Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    11/06/2024, 18:03

General

  • Target

    2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe

  • Size

    165KB

  • MD5

    212cc02e286e8fb6cdb6b0f29ff9a729

  • SHA1

    832e94d1fc29950d904dbac7aa8b4ce49007f6b1

  • SHA256

    ef1f172c0354bde12b7af5d2a3f38200d83418b511e791590d0a0ed28931f81d

  • SHA512

    da9f8861ea6d7ea6d4ad5dce6204c387086f3939bb30430d078286baa3f719da67e1bfa8cf84b9c3b867372829684c267e5b87b65eae2a31262d06c0bdd9146d

  • SSDEEP

    3072:ZhpAyazIlyazTRMxpIb1r22SnEAADF1ZVNJv5bj45Q3Jv:hZMaz6ad22BAuTZVNJpj45SJv

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\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_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:2716
    • C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe
      C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe
      2⤵
      • Executes dropped EXE
      PID:2992
    • 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:3020

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\NFVpTyMJr7QmrYa.exe

          Filesize

          94KB

          MD5

          ec5e7403f86990ab23caeeb4955f5ffb

          SHA1

          c345479d6dc53a102ccb05259c0c858a1ddd7d8e

          SHA256

          352df104254095ddf925514d99bfb5411c95b5386e90caf06557979f82e16844

          SHA512

          679957452967a3d3f3f1c55a9a510befa2d31e3bdb825a76540e845667f61775f4d18c3b3493133dd671b380907aaae0dd380b95729a448acf48d95ca0fe5206