Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    19-02-2024 21:29

General

  • Target

    2024-02-19_33c2a1189c2d5716f3e89f9ab0179675_darkside.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: 6D5636AB1EC8D8A28AB1C105CDDC8A98
URLs

https://t.me/bit_decryptor

Signatures

  • Renames multiple (281) files with added filename extension

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

  • 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 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\2024-02-19_33c2a1189c2d5716f3e89f9ab0179675_darkside.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_33c2a1189c2d5716f3e89f9ab0179675_darkside.exe"
    1⤵
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\ProgramData\1F72.tmp
      "C:\ProgramData\1F72.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\1F72.tmp >> NUL
        3⤵
          PID:2732
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x148
      1⤵
        PID:2628

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-3470981204-343661084-3367201002-1000\desktop.ini

        Filesize

        129B

        MD5

        06e53da0b4316c41ee311e70d1c96b17

        SHA1

        14cb0c9f0ea632c60f80d28fae95bbe29abd05a4

        SHA256

        588ffb08e9ecf6807d52be6d328070db8754ce1a137719a58f5722abd2a23cc1

        SHA512

        0c9ad1238ba552ad4d9cf6dd8ed89d1bc0640bbc393c6c5072d85e5dd71b1d9f490d9aaa7554c71370d227827db78b3db22acd533048e844bf0140ba8cb61117

      • C:\7fpKwvu5x.README.txt

        Filesize

        659B

        MD5

        8b35dc9ed788e8c30c3ed8ab02206566

        SHA1

        3628e18728c8c4690c13c695b2d918e1d021a65f

        SHA256

        398ac25676ca35a2799093e964fae1ab4615285d7051db92fe2540b4b8718a36

        SHA512

        5f268672fc244359fd6a25065ede92c77683cde9d5f8daf55df5ca6b9dd5be6c4b200bcea7fbc8e0dccefa8c66d823015cdef5e3ada434108d34fca098325dc1

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

        Filesize

        146KB

        MD5

        953321b2b94607dbef5ec84a81707159

        SHA1

        2fe09b13215631282275c6625c1ead5a20d86024

        SHA256

        7675b9118ebaf13d6ae48f4f3148e11a50314b81e173d4d838541aaace465bd4

        SHA512

        304ac3760816163ccc296f3ce8b4a51556c6ff4a815cca4eaab038e3fdef7f87738a5a032c360fcb995dfa2c614ddf072acd6a93bd4f82c858bcd57a9de93901

      • F:\$RECYCLE.BIN\S-1-5-21-3470981204-343661084-3367201002-1000\DDDDDDDDDDD

        Filesize

        129B

        MD5

        beef9c4f43dcedfb04182c60ba9a91f3

        SHA1

        57aee938544dc8cb69d204b4637267c245714cac

        SHA256

        099a0326d521c8e3332cb4f8d73c2d6d65eac71e9bd5fe8899f4713df6bdc510

        SHA512

        0a3fef3cf9a1d8cfcc4ab814603618513db9699f72aab7cbeb9e7512efb9c9d1c7affa649baa6391c6ff178aee131a5e6e5ef67a695106eb12c48a5b15fc4866

      • \ProgramData\1F72.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

      • memory/1712-0-0x00000000000E0000-0x0000000000120000-memory.dmp

        Filesize

        256KB

      • memory/1716-787-0x00000000004A0000-0x00000000004E0000-memory.dmp

        Filesize

        256KB

      • memory/1716-791-0x000000007EF80000-0x000000007EF81000-memory.dmp

        Filesize

        4KB

      • memory/1716-793-0x000000007EF20000-0x000000007EF21000-memory.dmp

        Filesize

        4KB

      • memory/1716-795-0x000000007EFA0000-0x000000007EFA1000-memory.dmp

        Filesize

        4KB

      • memory/1716-785-0x0000000000400000-0x0000000000407000-memory.dmp

        Filesize

        28KB

      • memory/1716-819-0x000000007EF40000-0x000000007EF41000-memory.dmp

        Filesize

        4KB

      • memory/1716-820-0x000000007EF60000-0x000000007EF61000-memory.dmp

        Filesize

        4KB

      • memory/1716-821-0x0000000000400000-0x0000000000407000-memory.dmp

        Filesize

        28KB