Analysis

  • max time kernel
    121s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    07-06-2024 22:43

General

  • Target

    2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe

  • Size

    135KB

  • MD5

    77d75393a71b68e6d4315225d2776c12

  • SHA1

    88124a6e0dade8408d687b9bcac066275c8aea8e

  • SHA256

    a697fa27a6a63f248d12c4716bf5feaf678c09aeea695bd8e8a0fd8829e94287

  • SHA512

    22dd2c6a7fe273abe440d2463d3b04e28e79d8ce1d7d9b266c6f56ea075065369f6bf5b2941a360dee313db55bded95386850e806193dc4c813b60848adac16f

  • SSDEEP

    3072:ZRpAyazIliazTJM8yKI7swt99g0kFZeAmkD5zXv:xZ8azFdyLTt9UFcAmkZ

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\2024-06-07_77d75393a71b68e6d4315225d2776c12_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-07_77d75393a71b68e6d4315225d2776c12_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:2184
    • C:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exe
      C:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exe
      2⤵
      • Executes dropped EXE
      PID:2168
    • 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:2472

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exe

    Filesize

    135KB

    MD5

    52d5d737b83f051d88f2a8935d36961c

    SHA1

    c22fc71cb7c3cb19a6c49787b6866716d8e3d53f

    SHA256

    1d23aec5bd8b5184f54017abb0f29099b864b1ff434409eda6a7f78a0a8a9d0b

    SHA512

    e5a04603fe3a5cad6ae2708e352e804fe247b848d4d11fb829dd020f50f9ef7bc128425b45772d8f4d4d619905cee6f6708de1851e9834a889e3330335e4e9d8

  • C:\Users\Admin\AppData\Local\Temp\6rQ7trbrQFFiTry.exe

    Filesize

    64KB

    MD5

    a32a382b8a5a906e03a83b4f3e5b7a9b

    SHA1

    11e2bdd0798761f93cce363329996af6c17ed796

    SHA256

    75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

    SHA512

    ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432