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Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    06/05/2024, 23:23

General

  • Target

    2024-05-06_4ce9f9fd9985d4f4613173bbfb8c7c89_bkransomware.exe

  • Size

    71KB

  • MD5

    4ce9f9fd9985d4f4613173bbfb8c7c89

  • SHA1

    34bcfe0d4077a4075604199b1b59eb5b6c869b19

  • SHA256

    709fda5f67ce10774ba93082410e662ed6491deda7d9a7c83460a739a841a43e

  • SHA512

    407ecbc8afcc6266265f6d813afe414c68f700ddb879c3d0bec1c5e68edbab868028ab17285e24fe1990351aaa99bcc23b45061c8a2c2a78866106c70823799d

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTP:ZRpAyazIliazTP

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\2024-05-06_4ce9f9fd9985d4f4613173bbfb8c7c89_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-06_4ce9f9fd9985d4f4613173bbfb8c7c89_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1752
    • 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:2252

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Fg8Kh7KaQaNYhcW.exe

    Filesize

    71KB

    MD5

    4e47a50863ff5445f6cc76719fc96594

    SHA1

    32274ccd1974d2bc3eb151c33f6322e81d62fc18

    SHA256

    d2fd7c51f6f60c9e604496c8dc9757f5184cd967672c5dcc732df014831e3bb0

    SHA512

    d26a2f0e3d91aa6d8b63dad8c484c636aaed26948ac50e60856535655047648c6ac783b3556af0e8daee09cfc61689cb0c90833ac0ddfaf685d8e3bd543a3ca0

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432