Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    02/06/2024, 15:25

General

  • Target

    2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe

  • Size

    74KB

  • MD5

    acedaea97b6c0879f4dbdd9d2ed0bd75

  • SHA1

    12023674604e7803918fefa2cd0f3f77d01da876

  • SHA256

    a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18

  • SHA512

    f7aff79ed71e785a300f6a2045a221b4f1cc4db13b636e8fe21f4dbdb8963f312e0935013f6b0199467c4d7d065917cf60a71a84ea977080e3c29bf0c7a47cb0

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTSZEar:ZhpAyazIlyazTE

Malware Config

Signatures

  • Executes dropped EXE 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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2260
    • 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:2448

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\pxEJfDcl0SBDTGw.exe

          Filesize

          74KB

          MD5

          9d350bc5dfdc3ade3a787754cafec2c5

          SHA1

          501ea7deed824b41b6674d6ce26563338ad69898

          SHA256

          dd2e9a5b01e848b3ba43115b6f034a265ac95b79623a81a89e6bc87f430bf9bd

          SHA512

          7010523ee729f8693cf9285f8cea0b3cb5ad3a47fb649d722b9f8a3033a34313004f8afd4cba620656fa68b4e21531dc5b73f1041d3b7be6c34b26ece9c5b8df

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          66df4ffab62e674af2e75b163563fc0b

          SHA1

          dec8a197312e41eeb3cfef01cb2a443f0205cd6e

          SHA256

          075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

          SHA512

          1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25