Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    13-06-2024 00:25

General

  • Target

    2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe

  • Size

    71KB

  • MD5

    08096c6e58536c35881c54a6a74d9d0e

  • SHA1

    e4c9b48548a6d1c6f5a92d1586c6673f7e1f7327

  • SHA256

    bce278f72862767ae49e7493d789747dbc864156d92ebd681ad8828f1c9e9d13

  • SHA512

    42fdca3a6d38524b7f93e8aa75c5f2a6417b9ef825ec8f5af0e481854dd27d27e70d28c2cc2530f811f0d9d3032946410161d4154511797e54001d8ec5ce66a5

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTP:ZhpAyazIlyazTP

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\2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2912
    • 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:2440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\R9VeXk0DbQyge3i.exe

    Filesize

    71KB

    MD5

    cbf08fcb16489bb8ae5127ade06ecefa

    SHA1

    9e9ace43d8280e90b0f897405e758fe6a56a1243

    SHA256

    456fcef0f54577f87a58d7b7817e65dc12f805d4651514c0e274084dd1b827fc

    SHA512

    5750d85bfe5b91d6dab0625a57de3e76a813ba3677a4fb0a292ee7a489ff081ac3c264f2a3e7c30c7324651e25a3e74b7b93ebe58df3fc45fa736b816346fc45

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25