Resubmissions

25/06/2024, 16:30

240625-tz654a1bpf10

25/06/2024, 01:57

240625-cddszsxhkl10

Analysis

  • max time kernel
    147s
  • max time network
    150s
  • 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, 01:57

General

  • Target
    eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe
  • Size 147KB
  • Sample240625-cddszsxhkl
  • SHA256 eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12
  • MD5 SHA1 SHA512 SSDEEP

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:2844
    • C:\ProgramData\63AB.tmp
      "C:\ProgramData\63AB.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:3776
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\63AB.tmp >> NUL
        3⤵
          PID:2532

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          AAAAAAAAAAA

          • Path C:\$Recycle.Bin\S-1-5-21-2539840389-1261165778-1087677076-1000\AAAAAAAAAAA
          • Size 129B
          • SHA256 66720a8ef03902488e01cff85dd33240f6b3baaa1a6e17da90b2a8e555e6849d
          • MD5 SHA1 SHA512

          63AB.tmp

          • Path C:\ProgramData\63AB.tmp
          • Size 14KB
          • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
          • MD5 SHA1 SHA512 SSDEEP

          DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

          • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
          • Size 147KB
          • SHA256 ffe737119aa3b637afb8875dbf2a51af6d87cbdd3a4c29656cd8f8562985238d
          • MD5 SHA1 SHA512 SSDEEP

          sYMY1N6ah.README.txt

          • Path C:\sYMY1N6ah.README.txt
          • Size 1KB
          • SHA256 1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c
          • MD5 SHA1 SHA512

          DDDDDDDDDDD

          • Path F:\$RECYCLE.BIN\S-1-5-21-2539840389-1261165778-1087677076-1000\DDDDDDDDDDD
          • Size 129B
          • SHA256 e9e15877f914186abf7fca5b7b77be673d23e0e1c29ed68221a27c60b8682e0e
          • MD5 SHA1 SHA512

          memory/2844-0-0x0000000000DD0000-0x0000000000DE0000-memory.dmp

          memory/2844-1-0x0000000000DD0000-0x0000000000DE0000-memory.dmp

          memory/2844-2-0x0000000000DD0000-0x0000000000DE0000-memory.dmp

          memory/3776-2711-0x000000007FE20000-0x000000007FE21000-memory.dmp

          memory/3776-2710-0x0000000000570000-0x0000000000580000-memory.dmp

          memory/3776-2709-0x0000000000570000-0x0000000000580000-memory.dmp

          memory/3776-2708-0x000000007FE40000-0x000000007FE41000-memory.dmp

          memory/3776-2712-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

          memory/3776-2742-0x000000007FE00000-0x000000007FE01000-memory.dmp

          memory/3776-2741-0x000000007FDE0000-0x000000007FDE1000-memory.dmp