Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-06-2024 09:26

General

  • Target

    2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe

  • Size

    76KB

  • MD5

    02f6b237cd741d9110ee2cbfc1a2714f

  • SHA1

    b84541238cede116e5a67fe9b6235c48bacb29b1

  • SHA256

    b0c12ac6700ed13dd70a09c67aad3559d3020c330fc71c9f3c53ecc9afdea98a

  • SHA512

    22bd1e1d2e588193d773f7eb279b31de09b4337f1350f0f00e708506fe1a29a7b079e8be2b30fa9c3d87b897b09430e494a6796df92d49bea8251c4ade2030f4

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTT:ZRpAyazIliazTT

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\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4416
    • 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:2836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    394KB

    MD5

    0d8515b646df5568af9ebbde76ce47a6

    SHA1

    887d62b947ab9e9d69d6af832b163e165a659b2c

    SHA256

    b8f20fc9ed2ae07f25b775eb5afebc12fe188317008d451703774142b39c0dcf

    SHA512

    4b02ad5f7a952d60603fea22662a2e7b42d3a476cf1559708dc0e70d9cd8a9d9ca6faa98550983274f9b979433b3375bac6859b342d9c74106ccbb705feaf2cd

  • C:\Users\Admin\AppData\Local\Temp\CebFuOpU7cx9Klf.exe

    Filesize

    76KB

    MD5

    e617000fbc466207295ff6d9d10ef922

    SHA1

    ad1beaa2fc9f07dd9d9cba930ca1766bba5aae16

    SHA256

    9f9906dcbe562a433a07bb7573a9b858ce502bca9356a3b1dd0898dbdd5a2719

    SHA512

    525a88dd2bb9c8f683f24376044fa6dc6d6fe93e8f13757cb8eec88f9d39c82953c9593f65466a04f5be9fa905f729958662da84145d9987d559a43777a0637c

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432