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
    31/05/2024, 21:29

General

  • Target

    2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe

  • Size

    135KB

  • MD5

    b83e98f0083e2369f05f169e399f7167

  • SHA1

    3bd25e38715f8cbbf33d55ab306d73c350972890

  • SHA256

    6096f8b923caa302fd2f4a3c03581b4fbe2bc4788270537e5cf0d735ec6174f9

  • SHA512

    6c594df53ed407566d145b04285cac60915d5fa899b9e5a8fedd9213d465f0dec8c404b6471b0be0343acfd5018eaf787697bf631ce5a3b0694e06def21d139a

  • SSDEEP

    3072:ZRpAyazIliazT9SUoCyp0aI8hj6zLu5WBUqXz1y8XWL:xZ8azxSUo/rJ6zq5WBUqXz1yH

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\2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_b83e98f0083e2369f05f169e399f7167_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:2240
    • C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe
      C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe
      2⤵
      • Executes dropped EXE
      PID:1448
    • 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:1536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe

    Filesize

    135KB

    MD5

    fbebed3ee61274a917e6ac1075ef283a

    SHA1

    6fa77a6404151d8f0d8aa98e898eb653df1829a6

    SHA256

    3afce13a682c4c943d099167c22836ed9f57ecb95f5df0260c49a3968e8a02c2

    SHA512

    cf4e6d23d15031d6e5a778435baf32ef7c46b2386540545940374698100b9503ca0907b7a7f58f62fb73a204865863d442889c3b641b8adbd594ded6311295f8

  • C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe

    Filesize

    64KB

    MD5

    e97c622b03fb2a2598bf019fbbe29f2c

    SHA1

    32698bd1d3a0ff6cf441770d1b2b816285068d19

    SHA256

    5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

    SHA512

    db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432