Resubmissions

26-06-2024 05:55

240626-gmmjpsydng 10

26-06-2024 02:10

240626-cl8ckaydld 10

Analysis

  • max time kernel
    122s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    26-06-2024 02:10

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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 14 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\eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe
    "C:\Users\Admin\AppData\Local\Temp\eb82946fa0de261e92f8f60aa878c9fef9ebb34fdababa66995403b110118b12.exe"
    1⤵
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2180
    • C:\ProgramData\AB1E.tmp
      "C:\ProgramData\AB1E.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2392
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\AB1E.tmp >> NUL
        3⤵
          PID:1592
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x154
      1⤵
        PID:1876

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-39690363-730359138-1046745555-1000\desktop.ini

        Filesize

        129B

        MD5

        049d566832f416e52046cc7fb76fe9f5

        SHA1

        971a6e557ac57a1cc57853203781573b9bfbf760

        SHA256

        01c62859e1f7925343dc18448e7033e980e8ecc419ff01323570eca759f6b178

        SHA512

        4a8c1302439c67ec7cbbd13b2dc24e0d8c55282e4ee215834983c14c6992b8b2c65d00ba40b10797e4e2003c452464bd2194ca80451fa3e6db594468be01481c

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

        Filesize

        147KB

        MD5

        bf47f9a27e85090b68da2b2012848d64

        SHA1

        d3b6c0b84159b117e158fe087fe8fbb0cc4ac57f

        SHA256

        79eedda02f9c9c070cd85bb8dadd5e65295a466f9737bca166d8cb080de5b8df

        SHA512

        65d63b4df2a7aa7068b7b0b288fac47bf1b72b3671485d3941d7a487c67fdea2b60459b02fa38dc37eb192f818037bb26317b752a6ddb7a7190106fb4c08064f

      • C:\sYMY1N6ah.README.txt

        Filesize

        1KB

        MD5

        deb2e0756d331362d57ad9fe408c4ff3

        SHA1

        870865aad7c7cccafbca0c1f50f7eecaedbd4bf1

        SHA256

        1ddacee1d25936970279557169037a335b362f86c3797ded625d68077bd0145c

        SHA512

        e218624d2704517a358df0dfb794116bbeed3ad81daae8c07d5d969e61e7936ed043911008f4816d663de373fd23515219c8038dd22e5838af7df1678a0134a6

      • F:\$RECYCLE.BIN\S-1-5-21-39690363-730359138-1046745555-1000\DDDDDDDDDDD

        Filesize

        129B

        MD5

        385d525471d7702954e4ae03bbc6dee6

        SHA1

        2ebcf3c2f120c64c41bdcdfd4c9986cd35c3a679

        SHA256

        fb4baefa82fbc14cd765c9c8b79274d123f7383d16a0432687e271d9aabef2d5

        SHA512

        8895f99cb67112691aa6e71afe812b09bd61d495aa946e46caacf25aaa0f1c7ec3f6800950828ef4e8bdd66786c9ffe709c84cb886cb4b501ac6b6043e79de5f

      • \ProgramData\AB1E.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

      • memory/2180-0-0x0000000000C10000-0x0000000000C50000-memory.dmp

        Filesize

        256KB

      • memory/2392-896-0x0000000000401000-0x0000000000404000-memory.dmp

        Filesize

        12KB

      • memory/2392-898-0x0000000000400000-0x0000000000407000-memory.dmp

        Filesize

        28KB