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Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/06/2024, 12:55

General

  • Target

    2024-06-20_468d816677c7d019a42d3b3237edaa03_bkransomware.exe

  • Size

    135KB

  • MD5

    468d816677c7d019a42d3b3237edaa03

  • SHA1

    78b52296b54d0ad849ed742ec43794440fcc3d74

  • SHA256

    f82b63410d14c666ce9186b623d8a711dd6424d4831f1e775cc9b922a0de5e06

  • SHA512

    2ca9ecda91f96c9961280e74cc4d3e8c05df3fcc1af7f5d79d3f13c210f54d43ef1e88592f60b1d7cb5d46f857a2cf1ace071c0a6e2957bc18708495ed7d5fae

  • SSDEEP

    3072:ZRpAyazIliazTQNVkZ3KY1I4Vq1NFlQ8Jw:xZ8az0GKYPw1NnQ9

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 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-20_468d816677c7d019a42d3b3237edaa03_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-20_468d816677c7d019a42d3b3237edaa03_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Users\Admin\AppData\Local\Temp\ilRUGiZaBbDMCeZ.exe
      C:\Users\Admin\AppData\Local\Temp\ilRUGiZaBbDMCeZ.exe
      2⤵
      • Executes dropped EXE
      PID:4556
    • 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:2152
  • 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 --mojo-platform-channel-handle=4080 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2480

    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

      789KB

      MD5

      910db8c0cd872672592f1c1dc1c17b1f

      SHA1

      152604c669893f9130cf6b2c3ca4b37e6fac57bc

      SHA256

      4b3d1bbbb9ff04180cc5bb46944c651af6d5f733e4135e8e73387072b6b89bfd

      SHA512

      e0563d59b6295b038b6b0cbf999b4f127a64eeab448c7f725927385465120e0ca192bebc2b3506cf55a6d30b9fb962b4787424a42a00b225c1efefc18c2a6e05

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

      Filesize

      64KB

      MD5

      e97c622b03fb2a2598bf019fbbe29f2c

      SHA1

      32698bd1d3a0ff6cf441770d1b2b816285068d19

      SHA256

      5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

      SHA512

      db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

    • C:\Windows\CTS.exe

      Filesize

      71KB

      MD5

      f9d4ab0a726adc9b5e4b7d7b724912f1

      SHA1

      3d42ca2098475924f70ee4a831c4f003b4682328

      SHA256

      b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

      SHA512

      22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432