Analysis

  • max time kernel
    119s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    26/05/2024, 10:41

General

  • Target

    2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe

  • Size

    170KB

  • MD5

    8ea90cd710a570f5d3c737e1113156c6

  • SHA1

    3a69166056f787b3377d86773dc93234e8c9afb5

  • SHA256

    a84ddfc94e595d086ba20fcd54691695454f246a084e4a1d55dd67b33d3cf3d3

  • SHA512

    cd775fe137de0a10abf247b15b4e09fa2d0866ff26da1bd977004cb5ad3cc71317294243e630873c03a17882d2ecc7b4075857985b50e3fc78a6859d95bf0fc8

  • SSDEEP

    3072:ZRpAyazIliazTjbAbvejKQyaEnTSNG4gklU1iJ3hh/POyBP4D:xZ8azH2eDyammG4gbgJjXh4D

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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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:1540
    • C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe
      C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe
      2⤵
      • Executes dropped EXE
      PID:2388
    • 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:2176

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\3w5jv5J6HqYxnzp.exe

          Filesize

          99KB

          MD5

          af88cab288e8213a11a7ea5313363d31

          SHA1

          cb769e3246d5244a0040621e919f7c519ba49986

          SHA256

          7407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366

          SHA512

          a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679