Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    20/09/2024, 09:34

General

  • Target

    Worm.Win32.Ludbaruma.exe

  • Size

    91KB

  • MD5

    873ef5c05d08ea689a7089b2587d2330

  • SHA1

    9aba971d627abf02ea1e0b00600912eb0f8626a5

  • SHA256

    806ff5a4291ace6371cfa09d584567b7d652d7b28c167a5ab9c4115e9aa4e1f7

  • SHA512

    f92df22b69780ace53fbe815b066b3dbaabe56b4f697375c6627be513ef6799f05eeb70ced00bde6c05836bd8dfb467044889af33cd37d2abf699d3aecba9b15

  • SSDEEP

    1536:FAwEmBGz1lNNqDaG0PoxhlzmnAwEmBGz1lNNqDaG0Poxhlzm/:FGmUXNQDaG0A8nGmUXNQDaG0A8/

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 12 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Modifies Control Panel 4 IoCs
  • Modifies registry class 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Worm.Win32.Ludbaruma.exe
    "C:\Users\Admin\AppData\Local\Temp\Worm.Win32.Ludbaruma.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies visibility of file extensions in Explorer
    • Modifies visiblity of hidden/system files in Explorer
    • Disables RegEdit via registry modification
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2532
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1880
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2952
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3032
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2864
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2816
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1512
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE

    Filesize

    91KB

    MD5

    33320b8ac5b0a32ecd7976d812119481

    SHA1

    3439aa0b0235208b50ba73ae13becc654e2c2682

    SHA256

    a754f08354021856437b23d2cf0526d842b943587c7cb2922968e537a7ee2741

    SHA512

    f4f2256dbd066c8f03714d2342c88a84647a9b0c1e8a8b26cbf0ad91e6b5cd9187d1c2f78e8187ec129fede9ae8d23462e6e46f76a0e634624c6dced31e9cde0

  • C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE

    Filesize

    91KB

    MD5

    9ed08bafcfeff26c17051aa0897e984c

    SHA1

    8aae098f663168b762f0d5965c54095674e9b145

    SHA256

    9d6d7624b308169ab1cae8b158e835eb75ad772c19a66f15daa3d738bf6f673b

    SHA512

    c07effd6a08df903e8cc8caf95966b039f8b96939222292a291d930b9eba383858a98921aa097cba05f509509f49376d269c2497694c5b20d8d4766fa9450458

  • C:\Users\Admin\AppData\Local\winlogon.exe

    Filesize

    91KB

    MD5

    873ef5c05d08ea689a7089b2587d2330

    SHA1

    9aba971d627abf02ea1e0b00600912eb0f8626a5

    SHA256

    806ff5a4291ace6371cfa09d584567b7d652d7b28c167a5ab9c4115e9aa4e1f7

    SHA512

    f92df22b69780ace53fbe815b066b3dbaabe56b4f697375c6627be513ef6799f05eeb70ced00bde6c05836bd8dfb467044889af33cd37d2abf699d3aecba9b15

  • C:\Windows\xk.exe

    Filesize

    91KB

    MD5

    460781b2d17be77924bfb63aedecd164

    SHA1

    3f4d3f96bfd213463b501e3c11319fd1a89c2eb9

    SHA256

    ced6252cebba54453019cd4b16e0d34ac5d8b2cd33b64e716f37c760fcda7ea9

    SHA512

    743f16076cd1f0d914bf1c6ccf21361e57e219b2c08e2050d44e96e978e20815d4b1b6e23392f1a4938923382b42139ce780432ea34cc6b9589e10b3d7f82d29

  • \Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE

    Filesize

    91KB

    MD5

    976abd81a9b9ca10612d52722d232d8e

    SHA1

    daab0abd44ca9583b948a62befec0d11d97406ec

    SHA256

    39a4da7c50cf53c8006bb792466c04050e8d2fe4ef2827acb89680063d94f973

    SHA512

    0c04b928b05e0cf9468a10b47f7c6ab036f9d7f30f114966493b7c6f51b84bdc1d4e35418f1546dfa39010c53041a2dc8e7d8fc60d4fa478192b84f083b0c06e

  • \Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE

    Filesize

    91KB

    MD5

    fa0e61ae22461d260560afd3a4b496fd

    SHA1

    44f79cdce72c73227c4d5841a3da0b8781337b96

    SHA256

    f27c52e434f567b0c5e78dd1790c48b7c88add88cc2c169f91cf4153911422d4

    SHA512

    cfce97abb4b01ee106574c15aae8d60071598e8db8fa716f9ecad16af057bd2573131d29c1cb0b135fd33d6a00006ed8e59c6b6d664a5c1746d0dc3f08beea4f

  • \Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE

    Filesize

    91KB

    MD5

    4e2293e407e0747ccd820ce7b14b9bed

    SHA1

    c21683e160874c2a17bc23ec35eee8c6f8ab44b3

    SHA256

    f0082608fa6d51c1570a2833a9118edcef9369b3afa18d719864192cd76d8649

    SHA512

    f900cbd7306ef73ac7495348d9f3cb13819a58df2df638ddedf26af07026411f85c1ae0f516a9a29f651500a333bf95ed3e574c8d065011a08bd3764c1e64bec

  • \Windows\SysWOW64\IExplorer.exe

    Filesize

    91KB

    MD5

    5705e84ec3289fa94643be6473773675

    SHA1

    324d2a74262a36fa6e3efae70385a30fab41dace

    SHA256

    d791fa1c6f5f7f324165f74fb29b11456e627b5acadc56753eff09a1fa95e0ad

    SHA512

    08fec9a735bfacbedddd0fbc94367f45f05c65c3ee2f8eeafdc209088fd051e7426203a810e0dd258a2c03a17fe0380621f1303d1e39af0256a36c93359c7c14

  • memory/1512-174-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/1752-186-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/1880-114-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2532-133-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-140-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2532-169-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-145-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-181-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-121-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-188-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2532-0-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2532-109-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2532-170-0x0000000002620000-0x000000000264E000-memory.dmp

    Filesize

    184KB

  • memory/2816-162-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2816-158-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2864-150-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2952-126-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/2952-123-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB

  • memory/3032-137-0x0000000000400000-0x000000000042E000-memory.dmp

    Filesize

    184KB