Analysis

  • max time kernel
    51s
  • max time network
    54s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-06-2024 23:42

General

  • Target

    2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe

  • Size

    96KB

  • MD5

    f2ce67d38e837bcfd5590eb3ef5780f2

  • SHA1

    81b51cdaa8203e6bfa7c02924b27233a9473a643

  • SHA256

    c851f928e60b89904940b6631194cfb79973013cfae63424fed961929de265be

  • SHA512

    6b106c572c7ea7b772457d5be3c8ed85f3ef92db64ecd920ead43051d69c1194acbf0c4805faf1a99e474db4cd61cbb7cfc6350efd22adece60098dd747ec5b5

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT/RbZ3TZ3Yp:ZRpAyazIliazT/RbR130

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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1596
    • C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.exe
      C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.exe
      2⤵
      • Executes dropped EXE
      PID:1896
    • 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:1672

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

    f7f844e7b91a1879ed7208049d04da83

    SHA1

    488bd0cde36f3bf52475122895182e5e21932341

    SHA256

    9ee6b1e7abfbf229de6ade1587e55fdee89676f57e8bbb1f9a730ad05060f81e

    SHA512

    30321023a6445ffed6e0d58015153461685fdf5f421a8f65531202b716df3b68436557f63492a8591f4074c3a5e72f55798d4dd25c959a29d2f334c91478a64f

  • C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.exe

    Filesize

    25KB

    MD5

    abbd49c180a2f8703f6306d6fa731fdc

    SHA1

    d63f4bfe7f74936b2fbace803e3da6103fbf6586

    SHA256

    5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

    SHA512

    290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

  • memory/1896-9-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB