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Analysis

  • max time kernel
    122s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    08/06/2024, 20:00

General

  • Target

    2024-06-08_f39103b32640dba3d650eaffa1320f4e_bkransomware.exe

  • Size

    135KB

  • MD5

    f39103b32640dba3d650eaffa1320f4e

  • SHA1

    5c386ece25dd4a33204d0275c95bbf202a263ee2

  • SHA256

    686d5e165fa58c5f989e168f715df19727cb5c4712ad479f959a1852039f94c1

  • SHA512

    f6f99071eb91dd16e2f1f175ab89c2a9f6392426beb095261fdfdcbe558c04fe9c3afb7f298b252af87ca98a26afc385fbb35d859178360582972d33613a708e

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTfChJjAYXtpcCXPegK+3up8t4i4eXVR:ZRpAyazIliazTKMYXtpcCm+tZ9xf/VF

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 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\2024-06-08_f39103b32640dba3d650eaffa1320f4e_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-08_f39103b32640dba3d650eaffa1320f4e_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:1484
    • C:\Users\Admin\AppData\Local\Temp\RzsImGp2gsv8P1p.exe
      C:\Users\Admin\AppData\Local\Temp\RzsImGp2gsv8P1p.exe
      2⤵
      • Executes dropped EXE
      PID:2076
    • 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:1356

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\RzsImGp2gsv8P1p.exe

    Filesize

    64KB

    MD5

    ae6ce17005c63b7e9bf15a2a21abb315

    SHA1

    9b6bdfb9d648fa422f54ec07b8c8ea70389c09eb

    SHA256

    4a3387a54eeca83f3a8ff1f5f282f7966c9e7bfe159c8eb45444cab01b3e167e

    SHA512

    c883a5f599540d636efc8c0abc05aab7bad0aa1b10ab507f43f18e0fba905a10b94ff2f1ba10ae0fee15cc1b90a165a768dc078fda0ac27474f0eef66f6a11af