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Analysis

  • max time kernel
    147s
  • max time network
    137s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/08/2024, 14:54

General

  • Target

    05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767.exe

  • Size

    439KB

  • MD5

    95d8ef6aaeae33dae91636b2bde473b8

  • SHA1

    6e79574a1fd0af774f985b3fcf646039d30cc7e8

  • SHA256

    05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767

  • SHA512

    2982681c763db9dc3af710db4d8ba260d8c5591a37a9df13529a4e7a0a08cfd7fd6dbde5c6922b69baeeaf3222212a6697cf961304ec386e1dd5f5b022e13061

  • SSDEEP

    6144:XsaeVjbUSAODc/mDHJKzBJvPKcQQfHAijx7TSig0yw6J:XsamHDDpuBhKX2jlGiyw6

Malware Config

Extracted

Path

C:\HdbtqCuyh.README.txt

Ransom Note
[Your Files Have Been Encrypted] Hello, Your files have been encrypted with strong encryption algorithms. To regain access to your data, you need to follow the instructions below: Do Not Attempt to Recover Your Files: Any attempt to recover your files using third-party tools will result in permanent data loss. Pay the Ransom: You must pay a ransom of 1 Bitcoin to receive the decryption key. Payment must be made within 72 hours to avoid data loss. Contact Us on Telegram: To get the payment details and further instructions, contact us via Telegram at @BIBIL_0DAY. Decryption Key: After payment is confirmed, we will send you the decryption key and instructions on how to unlock your files. Warning: If you do not contact us or pay within the given timeframe, your data will be permanently lost. Do not attempt to contact us via any other means. We will not respond. Your encrypted files are your responsibility. Telegram Username: @BIBIL_0DAY

Signatures

  • Renames multiple (584) 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
  • 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
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Drops file in System32 directory 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767.exe
    "C:\Users\Admin\AppData\Local\Temp\05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3624
    • C:\Users\Admin\AppData\Local\Temp\05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767.exe
      "C:\Users\Admin\AppData\Local\Temp\05f9891bb4ca2b87b476e3d3f415e329a547d3cb65741b908cd570eb96575767.exe"
      2⤵
      • Drops desktop.ini file(s)
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1960
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
        • Drops file in System32 directory
        PID:3508
      • C:\ProgramData\CCC7.tmp
        "C:\ProgramData\CCC7.tmp"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: RenamesItself
        • Suspicious use of WriteProcessMemory
        PID:1456
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\CCC7.tmp >> NUL
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4412
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:1664
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:4688
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{EA76D4E3-3EB5-43F2-A729-566397247FEB}.xps" 133677752895930000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of SetWindowsHookEx
        PID:3848

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-4272559161-3282441186-401869126-1000\desktop.ini

      Filesize

      129B

      MD5

      71b0f53a64f1d258983f8959a93da47f

      SHA1

      df26b37be451a9da8246fbf900d4cc2bfd9a2c05

      SHA256

      ea0814a1636ec7067c05d8ff2dd379b5538861b166a063e807cb35dc1c0d9c67

      SHA512

      432e573a507a00a9da8cb793b7bcc9a1ab4ea8ba6b518d8d78bd654dee608eb7116abbe363b6c967ddc88e7734a2ea9d7445996e27c871016491f576fd6b3de1

    • C:\HdbtqCuyh.README.txt

      Filesize

      980B

      MD5

      751940dccf55d21d7dcb7b8e614154d9

      SHA1

      5ef19237b4aaede4e95992356b2ec1481c1d8253

      SHA256

      875eafed5ef1785ec9cbd071d039aea59a1cfee0b62a0105d9b57118860ceac5

      SHA512

      afcfb8806c17fcdf1e1160a92719a79617ce4c4f6339c412bfaa3cfade6d290e2ecc936bec9f30b631ecef304744caa2e2a1a3f89e4e4e0f705fe6882e3236ce

    • C:\ProgramData\CCC7.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2

      Filesize

      4KB

      MD5

      80387eda8ba3cb9b39b424917f9c1f95

      SHA1

      863c35c3b39de38ef0bd0a8d2c0714cb43cdd1fa

      SHA256

      70df421b632475e3adf16a3dd4f7db303bd4ef27611937209322386b81b6b9a4

      SHA512

      9a6c5c3f411e718bd67a5209f673a68f7a323cabf46d1c3a8676f18acb9fe851648eea063880a9dc37ffb3b9c570898ad8260e8f70ef67190bb46f3a7f78bd6e

    • F:\$RECYCLE.BIN\S-1-5-21-4272559161-3282441186-401869126-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      a724d7f454ca1fd9a923b250d9024ce7

      SHA1

      64c6907eb1f3761dc89283dae1664b33665bb4d6

      SHA256

      d21cc61e870d1a9316f04819e0f545203c4bf17087abee9c6855d992df710072

      SHA512

      4760a1fd617ab9ba895bfda300709826d8291de2e1dcc4859862051b76bf7aac37f2aaa0b7b2d93c8d51d0ad10eed5fef8d4b3009cad686dbe7775462b34ea0b

    • memory/1960-2857-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-2868-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-23-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-20-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-13-0x0000000002F90000-0x0000000002FA0000-memory.dmp

      Filesize

      64KB

    • memory/1960-176-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-12-0x0000000002F90000-0x0000000002FA0000-memory.dmp

      Filesize

      64KB

    • memory/1960-8-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-617-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-2870-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-15-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-14-0x0000000002F90000-0x0000000002FA0000-memory.dmp

      Filesize

      64KB

    • memory/1960-2859-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-11-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/1960-2-0x0000000000D70000-0x0000000000D98000-memory.dmp

      Filesize

      160KB

    • memory/3848-2891-0x00007FF7FF230000-0x00007FF7FF240000-memory.dmp

      Filesize

      64KB

    • memory/3848-2890-0x00007FF7FF230000-0x00007FF7FF240000-memory.dmp

      Filesize

      64KB

    • memory/3848-2892-0x00007FF7FF230000-0x00007FF7FF240000-memory.dmp

      Filesize

      64KB

    • memory/3848-2893-0x00007FF7FF230000-0x00007FF7FF240000-memory.dmp

      Filesize

      64KB

    • memory/3848-2894-0x00007FF7FD010000-0x00007FF7FD020000-memory.dmp

      Filesize

      64KB

    • memory/3848-2895-0x00007FF7FD010000-0x00007FF7FD020000-memory.dmp

      Filesize

      64KB

    • memory/3848-2889-0x00007FF7FF230000-0x00007FF7FF240000-memory.dmp

      Filesize

      64KB