Windows Analysis Report
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.8895

Overview

General Information

Sample Name: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.8895 (renamed file extension from 8895 to exe)
Analysis ID: 626513
MD5: 6f790a9e28d73d498c89a19cfe941d1b
SHA1: 1ec63e32364359f656b29eb37e3a2af11ecc62a8
SHA256: 2241716c3ddff7b1f771a6e3c91b67ded01e9f78026ecc124863099dbe5ac405
Tags: exe
Infos:

Detection

GuLoader
Score: 88
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Antivirus detection for URL or domain
Yara detected GuLoader
Tries to detect virtualization through RDTSC time measurements
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
PE file contains strange resources
Drops PE files
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
PE / OLE file has an invalid certificate
Contains functionality to dynamically determine API calls
Abnormal high CPU Usage
Contains functionality for read data from the clipboard

Classification

AV Detection
barindex
Found malware configuration
Source: 00000000.00000002.784638235.0000000003221000.00000040.00001000.00020000.00000000.sdmp Malware Configuration Extractor: GuLoader {"Payload URL": "http://185.236.228.217/private/Spread.bin"}
Multi AV Scanner detection for submitted file
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Virustotal: Detection: 7% Perma Link
Antivirus detection for URL or domain
Source: http://185.236.228.217/private/Spread.bin Avira URL Cloud: Label: malware
Uses 32bit PE files
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: NO_SEH, TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00405D74 CloseHandle,GetTempPathW,DeleteFileW,lstrcatW,lstrcatW,lstrlenW,FindFirstFileW,FindNextFileW,FindClose, 0_2_00405D74
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_0040699E FindFirstFileW,FindClose, 0_2_0040699E
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_0040290B FindFirstFileW, 0_2_0040290B

Networking
barindex
C2 URLs / IPs found in malware configuration
Source: Malware configuration extractor URLs: http://185.236.228.217/private/Spread.bin
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://aia.mesince.com/ms-tsa.cer02
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://aia.mesince.com/ms.cer0
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://crl.mesince.com/ms-tsa.crl0F
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://crl.mesince.com/ms.crl0
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://nsis.sf.net/NSIS_ErrorError
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://ocsp.mesince.com0)
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://ocsp.mesince.com0-
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe String found in binary or memory: http://www.mesince.com/policy/0
Contains functionality for read data from the clipboard
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00405809 GetDlgItem,GetDlgItem,GetDlgItem,GetDlgItem,GetClientRect,GetSystemMetrics,SendMessageW,SendMessageW,SendMessageW,SendMessageW,SendMessageW,SendMessageW,ShowWindow,ShowWindow,GetDlgItem,SendMessageW,SendMessageW,SendMessageW,GetDlgItem,CreateThread,FindCloseChangeNotification,ShowWindow,ShowWindow,ShowWindow,ShowWindow,SendMessageW,CreatePopupMenu,AppendMenuW,GetWindowRect,TrackPopupMenu,SendMessageW,OpenClipboard,EmptyClipboard,GlobalAlloc,GlobalLock,SendMessageW,GlobalUnlock,SetClipboardData,CloseClipboard, 0_2_00405809
Uses 32bit PE files
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
PE file contains strange resources
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Contains functionality to shutdown / reboot the system
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00403640 EntryPoint,SetErrorMode,GetVersionExW,GetVersionExW,GetVersionExW,lstrlenA,#17,OleInitialize,SHGetFileInfoW,GetCommandLineW,CharNextW,GetTempPathW,GetTempPathW,GetWindowsDirectoryW,lstrcatW,GetTempPathW,lstrcatW,SetEnvironmentVariableW,SetEnvironmentVariableW,SetEnvironmentVariableW,DeleteFileW,lstrcatW,lstrcatW,lstrcatW,lstrcmpiW,SetCurrentDirectoryW,DeleteFileW,CopyFileW,CloseHandle,OleUninitialize,ExitProcess,GetCurrentProcess,OpenProcessToken,LookupPrivilegeValueW,AdjustTokenPrivileges,ExitWindowsEx,ExitProcess, 0_2_00403640
Detected potential crypto function
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00406D5F 0_2_00406D5F
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_6FD61BFF 0_2_6FD61BFF
PE / OLE file has an invalid certificate
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: invalid certificate
Abnormal high CPU Usage
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Process Stats: CPU usage > 98%
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Virustotal: Detection: 7%
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe File read: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Jump to behavior
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.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.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f486a52-3cb1-48fd-8f50-b8dc300d9f9d}\InProcServer32 Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00403640 EntryPoint,SetErrorMode,GetVersionExW,GetVersionExW,GetVersionExW,lstrlenA,#17,OleInitialize,SHGetFileInfoW,GetCommandLineW,CharNextW,GetTempPathW,GetTempPathW,GetWindowsDirectoryW,lstrcatW,GetTempPathW,lstrcatW,SetEnvironmentVariableW,SetEnvironmentVariableW,SetEnvironmentVariableW,DeleteFileW,lstrcatW,lstrcatW,lstrcatW,lstrcmpiW,SetCurrentDirectoryW,DeleteFileW,CopyFileW,CloseHandle,OleUninitialize,ExitProcess,GetCurrentProcess,OpenProcessToken,LookupPrivilegeValueW,AdjustTokenPrivileges,ExitWindowsEx,ExitProcess, 0_2_00403640
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe File created: C:\Users\user\AppData\Local\Temp\nst5193.tmp Jump to behavior
Source: classification engine Classification label: mal88.troj.evad.winEXE@1/2@0/0
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_004021AA CoCreateInstance, 0_2_004021AA
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe File read: C:\Users\desktop.ini Jump to behavior
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00404AB5 GetDlgItem,SetWindowTextW,SHBrowseForFolderW,CoTaskMemFree,lstrcmpiW,lstrcatW,SetDlgItemTextW,GetDiskFreeSpaceW,MulDiv,SetDlgItemTextW, 0_2_00404AB5
Source: SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Static PE information: NO_SEH, TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT

