Analysis

  • max time kernel
    140s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 17:53

General

  • Target

    2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe

  • Size

    72KB

  • MD5

    56c46bfa121fca06c1325981e6c13195

  • SHA1

    edec16c5f91bc13d25e9ae17757992202568e246

  • SHA256

    bfd18f72aab900840cc667f96449dbd01158970223ec1c25df9965ba1ad0b59d

  • SHA512

    5c34bee7eab727ad5bf276219bfcd46b459fbdcc705374c473825de2a281083e228047fae3fec687cd64e558ac05d3a86cc88bdd7528aef10e4f129b8e6001e2

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT4dD:ZhpAyazIlyazT4dD

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\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:536
    • 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:2916
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4456 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3716

    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

            789KB

            MD5

            bf54e6a94aad67a4d3486b1a7b710005

            SHA1

            143028dea97021a7e0e73f1b13dba3bf3ed008f4

            SHA256

            03488e832d54c38ec26bbba20f52457998801f44c958ee428c0cce75564ad4ee

            SHA512

            daab54fbdab9cd1062f81d2032796ceb4a8b472c3791a69b8a56d33ea232dac10cb0441b4f6d533ec5b7ed80a27a5ade1f898b1a80fd570599bf4d47b10ecd60

          • C:\Users\Admin\AppData\Local\Temp\DYyOizMUpYD2WYB.exe

            Filesize

            72KB

            MD5

            5d9b5f41943bf3ae7f7a98c388ee285c

            SHA1

            f1ea2c250e2dfff22c487ca41491ad9b89ecd64d

            SHA256

            42db6416458cb6cc4111287f7e8e26926766f3631227d22a4dcdc5cf116e8e18

            SHA512

            57ec57c2967c61b98007f71f3cfc56091bdaf216bdd3c324dbb6ba65de887247d8d5c15cf2a39ae83673f06b32fada2a3487aa894a5e06cfddb3f12e44d474f2

          • C:\Windows\CTS.exe

            Filesize

            71KB

            MD5

            66df4ffab62e674af2e75b163563fc0b

            SHA1

            dec8a197312e41eeb3cfef01cb2a443f0205cd6e

            SHA256

            075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

            SHA512

            1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25