Resubmissions

25-06-2024 16:30

240625-tz654a1bpf 10

25-06-2024 01:57

240625-cddszsxhkl 10

Analysis

  • max time kernel
    160s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-06-2024 16:30

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).

  • Opens file in notepad (likely ransom note) 1 IoCs
  • 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:3812
    • C:\ProgramData\318.tmp
      "C:\ProgramData\318.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\318.tmp >> NUL
        3⤵
          PID:3700
    • 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=3988,i,18168883380598738769,14202261231630113808,262144 --variations-seed-version --mojo-platform-channel-handle=4160 /prefetch:8
      1⤵
        PID:4672
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\sYMY1N6ah.README.txt
        1⤵
        • Opens file in notepad (likely ransom note)
        PID:2408

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-1181767204-2009306918-3718769404-1000\BBBBBBBBBBB

        Filesize

        129B

        MD5

        c9745e4ba4d0d8220e9a731272054cd4

        SHA1

        441965437b9eb1028f3d47f2c627ce017e1b6570

        SHA256

        270f21c99f35034306d6e1b3d04a84d5de723f93000e21f6a29ea438ab485afc

        SHA512

        f45cae141bb703833b694499b88ec184b178f491b04558feab238358877f576e2f45650e0ff9b96929fdcd51217ef248376c25e29920baa1f75ef3c5e64219de

      • C:\ProgramData\318.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

        Filesize

        147KB

        MD5

        4582d989bf35d09de3029bd07c073337

        SHA1

        54018129d15f97f2659a403a93ec3239e44cbdda

        SHA256

        f378f533a28a90436aacd8da4f55cd49f16bb47505ba30925fdf0f9e1143a412

        SHA512

        10de5d7e3c6b40fbbc189ad0d6d2d05a8578ee137fef7824e8fbc6b5a371925b4facc78deb9689a843f41f06180a3fb7fc9516010c0eac1d01585c020b062b2c

      • C:\sYMY1N6ah.README.txt

        Filesize

        1KB

        MD5

        deb2e0756d331362d57ad9fe408c4ff3

        SHA1

        870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

        SHA256

        1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

        SHA512

        e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

      • F:\$RECYCLE.BIN\S-1-5-21-1181767204-2009306918-3718769404-1000\DDDDDDDDDDD

        Filesize

        129B

        MD5

        a02bf7d98472c41d557f865c838d6f7f

        SHA1

        7f6c0bc059a6283bf2a3a5c6a5f9a61ddaa6652b

        SHA256

        e6681bf0c256d8f4018296d476945a0ea971ea615e2ea676aa3b54237becf2b0

        SHA512

        45216b93df480d73d902c89b6ec09fd4958f85047a8c7d412107c5e31b9372e1e9ee1b6ab26b094aba7e564a89d13e85072024edc490a49baa6372c4c7b2df2e

      • memory/2020-3137-0x000000007FE20000-0x000000007FE21000-memory.dmp

        Filesize

        4KB

      • memory/2020-3138-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

        Filesize

        4KB

      • memory/2020-3136-0x00000000023F0000-0x0000000002400000-memory.dmp

        Filesize

        64KB

      • memory/2020-3135-0x00000000023F0000-0x0000000002400000-memory.dmp

        Filesize

        64KB

      • memory/2020-3134-0x000000007FE40000-0x000000007FE41000-memory.dmp

        Filesize

        4KB

      • memory/2020-3168-0x000000007FE00000-0x000000007FE01000-memory.dmp

        Filesize

        4KB

      • memory/2020-3167-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

        Filesize

        4KB

      • memory/3812-1-0x0000000000B90000-0x0000000000BA0000-memory.dmp

        Filesize

        64KB

      • memory/3812-0-0x0000000000B90000-0x0000000000BA0000-memory.dmp

        Filesize

        64KB

      • memory/3812-2-0x0000000000B90000-0x0000000000BA0000-memory.dmp

        Filesize

        64KB