Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    13-06-2024 03:45

General

  • Target

    2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe

  • Size

    71KB

  • MD5

    9a9168e5de25fc2ff66702805cb63db4

  • SHA1

    a1b6b0fd7f88f08fd2c73c00dedda115d726e8f9

  • SHA256

    e101f7550db0f220224e846a6a14da87450d2e401af676dc98c45aaf1cb22404

  • SHA512

    13f001d00f44bcca8f74b06d9ce0fdc5889453f4720d3ab2c3a556fc5ee9877a15d2fee48890b66d8fdf7fa074f1bf7c227c6850566f7621f8b0105e142d83ab

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO

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_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1868
    • 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:2160

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\mObfcWnqn7Aixh5.exe

    Filesize

    71KB

    MD5

    fecc3dfb533d92e662f8f45fa8257b7a

    SHA1

    f1deeebbc0d4b3a0a904f20bb0bee2492e0ea4d9

    SHA256

    a1896e93895f2c7857136bdb2d3ca384095bdda82be4ac81d52463ac6986beaa

    SHA512

    405bb7e2de5a36a6c7838ea8733ceac39007e6b3f1d9f57c71824002981e81a05c4fc78fb6e7b6f70a97b88a52ae062a2faa469211d0650e3b8e322eeae7b81a

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25