Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
file.exe

Overview

General Information

Sample name:file.exe
Analysis ID:1565520
MD5:bb0c42d0421512d8f7796f5253543456
SHA1:8b3139e22e253adc3b55d8743a7d4cc173aa567d
SHA256:29ca807f5372fed46f73a09b357be9a41c7271307d273a20fe9045eeadce65e8
Tags:exeuser-Bitsight
Infos:

Detection

Stealc
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Antivirus / Scanner detection for submitted sample
Detected unpacking (changes PE section rights)
Found malware configuration
Suricata IDS alerts for network traffic
Yara detected Powershell download and execute
Yara detected Stealc
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after checking locale)
Hides threads from debuggers
Machine Learning detection for sample
PE file contains section with special chars
Searches for specific processes (likely to inject)
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to detect virtualization through RDTSC time measurements
Tries to evade debugger and weak emulator (self modifying code)
Checks for debuggers (devices)
Checks if the current process is being debugged
Contains capabilities to detect virtual machines
Contains functionality to create guard pages, often used to hinder reverse engineering and debugging
Contains functionality to dynamically determine API calls
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Detected potential crypto function
Entry point lies outside standard sections
Extensive use of GetProcAddress (often used to hide API calls)
Found evaded block containing many API calls
Found evasive API chain (date check)
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
PE file contains an invalid checksum
PE file contains sections with non-standard names
Program does not show much activity (idle)
Queries the volume information (name, serial number etc) of a device
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)

Classification

Process Tree

  • System is w10x64
  • file.exe (PID: 5436 cmdline: "C:\Users\user\Desktop\file.exe" MD5: BB0C42D0421512D8F7796F5253543456)
  • cleanup

Malware Threat Intel

Provided by

NameDescriptionAttributionBlogpost URLsLink
StealcStealc is an information stealer advertised by its presumed developer Plymouth on Russian-speaking underground forums and sold as a Malware-as-a-Service since January 9, 2023. According to Plymouth's statement, stealc is a non-resident stealer with flexible data collection settings and its development is relied on other prominent stealers: Vidar, Raccoon, Mars and Redline.Stealc is written in C and uses WinAPI functions. It mainly targets date from web browsers, extensions and Desktop application of cryptocurrency wallets, and from other applications (messengers, email clients, etc.). The malware downloads 7 legitimate third-party DLLs to collect sensitive data from web browsers, including sqlite3.dll, nss3.dll, vcruntime140.dll, mozglue.dll, freebl3.dll, softokn3.dll and msvcp140.dll. It then exfiltrates the collected information file by file to its C2 server using HTTP POST requests.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/win.stealc

Malware Configuration

Threatname: StealC

{"C2 url": "http://185.215.113.206/c4becf79229cb002.php", "Botnet": "drum"}

Yara Signatures

PCAP (Network Traffic)

SourceRuleDescriptionAuthorStrings
dump.pcapJoeSecurity_Stealc_1Yara detected StealcJoe Security

    Memory Dumps

    SourceRuleDescriptionAuthorStrings
    00000000.00000002.2080969358.0000000000121000.00000040.00000001.01000000.00000003.sdmpJoeSecurity_StealcYara detected StealcJoe Security
      00000000.00000002.2081679058.00000000013DE000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_StealcYara detected StealcJoe Security
        00000000.00000003.2040747804.00000000052A0000.00000004.00001000.00020000.00000000.sdmpJoeSecurity_StealcYara detected StealcJoe Security
          Process Memory Space: file.exe PID: 5436JoeSecurity_PowershellDownloadAndExecuteYara detected Powershell download and executeJoe Security
            Process Memory Space: file.exe PID: 5436JoeSecurity_StealcYara detected StealcJoe Security

              Sigma Signatures

              ⊘No Sigma rule has matched

              Suricata Signatures

              TimestampSIDSeverityClasstypeSource IPSource PortDestination IPDestination PortProtocol
              2024-11-30T04:12:02.565183+010020442431Malware Command and Control Activity Detected192.168.2.549704185.215.113.20680TCP

