Resubmissions

25-06-2024 07:15

240625-h28adsyhpr 10

24-06-2024 19:42

240624-yem9pssfkj 10

Analysis

  • max time kernel
    100s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-06-2024 19:42

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:704
    • C:\ProgramData\B054.tmp
      "C:\ProgramData\B054.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4280
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\B054.tmp >> NUL
        3⤵
          PID:5168

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\$Recycle.Bin\S-1-5-21-3169499791-3545231813-3156325206-1000\EEEEEEEEEEE

      Filesize

      129B

      MD5

      2118927510d5d4b6636e6e4fa9974d95

      SHA1

      b5892beaa9998df58d3c9e9519bc4ec5cae43708

      SHA256

      53f178a22b674c877827a8c91d64519edc5afbeab7ae9442c1414baff2b03b1a

      SHA512

      cbafd71bb1e2cddc3cf75c82fc2993f94461ff87aedefd4cb6fd3819e233bd55f760d43079c830f21cf2b02af2468aafc8959f2372878d06f80a0275606181ec

    • C:\ProgramData\B054.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

      Filesize

      147KB

      MD5

      9b62a75f0f9064615607beb3c116be8d

      SHA1

      b2953b59b3b2e3945c3cb163b29e8f8c94a13611

      SHA256

      81ab17c0eda1f55c89b596f8c9df76c51a38c889721bb969c509f782db067560

      SHA512

      cab4b3fe8e2b5d2e48508f01c360bd2d50f5bc11d3cfec7a9334282feea188245b2cb9007b1ade8e1d19a64fa7cc49122d2634d5384cca3bad0bca9198cf2379

    • C:\sYMY1N6ah.README.txt

      Filesize

      1KB

      MD5

      deb2e0756d331362d57ad9fe408c4ff3

      SHA1

      870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

      SHA256

      1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

      SHA512

      e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

    • F:\$RECYCLE.BIN\S-1-5-21-3169499791-3545231813-3156325206-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      9d5e2e210ae9b3bc13b9fae3a0071168

      SHA1

      846cb22ca9876211959bd93c9b48a9688861b45a

      SHA256

      9b0ff3566cca3f4a3ece0f8041d78af887b51da7f62146c13c2207bb8c5d9acd

      SHA512

      f7c91246f82b2137d4e888c1bd9c1c1976d228199e5cb60a9b185bd3bc64f33c5da3f14894aebf08deb38d2244e05956e6a153d881df9cee6e571646b57a5870

    • memory/704-27-0x0000000002C70000-0x0000000002C80000-memory.dmp

      Filesize

      64KB

    • memory/704-9-0x0000000002C70000-0x0000000002C80000-memory.dmp

      Filesize

      64KB

    • memory/704-24-0x0000000002C70000-0x0000000002C80000-memory.dmp

      Filesize

      64KB

    • memory/4280-2798-0x000000007FE40000-0x000000007FE41000-memory.dmp

      Filesize

      4KB

    • memory/4280-2802-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

      Filesize

      4KB

    • memory/4280-2801-0x000000007FE20000-0x000000007FE21000-memory.dmp

      Filesize

      4KB

    • memory/4280-2800-0x0000000000640000-0x0000000000650000-memory.dmp

      Filesize

      64KB

    • memory/4280-2799-0x0000000000640000-0x0000000000650000-memory.dmp

      Filesize

      64KB

    • memory/4280-2832-0x000000007FE00000-0x000000007FE01000-memory.dmp

      Filesize

      4KB

    • memory/4280-2831-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

      Filesize

      4KB