Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 14:39

General

  • Target

    2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe

  • Size

    71KB

  • MD5

    ebb6b5964e08f55110d0af5306743b2b

  • SHA1

    d58928af79ee0562c30b80265921b768cb46d81f

  • SHA256

    7fea5bb76f83869740578da6b5c5e7255884e061c7a0a6279ee6c8abebf729e9

  • SHA512

    44de38a82d50d7cc0a938a826ae7d47b8ecf629542313bf63d599a399615daa56f12b3684bdf40737d8ba84a622aa6f56e86ff36704f34805a7b39c4d6566601

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT/:ZRpAyazIliazT/

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:3824

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

          Filesize

          394KB

          MD5

          d650a5a448d0487b0d2f625740c24dc4

          SHA1

          0d35dc6d0465968863ee3ccc6ec10f79842d1cf7

          SHA256

          de9a8e2b9596405306713c9acf27d2136d06928e16e604ac39a99f28110da867

          SHA512

          63e52e1408e67af598b8cf1d953a3be4e3061b49be4edd00d643762edf6ee1cd1e618694f102eda8ef9f90650d1bcf3f5630a12bdb77510750263168adba14ad

        • C:\Users\Admin\AppData\Local\Temp\FqFa9l3vKIVDvib.exe

          Filesize

          71KB

          MD5

          cf96b1ca52d937926c8f55ce8e576d24

          SHA1

          94e6f495566eb6e1a4858fc7d24c21e607ac1d51

          SHA256

          41f747d50cee9c0fbd69fe655f78200574d1fe30dae033c1dd1e1f8419997811

          SHA512

          ab5e2a9b4af59caf4f7019b47a1d710964a8707593e9eeb47a72160542e30d6628b9c7ce83eee283aaf88046dde43f5491edc3276d330c70a32faebe4ca95e49

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432