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Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    29/05/2024, 11:57

General

  • Target

    2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe

  • Size

    71KB

  • MD5

    694389f5fe3d942957d3057cde4b3084

  • SHA1

    d3f5db605c9cfebd61b228cf5744fcc8f6cffd78

  • SHA256

    383e04cc53d06cdf31235cbce56c3b6f7ad8a3def771fd723ff9648db87d1adb

  • SHA512

    b41c11b453293b353d1b1113d62139b762bfc94520937ff58a130b88d1666e3adb61cdb5c4ecc893db430459c1c43f2a926147e4c3b1b921a6798f48d1706a46

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTS:ZhpAyazIlyazTS

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\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1736
    • 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:3040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\glzRvpHl8wpbMmj.exe

    Filesize

    71KB

    MD5

    0291077ca4d83a3a60b241b682cb3405

    SHA1

    379d11ac2eda18b01a2ffc7c88f4aebd183fe217

    SHA256

    873c2d61db0c9d786f1e6ae2b922601b904a65d6e5d545c043447af6c6db1fde

    SHA512

    f98d1e9e1575930d855b6aa0ddb85f8b612ff44357e1231447427ad48346e287b9d27efa38613f3bf11a521590ea7b134ab8af0dc7dd8a62f9d567f1b89ca813

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25