Resubmissions

27-06-2024 07:27

240627-h97zla1fkm 10

Analysis

  • max time kernel
    142s
  • max time network
    105s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2024 07:27

General

  • Target

    eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe

  • Size

    147KB

  • MD5

    448f1796fe8de02194b21c0715e0a5f6

  • SHA1

    935c0b39837319fda571aa800b67d997b79c3198

  • SHA256

    eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12

  • SHA512

    0b93b2c881b1351ff688089abf12bbfcff279c5d6ca8733d6d821c83148d73c85cfedf5ab5bc02c2145970124b518551db3a9fc701d8084f01009ae20f71a831

  • SSDEEP

    3072:l6glyuxE4GsUPnliByocWep0yjEJ3hDRMK89nB2:l6gDBGpvEByocWeebbMjV4

Malware Config

Extracted

Path

C:\sYMY1N6ah.README.txt

Ransom Note
*** Welcome to Brain Cipher Ransomware! *** Dear managers! If you're reading this, it means your systems have been hacked and encrypted and your data stolen. *** The most proper way to safely recover your data is through our support. We can recover your systems within 4-6 hours. In order for it to be successful, you must follow a few points: 1.Don't go to the police, etc. 2.Do not attempt to recover data on your own. 3.Do not take the help of third-party data recovery companies. In most cases, they are scammers who will pay us a ransom and take a for themselves. *** If you violate any 1 of these points, we will refuse to cooperate with you!!! 3 steps to data recovery: 1. Download and install Tor Browser (https://www.torproject.org/download/) 2. Go to our support page: http://mybmtbgd7aprdnw2ekxht5qap5daam2wch25coqerrq2zdioanob34ad.onion 3. Enter your encryption ID: M8AL5cWJEU5CnMMPwCdt4x9NVn0ZY2uNtIgnKwkDJwdPbnanVROYFzGmgUCImexTGDmINYgSZXdlhM7D199lNMb294TGY2 Email to support: [email protected]
URLs

http://mybmtbgd7aprdnw2ekxht5qap5daam2wch25coqerrq2zdioanob34ad.onion

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • 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.

  • Drops desktop.ini file(s) 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe
    "C:\Users\Admin\AppData\Local\Temp\eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3076
    • C:\ProgramData\5488.tmp
      "C:\ProgramData\5488.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:3128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\5488.tmp >> NUL
        3⤵
          PID:868
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:2444

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-200405930-3877336739-3533750831-1000\desktop.ini

        Filesize

        129B

        MD5

        351f717c608a7aee5fba788dd2afac21

        SHA1

        c670173502b824f3f9ae2bfc64318ef5788958a8

        SHA256

        129e4a807fb7bd00348b57e62d22073e3e18e1a7807cc9a5da83f9af73609760

        SHA512

        e55ecfb5633454ba980fcc6bcec15f8c3a1a51964b413720dab0cd2294a35d7edb9b507ea53ca956aa922df2bd7be0bd9955579dd98cb6b41837926307e60cab

      • C:\ProgramData\5488.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

      • C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

        Filesize

        147KB

        MD5

        719849478b3fce0d749a147b6e5a76d0

        SHA1

        d43a750a0d680061ff5089e140cc5a7acc2597c1

        SHA256

        0087b6482d0139c967f9023e54e06434dcf0e28989132f3c51fc5dbc246aee9b

        SHA512

        e60fe188299bdb8d3b4a802a2c15d9f3adb5243c0e94bb0ee636069f9e2666d0c7537df5030f761c58cf4bd2a4ce2f22eb78e3af9de139d643b67538b109eb87

      • C:\sYMY1N6ah.README.txt

        Filesize

        1KB

        MD5

        deb2e0756d331362d57ad9fe408c4ff3

        SHA1

        870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

        SHA256

        1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

        SHA512

        e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

      • F:\$RECYCLE.BIN\S-1-5-21-200405930-3877336739-3533750831-1000\MMMMMMMMMMM

        Filesize

        129B

        MD5

        1351ebc5d6205579daa2ba2812df46fa

        SHA1

        fb1e5ae664c0d2b5e3a0e96bbf5fe7be22dc3771

        SHA256

        902255e8624c228476e679a73a009899c00484ff07fca768cba77605e0b5082c

        SHA512

        b83352b6c2ca749c6eef250bc686418589fc273ac4e53d8b0fbd84b79cd3f9c1ef18fdad5ee538b600b4cfe36b4aa10e758ff6f4cec4339feeb8c16a3f572d69

      • memory/3076-0-0x0000000003300000-0x0000000003310000-memory.dmp

        Filesize

        64KB

      • memory/3076-1-0x0000000003300000-0x0000000003310000-memory.dmp

        Filesize

        64KB

      • memory/3076-2-0x0000000003300000-0x0000000003310000-memory.dmp

        Filesize

        64KB

      • memory/3128-2722-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

        Filesize

        4KB

      • memory/3128-2721-0x000000007FE20000-0x000000007FE21000-memory.dmp

        Filesize

        4KB

      • memory/3128-2718-0x000000007FE40000-0x000000007FE41000-memory.dmp

        Filesize

        4KB

      • memory/3128-2720-0x0000000002670000-0x0000000002680000-memory.dmp

        Filesize

        64KB

      • memory/3128-2719-0x0000000002670000-0x0000000002680000-memory.dmp

        Filesize

        64KB

      • memory/3128-2751-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

        Filesize

        4KB

      • memory/3128-2752-0x000000007FE00000-0x000000007FE01000-memory.dmp

        Filesize

        4KB