Analysis

  • max time kernel
    133s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 09:04

General

  • Target

    2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe

  • Size

    233KB

  • MD5

    0602adffa199c4db6b7033938771df93

  • SHA1

    2f755f123490cf6c71f551ee63fb8dea660607f6

  • SHA256

    d9dfdc2f41479782868e7329e988f5731ad7449c96ec2fbbaa5e6a058d424d73

  • SHA512

    783b77b541c5b09c85354daf2bd4c1a7f4d89026431b8db52c5684cde7c7ff4439d2b522927106c984a7bc3b09a27671cef5ef44346a88c2c54751dce08e1844

  • SSDEEP

    6144:xZ8az3eGPlZlJIuGlJTCv4m/37aZFx1JQzrcno63OciypJ:xC0uGPXv8Cv4m/LaZFNYxIOcNJ

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\2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4616
    • 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:5044
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=3940 /prefetch:8
    1⤵
      PID:2500

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      394KB

      MD5

      fd54ebc42e81e19adf928edd9e92685c

      SHA1

      6d6a7a10569a56a045e6b9d5f3f323c2221978a9

      SHA256

      c16508b5a276c205cbca78b8d66518aae4a31661c4e5c850ec14c022c1f6b55d

      SHA512

      3c899b57c0ea4a191bc0f8eb295bb6b72527f22310ef58ecb38272aab643fc85734bdd33d578fd345e56df647db9479e4828d7829cf7715cc448fbf2b92b732e

    • C:\Users\Admin\AppData\Local\Temp\BnkL4GR9AHYZFMH.exe

      Filesize

      233KB

      MD5

      a7d6ae40dc69a0c5c6bbba05420b68a4

      SHA1

      e06bab6db0f20ce0410d29b5cab395d758c2d19f

      SHA256

      7727bed72d0896cce49d3868767d63b9d7fe04a13aad11f207ea9fb42a523278

      SHA512

      991e6f43e8bfd3212e26bc3eb63b2b57d5e1ef90d829a2053acbd205eb9e0e732ed47bb2165d5bf25e08e9d3d17b27b3dd44bbfe9c3778682ac780d8418018b5

    • C:\Windows\CTS.exe

      Filesize

      71KB

      MD5

      f9d4ab0a726adc9b5e4b7d7b724912f1

      SHA1

      3d42ca2098475924f70ee4a831c4f003b4682328

      SHA256

      b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

      SHA512

      22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432