Data Obfuscation
barindex
Yara detected GuLoader
Source: Yara match File source: 00000000.00000002.784638235.0000000003221000.00000040.00001000.00020000.00000000.sdmp, type: MEMORY
Uses code obfuscation techniques (call, push, ret)
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_6FD630C0 push eax; ret 0_2_6FD630EE
Contains functionality to dynamically determine API calls
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_6FD61BFF GlobalAlloc,lstrcpyW,lstrcpyW,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,lstrcpyW,GetModuleHandleW,LoadLibraryW,GetProcAddress,lstrlenW, 0_2_6FD61BFF
Drops PE files
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe File created: C:\Users\user\AppData\Local\Temp\nsj528F.tmp\System.dll Jump to dropped file

Hooking and other Techniques for Hiding and Protection
barindex
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Source: initial sample Icon embedded in binary file: icon matches a legit application icon: download (31).png
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion
barindex
Tries to detect virtualization through RDTSC time measurements
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe RDTSC instruction interceptor: First address: 00000000032226BD second address: 00000000032226BD instructions: 0x00000000 rdtsc 0x00000002 jmp 00007FE38CD9CE86h 0x00000004 cmp ecx, D929F3C8h 0x0000000a cmp ebx, ecx 0x0000000c jc 00007FE38CD9CE31h 0x0000000e jmp 00007FE38CD9CE8Ah 0x00000010 test cx, bx 0x00000013 inc ebp 0x00000014 inc ebx 0x00000015 rdtsc
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00405D74 CloseHandle,GetTempPathW,DeleteFileW,lstrcatW,lstrcatW,lstrlenW,FindFirstFileW,FindNextFileW,FindClose, 0_2_00405D74
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_0040699E FindFirstFileW,FindClose, 0_2_0040699E
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_0040290B FindFirstFileW, 0_2_0040290B
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe API call chain: ExitProcess graph end node
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe API call chain: ExitProcess graph end node
Contains functionality to dynamically determine API calls
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_6FD61BFF GlobalAlloc,lstrcpyW,lstrcpyW,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,lstrcpyW,GetModuleHandleW,LoadLibraryW,GetProcAddress,lstrlenW, 0_2_6FD61BFF
Source: C:\Users\user\Desktop\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe Code function: 0_2_00403640 EntryPoint,SetErrorMode,GetVersionExW,GetVersionExW,GetVersionExW,lstrlenA,#17,OleInitialize,SHGetFileInfoW,GetCommandLineW,CharNextW,GetTempPathW,GetTempPathW,GetWindowsDirectoryW,lstrcatW,GetTempPathW,lstrcatW,SetEnvironmentVariableW,SetEnvironmentVariableW,SetEnvironmentVariableW,DeleteFileW,lstrcatW,lstrcatW,lstrcatW,lstrcmpiW,SetCurrentDirectoryW,DeleteFileW,CopyFileW,CloseHandle,OleUninitialize,ExitProcess,GetCurrentProcess,OpenProcessToken,LookupPrivilegeValueW,AdjustTokenPrivileges,ExitWindowsEx,ExitProcess, 0_2_00403640
windows-stand
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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: 626513 Sample: SecuriteInfo.com.UDS.Trojan... Startdate: 14/05/2022 Architecture: WINDOWS Score: 88 11 Found malware configuration 2->11 13 Antivirus detection for URL or domain 2->13 15 Icon mismatch, binary includes an icon from a different legit application in order to fool users 2->15 17 3 other signatures 2->17 5 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.17738.exe 19 2->5         started        process3 file4 9 C:\Users\user\AppData\Local\...\System.dll, PE32 5->9 dropped 19 Tries to detect virtualization through RDTSC time measurements 5->19 signatures5
⊘No contacted IP infos

Contacted URLs

Name Malicious Antivirus Detection Reputation
http://185.236.228.217/private/Spread.bin true
  • Avira URL Cloud: malware
 unknown