Analysis

  • max time kernel
    120s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    26/05/2024, 11:44

General

  • Target

    2024-05-26_a6c2da62e1eafd6e088d165f122f27cb_bkransomware.exe

  • Size

    71KB

  • MD5

    a6c2da62e1eafd6e088d165f122f27cb

  • SHA1

    1af00e798010b9b999921c35153db81d0da023e0

  • SHA256

    06ae3631e881c3b0ca604e0aef7692206074bd1540146606632220ecdd828ab8

  • SHA512

    5a34e02921031d88e1c31eaa68032b5b968cabd04bbc2ca9fb3d78d219eb916a82bf7adf923f40927544cdcaae63fbd223db50e65e561acb048f856c59b30a75

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTo:ZRpAyazIliazTo

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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_a6c2da62e1eafd6e088d165f122f27cb_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_a6c2da62e1eafd6e088d165f122f27cb_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2356
    • 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:2208

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\q8zRP0pkzRegETd.exe

          Filesize

          425B

          MD5

          9a8a6b3f068281a44b8c70961bda9396

          SHA1

          4729589b244a7af9b5869e813b4457a22c291d31

          SHA256

          0b4c7af99f41b6d1343a5cdb9d9d5d7413733432c1fa461fa0bd80cefc66f4f7

          SHA512

          b71a1dc6e0b82a12f25aa8803105c8c3c77c6ea84c3f867905c91260cf292e40676be4c7325a992c65eff20f8f49c54e23616a8086a2efbe5b3cfa04594e76db

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432