Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    01-06-2024 07:42

General

  • Target

    2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe

  • Size

    168KB

  • MD5

    948fc3db93f39956720672a129137317

  • SHA1

    d495202dc69bc9e0eaf51cddeca0d5168417eda9

  • SHA256

    460b7f1e0a91b9c5ab96217d923d2f164b439fbbfac76e1245ca8d08ebe47216

  • SHA512

    c6ded6b00ec81a418cb3b43de9fb92b7320477e8aecaf779538d062e0d6204e290c37f8f97c1ed7f1df3ea9ddd9df0002ac2f786b800e883b8dab329a11200bd

  • SSDEEP

    3072:ZRpAyazIliazTIR5nf2BKJUD8yMujohKNUDAmQoBCYA:xZ8azUR5nfZi8yMuGAZoHA

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\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_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:2528
    • C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe
      C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe
      2⤵
      • Executes dropped EXE
      PID:2152
    • 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:2912

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe

    Filesize

    97KB

    MD5

    0655a0af4a2ff9bf591f614ba8f5721f

    SHA1

    b10d53dccec179109aff61b86ecca65be816f3c4

    SHA256

    d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32

    SHA512

    9051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432