Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 00:42

General

  • Target
    2024-03-29_70294431a35382fd5523a68975df000a_darkside.exe
  • Size 145KB
  • Sample240329-a2fldach3t
  • SHA256 5cdc16281645be976e0554e3492ed54fd6ebc8504ece9055070d038a61ed29a2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (589) 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
  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 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 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-29_70294431a35382fd5523a68975df000a_darkside.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-29_70294431a35382fd5523a68975df000a_darkside.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1628
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:4752
    • C:\ProgramData\BF83.tmp
      "C:\ProgramData\BF83.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4120
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\BF83.tmp >> NUL
        3⤵
          PID:2160
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
      1⤵
        PID:4256
      • C:\Windows\system32\printfilterpipelinesvc.exe
        C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
        1⤵
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:740
        • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
          /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{C7058D9E-7A90-437C-B7AC-3AF2E3455580}.xps" 133561466129920000
          2⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of SetWindowsHookEx
          PID:4068

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            desktop.ini

            • Path C:\$Recycle.Bin\S-1-5-21-513485977-2495024337-1260977654-1000\desktop.ini
            • Size 129B
            • SHA256 2111a970e935c0a60888ab4d71a4d787ec354396a73fba22164e30705ee35e89
            • MD5 SHA1 SHA512

            NP27kMiUF.README.txt

            • Path C:\NP27kMiUF.README.txt
            • Size 328B
            • SHA256 8a94dfbd96ebc669c17abc8bbee521bc8611ad2f086877d372f3451a0608e979
            • MD5 SHA1 SHA512

            BF83.tmp

            • Path C:\ProgramData\BF83.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

            • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
            • Size 145KB
            • SHA256 ada12e1f2b7ee7d8f98d6c3f7fcda34fcd7fb771aa02188ce14d36e67533d6b9
            • MD5 SHA1 SHA512 SSDEEP

            {4F2E4A53-B6B7-44B9-9113-7222982B9280}

            • Path C:\Users\Admin\AppData\Local\Temp\{4F2E4A53-B6B7-44B9-9113-7222982B9280}
            • Size 4KB
            • SHA256 8694722bec382d3e5b3d0afc4af87d670240665c0269b6844f32c66e18a0f1c0
            • MD5 SHA1 SHA512 SSDEEP

            Open Notebook.onetoc2

            • Path C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2
            • Size 4KB
            • SHA256 0eac9203648b4c835b3b000472e5f79b8deda36d0c35aa8ca099f6ea4ddca41f
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDD

            • Path F:\$RECYCLE.BIN\S-1-5-21-513485977-2495024337-1260977654-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 6338e76dfeed939115af38ee3a6bb475ebdc569e73de4aabe8b581dc33570921
            • MD5 SHA1 SHA512

            memory/1628-2717-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/1628-2718-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/1628-2719-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/1628-0-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/1628-2-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/1628-1-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

            memory/4068-2742-0x00007FFC97ED0000-0x00007FFC97EE0000-memory.dmp

            memory/4068-2778-0x00007FFC95710000-0x00007FFC95720000-memory.dmp

            memory/4068-2740-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2741-0x00007FFC97ED0000-0x00007FFC97EE0000-memory.dmp

            memory/4068-2743-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2737-0x00007FFC97ED0000-0x00007FFC97EE0000-memory.dmp

            memory/4068-2754-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2736-0x00007FFC97ED0000-0x00007FFC97EE0000-memory.dmp

            memory/4068-2773-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2774-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2775-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2776-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2777-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2738-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2779-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2780-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2782-0x00007FFC95710000-0x00007FFC95720000-memory.dmp

            memory/4068-2783-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2784-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2785-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2781-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2734-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2732-0x00007FFC97ED0000-0x00007FFC97EE0000-memory.dmp

            memory/4068-2807-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp

            memory/4068-2808-0x00007FFCD7E50000-0x00007FFCD8045000-memory.dmp