Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    27/05/2024, 14:39

General

  • Target

    2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe

  • Size

    214KB

  • MD5

    ea244df2ceec4693ddb3cab2824334aa

  • SHA1

    6bdc52f7bd23e31905149fedac31166c05e15a52

  • SHA256

    20385a70d740d5a8260450df7f5cc67d7f33cc04d1f58685949237233f47c1ab

  • SHA512

    827591a16355a29ed02d854eda56a2c6ce4d0f06032e1038b65f1101ff9e05fc4e834d300adfbbb58484686c6caed2e92f342e7524d1da8e8e05d74b4fca2212

  • SSDEEP

    3072:ZRpAyazIliazTcYubxmW6OrYhmBC9IdlIWuazrA8aqcnPVJIqi65z9zVJwP:xZ8azoYKmOAmEuzspnPDIU95JA

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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:2068
    • C:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe
      C:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe
      2⤵
      • Executes dropped EXE
      PID:2176
    • 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:1656

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\ehZzv3VlsBvGJ1P.exe

          Filesize

          143KB

          MD5

          38f108cddb6619fba80f8382d5227ece

          SHA1

          12fd277bf756f22cfae3043900e4aff8b9f05ed9

          SHA256

          8296fe257b8c34398e3f291764454ec3cd9cbe06d60989b632ef4ba6c73ae5dc

          SHA512

          3db732c23f10122c78cffc6b6a5b11836ade1a23f5c6f9a192f2be2fa99c5bd7afb7a9e29c5d518a888cdd2091f9ac41b244214be226152830e96f5ec2cca424

        • memory/2176-12-0x000007FEF5703000-0x000007FEF5704000-memory.dmp

          Filesize

          4KB

        • memory/2176-14-0x0000000000940000-0x0000000000968000-memory.dmp

          Filesize

          160KB

        • memory/2176-15-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

          Filesize

          9.9MB