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Resubmissions

26/02/2025, 22:29

250226-2epdjsvygx 10

26/02/2025, 21:48

250226-1nyg5stzdt 10

21/02/2025, 20:45

250221-zjsweszqar 10

Analysis

  • max time kernel
    719s
  • max time network
    720s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    26/02/2025, 22:29

General

  • Target

    brain.exe

  • Size

    147KB

  • MD5

    448f1796fe8de02194b21c0715e0a5f6

  • SHA1

    935c0b39837319fda571aa800b67d997b79c3198

  • SHA256

    eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12

  • SHA512

    0b93b2c881b1351ff688089abf12bbfcff279c5d6ca8733d6d821c83148d73c85cfedf5ab5bc02c2145970124b518551db3a9fc701d8084f01009ae20f71a831

  • SSDEEP

    3072:l6glyuxE4GsUPnliByocWep0yjEJ3hDRMK89nB2:l6gDBGpvEByocWeebbMjV4

Malware Config

Extracted

Path

C:\sYMY1N6ah.README.txt

Family

braincipher

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

  • Brain Cipher

    Ransomware family based on Lockbit that was first observed in June 2024.

  • Braincipher family
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 2 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\brain.exe
    "C:\Users\Admin\AppData\Local\Temp\brain.exe"
    1⤵
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\ProgramData\D836.tmp
      "C:\ProgramData\D836.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\D836.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1924
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x14c
    1⤵
      PID:2252
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\EnableCheckpoint.hta"
      1⤵
      • System Location Discovery: System Language Discovery
      • Modifies Internet Explorer settings
      PID:1368

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-2703099537-420551529-3771253338-1000\desktop.ini

      Filesize

      129B

      MD5

      0858b98a82d66ba9be9043b922cf60a4

      SHA1

      0b8d47678da998df1f8db46d62c562a1c57e6dc5

      SHA256

      fcbc42819af7d30427e46192006ca264d1ffa67b4bd029d5f4cf24e3848c186b

      SHA512

      554b0d8b86e0434edf39444d702a826b505cd16b85af05d8da8a2842f6884c2782f1c46bc12f6c16b042ccadbba21197fb11f4cf6c141343e0051d7cb91243ed

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

      Filesize

      147KB

      MD5

      07e7cd9e2b9c7030ca6af3bcaaea718b

      SHA1

      ad8c28991aab6b73ff74e8948ecfea9d1e2c5bf0

      SHA256

      73c1ade4196b4bfa28cc724b6758e909e5deae351e2b84c79dd7e57a5802dc2d

      SHA512

      e2d4d6f9df2fd5df59ceb6e6f3418c2b0b43e4a9e9f5c0c5492d1cb80bb9217cb51af70932d406d5daa0673d0cca521bbff47e31a5215f3d449f08f62e1a4bed

    • C:\sYMY1N6ah.README.txt

      Filesize

      1KB

      MD5

      deb2e0756d331362d57ad9fe408c4ff3

      SHA1

      870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

      SHA256

      1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

      SHA512

      e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

    • F:\$RECYCLE.BIN\S-1-5-21-2703099537-420551529-3771253338-1000\CCCCCCCCCCC

      Filesize

      129B

      MD5

      2085613b67019b35e650eebf7573beee

      SHA1

      e81dd0350af13cabc88b23b70b120fe2ed36f3ba

      SHA256

      1240693bbdd872ea21b36933de311c8c6453ea6b7b2320f48910b9ae41681b67

      SHA512

      bc9552308cca89ea8e3ed99b15acb09b058e575d670d9efb17710c307796cb4ffb21fff4877333e79c79b64652eb15b9609721a6a8d71846b3c3055974fd5956

    • \ProgramData\D836.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • memory/2128-885-0x0000000000401000-0x0000000000404000-memory.dmp

      Filesize

      12KB

    • memory/2128-887-0x0000000000400000-0x0000000000407000-memory.dmp

      Filesize

      28KB

    • memory/2316-0-0x0000000002170000-0x00000000021B0000-memory.dmp

      Filesize

      256KB