 0x00000031 call 00007FF55499B558h 0x00000036 lfence 0x00000039 mov edx, dword ptr [7FFE0014h] 0x0000003f lfence 0x00000042 ret 0x00000043 mov esi, edx 0x00000045 pushad 0x00000046 rdtsc
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.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\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe RDTSC instruction interceptor: First address: 000000000216034D second address: 00000000021646A1 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a add esp, 24h 0x0000000d call 00007FF55499F737h 0x00000012 test eax, E833E129h 0x00000017 call 00007FF55499B628h 0x0000001c jmp 00007FF55499B56Ah 0x0000001e cmp bl, bl 0x00000020 xor edi, edi 0x00000022 mov dword ptr [ebp+000000F8h], 00A95F60h 0x0000002c call 00007FF55499B563h 0x00000031 call 00007FF55499B558h 0x00000036 lfence 0x00000039 mov edx, dword ptr [7FFE0014h] 0x0000003f lfence 0x00000042 ret 0x00000043 mov esi, edx 0x00000045 pushad 0x00000046 rdtsc
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe RDTSC instruction interceptor: First address: 00000000021646A1 second address: 00000000021646A1 instructions: 0x00000000 rdtsc 0x00000002 xor eax, eax 0x00000004 inc eax 0x00000005 cpuid 0x00000007 popad 0x00000008 call 00007FF5549997F8h 0x0000000d lfence 0x00000010 mov edx, dword ptr [7FFE0014h] 0x00000016 lfence 0x00000019 ret 0x0000001a sub edx, esi 0x0000001c ret 0x0000001d cmp cl, al 0x0000001f add edi, edx 0x00000021 cmp ch, ch 0x00000023 dec dword ptr [ebp+000000F8h] 0x00000029 cmp dword ptr [ebp+000000F8h], 00000000h 0x00000030 jne 00007FF5549997D8h 0x00000032 call 00007FF554999813h 0x00000037 call 00007FF554999808h 0x0000003c lfence 0x0000003f mov edx, dword ptr [7FFE0014h] 0x00000045 lfence 0x00000048 ret 0x00000049 mov esi, edx 0x0000004b pushad 0x0000004c rdtsc
Contains functionality for execution timing, often used to detect debuggers
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_0216140F rdtsc 0_2_0216140F
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Binary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

Anti Debugging:

barindex
Found potential dummy code loops (likely to delay analysis)
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Process Stats: CPU usage > 90% for more than 60s
Contains functionality for execution timing, often used to detect debuggers
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_0216140F rdtsc 0_2_0216140F
Contains functionality to read the PEB
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02164454 mov eax, dword ptr fs:[00000030h] 0_2_02164454
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02164479 mov eax, dword ptr fs:[00000030h] 0_2_02164479
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02161A6B mov eax, dword ptr fs:[00000030h] 0_2_02161A6B
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_021618AE mov eax, dword ptr fs:[00000030h] 0_2_021618AE
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_021618AC mov eax, dword ptr fs:[00000030h] 0_2_021618AC
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_021644DD mov eax, dword ptr fs:[00000030h] 0_2_021644DD
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02162522 mov eax, dword ptr fs:[00000030h] 0_2_02162522
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02164B2B mov eax, dword ptr fs:[00000030h] 0_2_02164B2B
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02164B75 mov eax, dword ptr fs:[00000030h] 0_2_02164B75
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02163BE6 mov eax, dword ptr fs:[00000030h] 0_2_02163BE6
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_02164BE5 mov eax, dword ptr fs:[00000030h] 0_2_02164BE5
Source: C:\Users\user\Desktop\SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe Code function: 0_2_021613EC mov eax, dword ptr fs:[00000030h] 0_2_021613EC
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000002.1263709010.0000000000C50000.00000002.00000001.sdmp Binary or memory string: Program Manager
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000002.1263709010.0000000000C50000.00000002.00000001.sdmp Binary or memory string: Shell_TrayWnd
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000002.1263709010.0000000000C50000.00000002.00000001.sdmp Binary or memory string: Progman
Source: SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe, 00000000.00000002.1263709010.0000000000C50000.00000002.00000001.sdmp Binary or memory string: Progmanlock
windows-stand
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: 345046 Sample: SecuriteInfo.com.Trojan.VbC... Startdate: 27/01/2021 Architecture: WINDOWS Score: 68 8 Yara detected GuLoader 2->8 10 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->10 12 Yara detected VB6 Downloader Generic 2->12 5 SecuriteInfo.com.Trojan.VbCrypt.1981.29338.exe 1 2->5         started        process3 signatures4 14 Detected RDTSC dummy instruction sequence (likely for instruction hammering) 5->14 16 Found potential dummy code loops (likely to delay analysis) 5->16 18 Tries to detect virtualization through RDTSC time measurements 5->18
No contacted IP infos