Analysis

  • max time kernel
    80s
  • max time network
    100s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 04:25

General

  • Target

    2024-06-13_2bba3977125de893ab5fd1c7383e26d4_bkransomware.exe

  • Size

    71KB

  • MD5

    2bba3977125de893ab5fd1c7383e26d4

  • SHA1

    b4d5e65e34bd85188d9456a89a5f04cbede42e6d

  • SHA256

    3cc717b344f1164fe5eaff17596dfd2ce49ba8ab50cf07bf068c5df52a1c8d0f

  • SHA512

    a306d421137682cc04adea7a6ad12a635b5215e93251b02cbf27ccf0711d17e8daaa04cdbabcec9bd7c7e26a5687dfa48d8fab52239c0631741c58b44fa3474f

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9

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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-13_2bba3977125de893ab5fd1c7383e26d4_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_2bba3977125de893ab5fd1c7383e26d4_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1316
    • 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:3644

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

    Filesize

    392KB

    MD5

    29359c8ae56c3c6a806788a2026ae4f1

    SHA1

    7afc7e7a4aabc5b67e0de88716975275a0a67232

    SHA256

    99525f121c839957dd90a784d4f06773ccbe039291818531a6600f98e60f70c2

    SHA512

    27b5521839842a5ef5385218eae25261a82efacd7e722246968a0d1b8d968826b6ff8598edd59680b9a58361788a21fd57a29ecd5944bcb64bbfedec592b8883

  • C:\Users\Admin\AppData\Local\Temp\8GS7lyMZ7TUWBJS.exe

    Filesize

    71KB

    MD5

    3c6e6d590822e761aa5b92807c636487

    SHA1

    1d371791bb2ec4f5166c1c9f487fa460b4ddac67

    SHA256

    96eee9137db82f72e28b1b22314bd55217e8513bf0598f5c3122e0da022c5fcb

    SHA512

    789c3f28ead265090c21033d236ed4f1f3c59b4a5ecb56e43dcaaff95f769298315709c4aca9cbe712e29406e7fce8df9a62ebbc758508fffb9c7b0cb084da4f

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25