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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
    04/05/2024, 10:25

General

  • Target

    2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe

  • Size

    214KB

  • MD5

    0b9fdec44c17afee1305cfba0a5aa20b

  • SHA1

    0e6fa5d6d451c3b6644a0ec5b77a5ea78ce7eb9f

  • SHA256

    99acb0153f756f96c418e9e5b14d3148c3c9faba157786c2db199ac44be67c2c

  • SHA512

    aa0ef5df434940de31bd8f8c1b6943875d4f2445c48692c1b6f15c816fafdff7b9594324b769a2a74b6aa9d11c4220c34f1ce5dcc8fa68aa320f67d0e4aa7202

  • SSDEEP

    3072:ZhpAyazIlyazTmAvJMAgcayFHoh7YgB3u+2IcqUfN6eaTxvwGXVxuA3Yip:hZMazDMAFtFIWglu+kfNXaTGIeA3Yip

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_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:2320
    • C:\Users\Admin\AppData\Local\Temp\52T4sTBYNKLzIxU.exe
      C:\Users\Admin\AppData\Local\Temp\52T4sTBYNKLzIxU.exe
      2⤵
      • Executes dropped EXE
      PID:2084
    • 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:2996

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • \Users\Admin\AppData\Local\Temp\52T4sTBYNKLzIxU.exe

    Filesize

    143KB

    MD5

    2fdb371d45181dff59577110ba1064e2

    SHA1

    42a5833cb0ac90e38d734d1327bb3f7c7a6aa453

    SHA256

    80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155

    SHA512

    52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20

  • memory/2084-12-0x000007FEF5C43000-0x000007FEF5C44000-memory.dmp

    Filesize

    4KB

  • memory/2084-14-0x0000000000D30000-0x0000000000D58000-memory.dmp

    Filesize

    160KB