Analysis

  • max time kernel
    55s
  • max time network
    59s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    09-06-2022 17:04

General

  • Target

    DOMUMENTO DE TRANSACCION REALIZADA.exe

  • Size

    126KB

  • MD5

    8c52bf0ad28692c8e274874606c362dd

  • SHA1

    ebcda75002db41d1a7f3597ca9467aab625439f7

  • SHA256

    ac6da2e8ec05b1e8e562c15745997b48c0f51aeb823d4858445123060f40bb57

  • SHA512

    62dc35a98757814ceaec1f5ff41d97641e5ceabb3e5511ad79be3db272d63fbd001bb62ea9f019a773dd5293dd4993a87d775825dda827b5dd9c1a05d274bf24

Malware Config

Extracted

Family

bitrat

Version

1.38

C2

breswew.duckdns.org:1880

Attributes
  • communication_password

    202cb962ac59075b964b07152d234b70

  • tor_process

    tor

Signatures

  • BitRAT

    BitRAT is a remote access tool written in C++ and uses leaked source code from other families.

  • suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

    suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DOMUMENTO DE TRANSACCION REALIZADA.exe
    "C:\Users\Admin\AppData\Local\Temp\DOMUMENTO DE TRANSACCION REALIZADA.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe"
      2⤵
        PID:4352
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout 20
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2532
        • C:\Windows\SysWOW64\timeout.exe
          timeout 20
          3⤵
          • Delays execution with timeout.exe
          PID:4836
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        2⤵
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:204

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/204-139-0x0000000000400000-0x00000000007E4000-memory.dmp

      Filesize

      3.9MB

    • memory/204-138-0x0000000000400000-0x00000000007E4000-memory.dmp

      Filesize

      3.9MB

    • memory/204-143-0x0000000075420000-0x0000000075459000-memory.dmp

      Filesize

      228KB

    • memory/204-142-0x0000000075080000-0x00000000750B9000-memory.dmp

      Filesize

      228KB

    • memory/204-141-0x0000000000400000-0x00000000007E4000-memory.dmp

      Filesize

      3.9MB

    • memory/204-137-0x0000000000400000-0x00000000007E4000-memory.dmp

      Filesize

      3.9MB

    • memory/204-140-0x0000000000400000-0x00000000007E4000-memory.dmp

      Filesize

      3.9MB

    • memory/204-136-0x0000000000000000-mapping.dmp

    • memory/2532-134-0x0000000000000000-mapping.dmp

    • memory/4352-131-0x0000000000000000-mapping.dmp

    • memory/4668-130-0x00000000002F0000-0x0000000000314000-memory.dmp

      Filesize

      144KB

    • memory/4668-133-0x0000000005EA0000-0x0000000005F32000-memory.dmp

      Filesize

      584KB

    • memory/4668-132-0x0000000006350000-0x00000000068F4000-memory.dmp

      Filesize

      5.6MB

    • memory/4836-135-0x0000000000000000-mapping.dmp