Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 01:04

General

  • Target

    2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe

  • Size

    71KB

  • MD5

    578186df7b810fe5809213537aaea468

  • SHA1

    06cdbd529d612d24d336f984b0fcf5ae79061c18

  • SHA256

    7b911eda3edcb5cfc53b82f5aba8e50f87dc772728836424332c6c02ad3af6e7

  • SHA512

    9c3d10bc36e55137d9ee664d0ed0744ec3130c5d07d792ed913b2603744d605d257d5131fd9343a47292af39974780e0116457f4bee2330bf406fa760cff1461

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTLX:ZRpAyazIliazTLX

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\2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_578186df7b810fe5809213537aaea468_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3588
    • 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:4572

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

          394KB

          MD5

          ee907f5a0476be7887d985bf0cef8f05

          SHA1

          e2fbae42d9c8494715e9d07a6624d6b105762ad4

          SHA256

          6b6305b19882c457ac24735746b6fbe7c6699cd96016fc5dc58249d35d22b097

          SHA512

          39f26f2ef7d017ce46ee2484f68d76334cdf2e2365026a4944d900134f113093c0bebc8e35a8412311a458034863c735124f04ab8894ddffcd550413ba051832

        • C:\Users\Admin\AppData\Local\Temp\V44oPYzHtw10PIy.exe

          Filesize

          71KB

          MD5

          9600074862b1d726778322e81220bcf5

          SHA1

          12886b9a7038d51ba76248dc16740aa87f00a512

          SHA256

          76b1a378d4fbfcd013dc6e900e099ee9222aae0cd159dec44121a02f361c8877

          SHA512

          26c38037fa609c74772039319bec237798f067d4b0ddf7b9e125ab254f2f1d6c5a530ca8b3abe85826361aff3b3a68a227f4d3dae2ce6d9790cff09d71dd91ae

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432