Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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
  • 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 6 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⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2184
    • C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe
      C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe
      2⤵
      • Executes dropped EXE
      PID:5032
    • 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:1404
  • 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 --field-trial-handle=4200,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=1960 /prefetch:8
    1⤵
      PID:1540

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            392KB

            MD5

            0f7f86a84658374dc6343c57a83286ce

            SHA1

            fb6a4e392c4baafb53693e01580b6a49af55ff5c

            SHA256

            7db21555b64c9b855a4821685b8d5e2f37141983363f3a305e8edbdd4a5942bc

            SHA512

            df3032574185d3df0cd2cc909b41338169743380017fe7d97df40c757f613e6973b31f2b253ac905dbbdb904a8e7d7535bfd8cc44cd01d1484461dffdcd04f76

          • C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe

            Filesize

            94KB

            MD5

            ec5e7403f86990ab23caeeb4955f5ffb

            SHA1

            c345479d6dc53a102ccb05259c0c858a1ddd7d8e

            SHA256

            352df104254095ddf925514d99bfb5411c95b5386e90caf06557979f82e16844

            SHA512

            679957452967a3d3f3f1c55a9a510befa2d31e3bdb825a76540e845667f61775f4d18c3b3493133dd671b380907aaae0dd380b95729a448acf48d95ca0fe5206

          • C:\Windows\CTS.exe

            Filesize

            71KB

            MD5

            66df4ffab62e674af2e75b163563fc0b

            SHA1

            dec8a197312e41eeb3cfef01cb2a443f0205cd6e

            SHA256

            075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

            SHA512

            1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25