Analysis

  • max time kernel
    51s
  • max time network
    52s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-06-2024 02:28

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:4564
    • C:\ProgramData\5DEF.tmp
      "C:\ProgramData\5DEF.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\5DEF.tmp >> NUL
        3⤵
          PID:2652

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\$Recycle.Bin\S-1-5-21-1337824034-2731376981-3755436523-1000\AAAAAAAAAAA

      Filesize

      129B

      MD5

      6720b8c80f1d050b92381cdfc9b96e3c

      SHA1

      edb84faf2451983df94a3342114de2d337ad9257

      SHA256

      d9824c37d316fdca02d41d69b68e87ac634f7af19053ca7d1617b4b36072ccac

      SHA512

      e0cfe346d0f04689eea127a02176798b8d2bbd273c49447b3d2e3d5baab414078b7b0d29bffffc3f2d471785215fe713f79fa3ece4731a1b23cfd2fa8ab83cf1

    • C:\ProgramData\5DEF.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

      Filesize

      147KB

      MD5

      7e616d09e23eebdf7567909e022bc60c

      SHA1

      b5a6508d2a661d5e60aa86969689c1a974befb0c

      SHA256

      bc06adc67f78934e68708a356ffda1810f14423ee05ebed55ed4752c2be750d9

      SHA512

      62efbf9b8af5d1902ffcdba7a56f4524c1a7e5811a6cf7d2e3e8db95cdc6257ddad753fa7bf72a754187ebde89f9a85572ef194387709682db7e6140b006867c

    • C:\sYMY1N6ah.README.txt

      Filesize

      1KB

      MD5

      deb2e0756d331362d57ad9fe408c4ff3

      SHA1

      870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

      SHA256

      1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

      SHA512

      e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

    • F:\$RECYCLE.BIN\S-1-5-21-1337824034-2731376981-3755436523-1000\AAAAAAAAAAA

      Filesize

      129B

      MD5

      cc517401187e3e86656ab43ebfb2ba77

      SHA1

      f154e42fc9d8c9ed0b6ad3d4c274a993da88c6ca

      SHA256

      91528594ca4c8c011ab25d9b2ae6881af830e7e49f3c44f4906270291a5d4538

      SHA512

      f7e4c98352b1849930a3a738b89a0dbf33affd8b0e42cd84fa0c584ba66382fcf933d07c309e60e8d9f7c79f6fd3ea8df9307c6cab15f8a3fee6cc5ba9fbe019

    • memory/1716-2748-0x000000007FE20000-0x000000007FE21000-memory.dmp

      Filesize

      4KB

    • memory/1716-2749-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

      Filesize

      4KB

    • memory/1716-2747-0x00000000024E0000-0x00000000024F0000-memory.dmp

      Filesize

      64KB

    • memory/1716-2746-0x00000000024E0000-0x00000000024F0000-memory.dmp

      Filesize

      64KB

    • memory/1716-2745-0x000000007FE40000-0x000000007FE41000-memory.dmp

      Filesize

      4KB

    • memory/1716-2779-0x000000007FE00000-0x000000007FE01000-memory.dmp

      Filesize

      4KB

    • memory/1716-2778-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

      Filesize

      4KB

    • memory/4564-0-0x0000000002840000-0x0000000002850000-memory.dmp

      Filesize

      64KB

    • memory/4564-1-0x0000000002840000-0x0000000002850000-memory.dmp

      Filesize

      64KB

    • memory/4564-2-0x0000000002840000-0x0000000002850000-memory.dmp

      Filesize

      64KB