Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-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 4 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:2332
    • 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:1676

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\6uBoROWjHwgJTO0.exe

          Filesize

          71KB

          MD5

          dc7a5183a53f21a8fc2170c70c2b3dda

          SHA1

          b7fd818e91336bf604c2fd40926d2a6fbf99c1d1

          SHA256

          f5a76464983618eb675aed0018208ad1553728e67e8577c2d18959665b26df41

          SHA512

          c95ff0590708d6d18d8e5873c64ebaa11a262aa5f0f6a44929d366a8005d980ceba4a33bfbdeca7ee04db8952bc3733085bd8d4e8c82a0d06fe0f7745c5052d6

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432