              Joe Sandbox Signatures

              Click to jump to signature section

              Show All Signature Results

              AV Detection

              barindex
              Antivirus / Scanner detection for submitted sample
              Source: file.exeAvira: detected
              Found malware configuration
              Source: file.exe.5436.0.memstrminMalware Configuration Extractor: StealC {"C2 url": "http://185.215.113.206/c4becf79229cb002.php", "Botnet": "drum"}
              AI detected suspicious sample
              Source: Submited SampleIntegrated Neural Analysis Model: Matched 100.0% probability
              Machine Learning detection for sample
              Source: file.exeJoe Sandbox ML: detected
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00124C50 lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,InternetOpenA,StrCmpCA,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,InternetConnectA,HttpOpenRequestA,lstrcpy,lstrlen,lstrlen,HttpSendRequestA,InternetReadFile,lstrlen,lstrcpy,lstrcat,lstrcpy,InternetReadFile,InternetCloseHandle,InternetCloseHandle,InternetCloseHandle,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,0_2_00124C50
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001260D0 lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,InternetOpenA,StrCmpCA,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,InternetConnectA,HttpOpenRequestA,lstrlen,lstrlen,GetProcessHeap,RtlAllocateHeap,lstrlen,lstrlen,lstrlen,lstrlen,HttpSendRequestA,InternetReadFile,lstrlen,lstrcpy,lstrcat,lstrcpy,InternetReadFile,InternetCloseHandle,InternetCloseHandle,InternetCloseHandle,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,0_2_001260D0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00136AA0 lstrcpy,SHGetFolderPathA,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,LocalAlloc,lstrcpy,lstrcpy,lstrcpy,lstrcpy,GetProcessHeap,RtlAllocateHeap,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrlen,lstrlen,lstrlen,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,0_2_00136AA0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001442C0 CryptBinaryToStringA,GetProcessHeap,RtlAllocateHeap,CryptBinaryToStringA,0_2_001442C0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00129B20 CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,0_2_00129B20
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00129B80 CryptUnprotectData,LocalAlloc,LocalFree,0_2_00129B80
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_0012EB80 lstrlen,CryptStringToBinaryA,lstrcat,lstrcat,0_2_0012EB80
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00136CB9 lstrcpy,lstrcpy,lstrcpy,lstrcpy,GetProcessHeap,RtlAllocateHeap,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,StrStrA,lstrlen,lstrcpy,lstrcpy,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrlen,lstrlen,lstrlen,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,0_2_00136CB9
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00127750 GetProcessHeap,RtlAllocateHeap,CryptUnprotectData,WideCharToMultiByte,LocalFree,0_2_00127750
              Source: file.exeStatic PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001319F0 lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,CopyFileA,lstrcpy,lstrcpy,DeleteFileA,FindNextFileA,FindClose,0_2_001319F0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00133A70 wsprintfA,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,DeleteFileA,CopyFileA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,FindClose,0_2_00133A70
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_0012DB80 lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrlen,lstrcpy,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,CopyFileA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,DeleteFileA,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,StrCmpCA,lstrcpy,StrCmpCA,lstrcpy,CopyFileA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,DeleteFileA,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,FindClose,0_2_0012DB80
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001313B9 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,FindClose,0_2_001313B9
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001313A0 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,FindClose,0_2_001313A0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_0013E3F0 wsprintfA,FindFirstFileA,StrCmpCA,StrCmpCA,wsprintfA,StrCmpCA,wsprintfA,wsprintfA,PathMatchSpecA,lstrcat,lstrcat,lstrcat,lstrcat,lstrcat,CopyFileA,lstrcpy,lstrcpy,DeleteFileA,FindNextFileA,FindClose,0_2_0013E3F0
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00134C70 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,StrCmpCA,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,CopyFileA,lstrcpy,CopyFileA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,DeleteFileA,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,FindClose,0_2_00134C70
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_00134C89 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,0_2_00134C89
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001324F9 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,0_2_001324F9
              Source: C:\Users\user\Desktop\file.exeCode function: 0_2_001324E0 lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,FindFirstFileA,StrCmpCA,StrCmpCA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,StrCmpCA,lstrlen,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,GetFileAttributesA,StrCmpCA,lstrlen,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,GetFileAttributesA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,GetFileAttributesA,lstrcpy,lstrcpy,lstrcpy,lstrcpy,FindNextFileA,0_2_001324E0
              Source: C:\Users\user\Desktop\file.ex