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Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    04/06/2024, 17:26

General

  • Target

    2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe

  • Size

    71KB

  • MD5

    44976294bb1b928a214c8e4b8e6decfe

  • SHA1

    eed0563267e21fe98c0a2d3700acc7c3e3bb162b

  • SHA256

    c633fecb35c492dc22642a00d4aab8a003be084197cbb7e669613dc5d15df489

  • SHA512

    bb468ba2e0b3ce574fb4997d860b33c495aa61152bd03bd240a6c0354d83a7ab3094ab0923180538414e47f44bd75d56a8e38cb25d72c0bda37eae6cd4810863

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTa:ZRpAyazIliazTa

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\2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_44976294bb1b928a214c8e4b8e6decfe_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2236
    • 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:2076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\DNGtVjPzDKqCE7c.exe

    Filesize

    71KB

    MD5

    a566eee162cb986ba9ef741a987ffeb7

    SHA1

    6abec7a1967990e4f4f5915c92f6b04a2a6eb146

    SHA256

    1d5b44f3e43dcce12e3ffdc395fcfd71e805620a2c0bb39de0c60c51af319cb8

    SHA512

    aa341fe13c7774caa5f74b36e739d293d485deb8f4a8133d844266504f5e8b9b9c8c2cfcc7ed24021bc936421403f371eac61770c9f84b849568f7fc633ce930

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432