Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    14/05/2024, 10:45

General

  • Target

    2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe

  • Size

    168KB

  • MD5

    bea8900667c2c8b68971ea5b44b6c17a

  • SHA1

    29a847fe290723dd893f147829d47c6f1c36efa6

  • SHA256

    38dd06ab3a27af090c3963b34944df6db726be55298bc7c84a4d6fee61eb1daf

  • SHA512

    6e541f1d276bb47179cf43a2026cdf0f34db6eaa7fa27b74ba40e8712037d151042495e99e51d1b1f4cc3d14bd703b2b6c915e0ccee01eb6fe64b6b18c979160

  • SSDEEP

    3072:ZRpAyazIliazTnjybskVaXQnoKvJOPFbQ1MMDRepoDejPLLu7:xZ8azbjy3agnov1Q6PaKT/U

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 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 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-14_bea8900667c2c8b68971ea5b44b6c17a_bkransomware.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2308
    • C:\Users\Admin\AppData\Local\Temp\61p7r1kkpTLUBIl.exe
      C:\Users\Admin\AppData\Local\Temp\61p7r1kkpTLUBIl.exe
      2⤵
      • Executes dropped EXE
      PID:2020
    • 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:1300

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

        • \Users\Admin\AppData\Local\Temp\61p7r1kkpTLUBIl.exe

          Filesize

          97KB

          MD5

          0655a0af4a2ff9bf591f614ba8f5721f

          SHA1

          b10d53dccec179109aff61b86ecca65be816f3c4

          SHA256

          d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32

          SHA512

          9051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f