Resubmissions

25-06-2024 07:15

240625-h28adsyhpr 10

24-06-2024 19:42

240624-yem9pssfkj 10

Analysis

  • max time kernel
    98s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-06-2024 07:15

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:916
    • C:\ProgramData\53EC.tmp
      "C:\ProgramData\53EC.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4272
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\53EC.tmp >> NUL
        3⤵
          PID:5060
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3480

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-2447855248-390457009-3660902674-1000\FFFFFFFFFFF

        Filesize

        129B

        MD5

        962e787d533fe9437f7613d305d63c95

        SHA1

        313f35cf521e219f05b4a2ac8b3d9f38bf88df53

        SHA256

        6477c1d5d4adaeeb5e781c7857d19c414d31440de4c4b80c423feeea4638a8c4

        SHA512

        c77cfe9b0ce52c8ac56637596d242aaf047fef7dbfe835b1983a1a9e97d098f2635186e2fe39230b3f5e9acdedf74a65639a36997e112b524e3f09ea8eba936e

      • C:\ProgramData\53EC.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

        Filesize

        147KB

        MD5

        ce5ff3fe6cb41affc438814c79fafdf1

        SHA1

        34ec83fb9d860b7fb59859077f2e003cf16b37f9

        SHA256

        99d110da504f548cc9126639f86d81fe4d13a23cf61f9d6a19ce1fe8c4284677

        SHA512

        8bf133da20b6d2ee98ac1dceb636ca850e1556869ee83b7809917a3eba2c4e4da66006c2753ecb014981f6f674264e2bfda7ea7af78840add95ad15074088c58

      • C:\sYMY1N6ah.README.txt

        Filesize

        1KB

        MD5

        deb2e0756d331362d57ad9fe408c4ff3

        SHA1

        870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

        SHA256

        1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

        SHA512

        e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

      • F:\$RECYCLE.BIN\S-1-5-21-2447855248-390457009-3660902674-1000\DDDDDDDDDDD

        Filesize

        129B

        MD5

        b580ea7edfb71acbeca6ee4bf2d79c16

        SHA1

        0e99d55bf969e82bcdf0d48ad5cc8daa9093bd50

        SHA256

        9eea5449c45be0c8d84f87286f1dfe629bc6da437628a988b7ef2e004413f3db

        SHA512

        7072254ee8d9051f2e8dbe466109bb1e0ba78fd57455b6c956b901d2ac0c46db39131f6588012c8d4c2f0fad5f51a03f23477f031076cb3c0d9c6db1480499b3

      • memory/916-0-0x0000000002680000-0x0000000002690000-memory.dmp

        Filesize

        64KB

      • memory/916-1-0x0000000002680000-0x0000000002690000-memory.dmp

        Filesize

        64KB

      • memory/916-2-0x0000000002680000-0x0000000002690000-memory.dmp

        Filesize

        64KB

      • memory/4272-2723-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

        Filesize

        4KB

      • memory/4272-2722-0x000000007FE20000-0x000000007FE21000-memory.dmp

        Filesize

        4KB

      • memory/4272-2721-0x0000000002380000-0x0000000002390000-memory.dmp

        Filesize

        64KB

      • memory/4272-2719-0x000000007FE40000-0x000000007FE41000-memory.dmp

        Filesize

        4KB

      • memory/4272-2720-0x0000000002380000-0x0000000002390000-memory.dmp

        Filesize

        64KB

      • memory/4272-2753-0x000000007FE00000-0x000000007FE01000-memory.dmp

        Filesize

        4KB

      • memory/4272-2752-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

        Filesize

        4KB