Analysis

  • max time kernel
    163s
  • max time network
    174s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/03/2024, 09:01

General

  • Target
    01bf78841b63bcdd8280157c486b45ad74811c0251140a054de81a925ce7f716.exe
  • Size 145KB
  • Sample240318-ky38dadf6s
  • SHA256 01bf78841b63bcdd8280157c486b45ad74811c0251140a054de81a925ce7f716
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (737) 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
  • 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
  • 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
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\01bf78841b63bcdd8280157c486b45ad74811c0251140a054de81a925ce7f716.exe
    "C:\Users\Admin\AppData\Local\Temp\01bf78841b63bcdd8280157c486b45ad74811c0251140a054de81a925ce7f716.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4000
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:1820
    • C:\ProgramData\EB80.tmp
      "C:\ProgramData\EB80.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:608
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\EB80.tmp >> NUL
        3⤵
          PID:1232
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1496
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:852
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
        1⤵
          PID:2384
        • C:\Windows\system32\printfilterpipelinesvc.exe
          C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
          1⤵
          • Drops file in System32 directory
          • Suspicious use of WriteProcessMemory
          PID:4644
          • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
            /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{2AFAC22C-97B3-4D3F-97C0-F5C670B92722}.xps" 133552262277120000
            2⤵
            • Checks processor information in registry
            • Enumerates system info in registry
            • Suspicious use of SetWindowsHookEx
            PID:1408

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              desktop.ini

              • Path C:\$Recycle.Bin\S-1-5-21-3808065738-1666277613-1125846146-1000\desktop.ini
              • Size 129B
              • SHA256 ae647b0104bf534e09b39722f2c03a07dc157ed5ed45ef7b6eb0f7d1bc3b5873
              • MD5 SHA1 SHA512

              EB80.tmp

              • Path C:\ProgramData\EB80.tmp
              • Size 14KB
              • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
              • MD5 SHA1 SHA512 SSDEEP

              DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

              • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
              • Size 145KB
              • SHA256 008ea735cd8cae0e1a8dfdf042f9e6ff3f700a9096eab571b15fcae8a40eb58c
              • MD5 SHA1 SHA512 SSDEEP

              {102FF17C-F932-43D0-903D-07A36096EBB5}

              • Path C:\Users\Admin\AppData\Local\Temp\{102FF17C-F932-43D0-903D-07A36096EBB5}
              • Size 4KB
              • SHA256 1840defbc4ed2ca99c2eeaf54d27a54d0bfa02165d1148b6b4bc18303b6fd92f
              • MD5 SHA1 SHA512 SSDEEP

              fKwlk4hj5.README.txt

              • Path C:\fKwlk4hj5.README.txt
              • Size 629B
              • SHA256 5b1cd3fb03117987e4c51a67cd101796451f15babfacb9c9c2832908229d358c
              • MD5 SHA1 SHA512

              DDDDDDDDDDD

              • Path F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\DDDDDDDDDDD
              • Size 129B
              • SHA256 698f5efc76783e5cad2dfb293e36a6cd946f22dc4464123f3c94e9567a14f42a
              • MD5 SHA1 SHA512

              memory/608-2964-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

              memory/608-2962-0x000000007FE20000-0x000000007FE21000-memory.dmp

              memory/608-2973-0x000000007FE00000-0x000000007FE01000-memory.dmp

              memory/608-2972-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

              memory/608-2921-0x000000007FE40000-0x000000007FE41000-memory.dmp

              memory/608-2930-0x00000000024D0000-0x00000000024E0000-memory.dmp

              memory/608-2934-0x00000000024D0000-0x00000000024E0000-memory.dmp

              memory/1408-2967-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2970-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2963-0x00007FFD1F2D0000-0x00007FFD1F2E0000-memory.dmp

              memory/1408-3000-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2931-0x00007FFD1F2D0000-0x00007FFD1F2E0000-memory.dmp

              memory/1408-2979-0x00007FFD1CD90000-0x00007FFD1CDA0000-memory.dmp

              memory/1408-2965-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2966-0x00007FFD1F2D0000-0x00007FFD1F2E0000-memory.dmp

              memory/1408-2978-0x00007FFD1CD90000-0x00007FFD1CDA0000-memory.dmp

              memory/1408-2968-0x00007FFD1F2D0000-0x00007FFD1F2E0000-memory.dmp

              memory/1408-2969-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2944-0x00007FFD1F2D0000-0x00007FFD1F2E0000-memory.dmp

              memory/1408-2977-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2971-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2976-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2974-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/1408-2975-0x00007FFD5F250000-0x00007FFD5F445000-memory.dmp

              memory/4000-1031-0x00000000032E0000-0x00000000032F0000-memory.dmp

              memory/4000-1026-0x00000000032E0000-0x00000000032F0000-memory.dmp

              memory/4000-1027-0x00000000032E0000-0x00000000032F0000-memory.dmp

              memory/4000-0-0x00000000032E0000-0x00000000032F0000-memory.dmp

              memory/4000-1-0x00000000032E0000-0x00000000032F0000-memory.dmp

              memory/4000-2-0x00000000032E0000-0x00000000032F0000-memory.dmp