Analysis

  • max time kernel
    119s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04-06-2024 00:49

General

  • Target

    2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe

  • Size

    71KB

  • MD5

    7f7b563cc77e13904ee0314a725cd083

  • SHA1

    08f89112dfdbdb88257d8320846d864b48e9048a

  • SHA256

    06d6584f45c5204cf03d122f344f333b8a0562872a3dc1ad9260d4595ca605c5

  • SHA512

    97728b54f71e8c419b1702e963e13de011271893d4ac1f41ec6439b71d8414019d77204cdbf9f453245bd3c8d2bd2cd79c559a8d93541d6849e9b65035f12087

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT0:ZRpAyazIliazT0

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\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2888
    • 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:3016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\JuEGxPsKv6fl0Fy.exe

    Filesize

    71KB

    MD5

    1d749ab21309f18dcd4409daf60f477e

    SHA1

    3bb45b3a15750ed4c7b22a0b46d88571fa46a546

    SHA256

    4c0176766c12980eed973f3408b9b55a36f181e86bdb6b7d5f0b2a00ada9d81c

    SHA512

    81345697296aa69228d4a04782ccbfc025ac27ba29aacf95ca3208b605c05fd5f3214b3d7dae3a62ee37e8bd92d213c01c9ac1efe67294413e01954960b32432

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432