Analysis

  • max time kernel
    119s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 4 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:2804
    • 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:2052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\5Kp4xS1trS7tr6b.exe

    Filesize

    76KB

    MD5

    bb6d497253ba049a62c2e816afae6b00

    SHA1

    41bc4dcd476a0499314da3e02b93355b324e32c9

    SHA256

    ba6732bf07f8b9a958258fe0d73b15aea9c0ddfd09ba0a3c0506bff0fee0cccd

    SHA512

    a8db70015d063dc5688dd7c104f50820f25c5cb4f2a8acda30e66f52c1c7a936b0e9d6a938a7b553c7b33640eb9e091f4238b0659e4d432d6d3e48875a3560df

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432