Resubmissions

25-06-2024 16:30

240625-tz654a1bpf 10

25-06-2024 01:57

240625-cddszsxhkl 10

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

  • 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: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

    • C:\$Recycle.Bin\S-1-5-21-2539840389-1261165778-1087677076-1000\AAAAAAAAAAA

      Filesize

      129B

      MD5

      1e65083cb52ab464466a244587772061

      SHA1

      764ad97d8eb86084e7f7b5875571e7a042225ce8

      SHA256

      66720a8ef03902488e01cff85dd33240f6b3baaa1a6e17da90b2a8e555e6849d

      SHA512

      c684625b0b7675fc85f46b16ca4d57c5882cda620aa16e26beedc3a1a964a3eaee269b563e54f22daf98e9529288c1d69420cf2f27072442efb1ae09ced2df57

    • C:\ProgramData\63AB.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

      Filesize

      147KB

      MD5

      a09b0c4e05b7813f08730b703873a16e

      SHA1

      5cf4433653b6af1de57c11bf26726c4f76b5c767

      SHA256

      ffe737119aa3b637afb8875dbf2a51af6d87cbdd3a4c29656cd8f8562985238d

      SHA512

      8637d530c9733fdea17eed3469b25332e153305fa4f6fc246fa98d1275fe7b10dd7677fc4983d85c9a0e3bbc386300e4744658175795c9063df457c064e31ab4

    • C:\sYMY1N6ah.README.txt

      Filesize

      1KB

      MD5

      deb2e0756d331362d57ad9fe408c4ff3

      SHA1

      870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

      SHA256

      1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

      SHA512

      e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

    • F:\$RECYCLE.BIN\S-1-5-21-2539840389-1261165778-1087677076-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      1c3655a5399249eb49e02677fb753eec

      SHA1

      6d14de76a1130a7cea12b6a31ec1b419be3f237e

      SHA256

      e9e15877f914186abf7fca5b7b77be673d23e0e1c29ed68221a27c60b8682e0e

      SHA512

      c5b53761a09e2993a003f12d2196f50854bb364d60e4b6188fae7ad5a92b99dcd1a8b6f6431536754c575fdc38017ecd704c3b970e14d21a994dbabfa8a5bba1

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

      Filesize

      64KB

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

      Filesize

      64KB

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

      Filesize

      64KB

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

      Filesize

      4KB

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

      Filesize

      64KB

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

      Filesize

      64KB

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

      Filesize

      4KB

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

      Filesize

      4KB

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

      Filesize

      4KB

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

      Filesize

      4KB