Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-02-2024 02:01

General

  • Target

    33c2a1189c2d5716f3e89f9ab0179675.exe

  • Size

    146KB

  • MD5

    33c2a1189c2d5716f3e89f9ab0179675

  • SHA1

    832cbb42ca2d3d772f5fc6836f98bb5b0059ee3b

  • SHA256

    f01909eee3dec5474a5a845deea3f8fb5502ac006f65060a7e945f91c966e266

  • SHA512

    530777cd0805f84b7831b193e8adec637877332b1ecf7005efc960e3fb2f5432b33c44ba758f853f364702e64d781330896fb6fc878314c0de926e547dc18d69

  • SSDEEP

    3072:9FqJogYkcSNm9V7DdOgrDx34Uuv5hQrfT:9Fq2kc4m9tDsIDx31d

Malware Config

Extracted

Path

C:\7fpKwvu5x.README.txt

Ransom Note
!!! ALL YOUR FILES ARE ENCRYPTED!!! All your files, documents, photos, databases and other important files are encrypted. The only way to recover your files is to use a decryptor. To get the decryptor, write to us by mail or telegram, specify the ID of the encrypted files in the letter: Email: [email protected] Telegram: https://t.me/bit_decryptor Warning. * Do not rename encrypted files. * Do not attempt to decrypt data using third party software as this may result in permanent data loss. * Do not contact other people, only we can help you and recover your data. Your personal decryption ID: 6D5636AB1EC8D8A21EEBE5584888536E
URLs

https://t.me/bit_decryptor

Signatures

  • Renames multiple (584) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • 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 1 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\33c2a1189c2d5716f3e89f9ab0179675.exe
    "C:\Users\Admin\AppData\Local\Temp\33c2a1189c2d5716f3e89f9ab0179675.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:936
    • C:\ProgramData\EB1B.tmp
      "C:\ProgramData\EB1B.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4164
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\EB1B.tmp >> NUL
        3⤵
          PID:3124

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\$Recycle.Bin\S-1-5-21-983843758-932321429-1636175382-1000\desktop.ini

      Filesize

      129B

      MD5

      2b3383785a4ef1245ce991281a438e61

      SHA1

      8ea88436e47e0374206aa6c288d188054b99fe9f

      SHA256

      a2a1a6fed7a888df8279a7dffa5d142e779cf14d697169ad6d57daa9eaa2673c

      SHA512

      0c5eba30b60bcad2d622520d080db834b21266f9869dc23c4336acb008320b240ef60a82cc285fb7a6365b0def69ba21d4f5a6452d3538641905f5bf1c97be3a

    • C:\7fpKwvu5x.README.txt

      Filesize

      659B

      MD5

      85c38f851b1ebf97450897d2cee1bf1f

      SHA1

      007a09cd283bb17b6a45b1de3977c08b5f177b03

      SHA256

      1300bd82b3b745791a623c1736e7e1213ae23d9994f4a624400dc516ad261bda

      SHA512

      91fa87894f7329c683e987536df6fea5c9314b6b0e149eb3c8db837258cbd3dc635ff286f15a02948bf685ba1ac720167d0b8547d739b4349142b766a13781f5

    • C:\ProgramData\EB1B.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

      Filesize

      146KB

      MD5

      7eabd8cb3b55a65d31c4d856163d2755

      SHA1

      cc7be339482c9e37420dfc35cef440294731c754

      SHA256

      73fd51365a07852a2d44c66875f9f830291300b9d6fdd47bd966d9b1ce125d6b

      SHA512

      7cda2dae46aa139f315a1fc525b5133c81568ec4a6f031455981f61868cfef3bcf770f63cfd9ff825956478cfb7d3b49f81c870b9656e3e9d58b5bf54217feea

    • F:\$RECYCLE.BIN\S-1-5-21-983843758-932321429-1636175382-1000\CCCCCCCCCCC

      Filesize

      129B

      MD5

      3cace86baac07f0c659f93db5ce68fa5

      SHA1

      b8132fe187fb92db024a250bff408c9f29619c36

      SHA256

      5b5e44369fad56089c170a95e9335ed7f073c6461ceed3c87b6bf63cfb98e106

      SHA512

      772874ad392d8cce7d71593fc98020f2fe1db5451028ee103e975d0503b3f342628e3a36013aeaba06efb093e4aad3f66b66ff87c7e4a3331054d12cc50fe8b5

    • memory/936-2722-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/936-2720-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/936-2721-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/936-0-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/936-2-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/936-1-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

      Filesize

      64KB

    • memory/4164-2727-0x000000007FE40000-0x000000007FE41000-memory.dmp

      Filesize

      4KB

    • memory/4164-2728-0x0000000002430000-0x0000000002440000-memory.dmp

      Filesize

      64KB

    • memory/4164-2729-0x0000000002430000-0x0000000002440000-memory.dmp

      Filesize

      64KB

    • memory/4164-2730-0x000000007FE20000-0x000000007FE21000-memory.dmp

      Filesize

      4KB

    • memory/4164-2731-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

      Filesize

      4KB

    • memory/4164-2760-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

      Filesize

      4KB

    • memory/4164-2761-0x000000007FE00000-0x000000007FE01000-memory.dmp

      Filesize

      4KB