Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-07-2024 11:15

General

  • Target

    4775a43b260ece750168d27cdf39934b4d656521e553c313e27f346ed0e3792a.exe

  • Size

    389KB

  • MD5

    71ad00ee30ac6efedccd63e5372d70bd

  • SHA1

    66f71fee98e186f80fd257871d77c7fba2c0f491

  • SHA256

    4775a43b260ece750168d27cdf39934b4d656521e553c313e27f346ed0e3792a

  • SHA512

    ab76fa01a49478effddf01c5c7c9a1e7b0126f4d3b8f2b51e7bb3d2cf4a3f10a663c6c2b649990bba8556db62ff45a09ac128a7b5dbadbe86ee15121664c955b

  • SSDEEP

    6144:qF2qRcEtSqH6rC8sRA8WBZY/OEMW615+kjOKt4oM9UOFqA92179k0EaUYc72di80:q5tS7rCxMMm5+ipCWb7gaUYcOi8cEO

Malware Config

Extracted

Family

stealc

Botnet

default

C2

http://85.28.47.101

Attributes
  • url_path

    /f3ee98d7eec07fb9.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4775a43b260ece750168d27cdf39934b4d656521e553c313e27f346ed0e3792a.exe
    "C:\Users\Admin\AppData\Local\Temp\4775a43b260ece750168d27cdf39934b4d656521e553c313e27f346ed0e3792a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
        PID:2972
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        2⤵
          PID:4484
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          2⤵
          • Loads dropped DLL
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          PID:1572

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\mozglue.dll

        Filesize

        593KB

        MD5

        c8fd9be83bc728cc04beffafc2907fe9

        SHA1

        95ab9f701e0024cedfbd312bcfe4e726744c4f2e

        SHA256

        ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

        SHA512

        fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

      • C:\ProgramData\nss3.dll

        Filesize

        2.0MB

        MD5

        1cc453cdf74f31e4d913ff9c10acdde2

        SHA1

        6e85eae544d6e965f15fa5c39700fa7202f3aafe

        SHA256

        ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

        SHA512

        dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

      • memory/1036-0-0x0000000003020000-0x0000000003021000-memory.dmp

        Filesize

        4KB

      • memory/1572-1-0x0000000000400000-0x000000000063C000-memory.dmp

        Filesize

        2.2MB

      • memory/1572-4-0x0000000000400000-0x000000000063C000-memory.dmp

        Filesize

        2.2MB

      • memory/1572-3-0x0000000000400000-0x000000000063C000-memory.dmp

        Filesize

        2.2MB

      • memory/1572-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        Filesize

        972KB

      • memory/1572-77-0x0000000000400000-0x000000000063C000-memory.dmp

        Filesize

        2.2MB