Analysis

  • max time kernel
    133s
  • max time network
    101s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-06-2024 07:44

General

  • Target

    2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe

  • Size

    214KB

  • MD5

    03687dfe73e5dcbe025c25b6b24a6879

  • SHA1

    005087f70523a539ce88b63371541532274df440

  • SHA256

    6bc9e25575d9913b16aa1e3d289325daa809d7d1babb4923b34ad44f4de00775

  • SHA512

    7a859848f238bb5f21ebd905f2548240da2144e8f92dcd8a3d551935845ba66561eae67445c045e4d0a5b59026c451cff0fd7d11cd1d4c9f21abc57c2c778c33

  • SSDEEP

    6144:xZ8azGvd0q5vq1TUxbYv1V7HVmVGQXArma3x+:xC0WKq5v4oAz71mV5s3Q

Malware Config

Signatures

  • Executes dropped EXE 2 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 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3380
    • C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe
      C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe
      2⤵
      • Executes dropped EXE
      PID:3664
    • 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:2524

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

    392KB

    MD5

    aac372ef237223a34ade3829745631f8

    SHA1

    ac641b8928a17e3d398ff8486f4165ec52c4957b

    SHA256

    0f9ddaffd7043f5c7e711b19d74441d43925efccecca1ac6b263a87250274702

    SHA512

    5dbbafc4ecd5dbc485257e5314b52539cd7a5a8bb630da7277d0c9c621d6db717baed530f077248282870bad387c7a088c914df9618c53a292206aff120251f3

  • C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe

    Filesize

    143KB

    MD5

    2fdb371d45181dff59577110ba1064e2

    SHA1

    42a5833cb0ac90e38d734d1327bb3f7c7a6aa453

    SHA256

    80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155

    SHA512

    52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

  • memory/3664-9-0x0000000000DD0000-0x0000000000DF8000-memory.dmp

    Filesize

    160KB

  • memory/3664-11-0x00007FFE899C3000-0x00007FFE899C5000-memory.dmp

    Filesize

    8KB