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Analysis

  • max time kernel
    146s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/11/2024, 14:51

General

  • Target

    Lockbit-Ransomware-Builder-main/Decrypter.exe

  • Size

    146KB

  • MD5

    39c9477cf131ca5ccc05c8871c0e10e6

  • SHA1

    07b2581b2cb41053d09c4bb896aaabc1d28f2a7b

  • SHA256

    939281eac1c6e5aa2e4238a1e545e67b2609c15f517474b2a5133bb64fe9c1eb

  • SHA512

    689fd585232031f746b1573d3ed66ac329420611d4e1092ce6952b49ab0c168091726bd02189a4e183d1196ced4f51953e4eb25a5219a36f86d8f6761da9f129

  • SSDEEP

    1536:xzICS4AAwczUUf8y8gvMH+1zGSNAojMP95D1xDqk3sA9atm8z+L8QBfuSoyAMjwT:KqJogYkcSNm9V7D7352v+L8DnyAewT

Malware Config

Signatures

  • Renames multiple (620) 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 3 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
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 3 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
  • 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\Lockbit-Ransomware-Builder-main\Decrypter.exe
    "C:\Users\Admin\AppData\Local\Temp\Lockbit-Ransomware-Builder-main\Decrypter.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4204
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:2696
    • C:\ProgramData\AD96.tmp
      "C:\ProgramData\AD96.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2836
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\AD96.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2576
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:1360
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:4236
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{CE662DCC-9BC6-44AA-BB4E-B470A4017414}.xps" 133771062834050000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of SetWindowsHookEx
        PID:4880

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-3756129449-3121373848-4276368241-1000\FFFFFFFFFFF

      Filesize

      129B

      MD5

      f014f54dcaac84820be099ce792d4db2

      SHA1

      ed6f8ddb4f9e97caec710e61b922f212ef50ee9a

      SHA256

      6b29db8fa97c1dce54412a34204a2f0bb2be1df92b603e5709c1a42cc83954b2

      SHA512

      5d2949e8c6305be6b576f781f3928d73360658681449f9f48d1989791444b2e0990e07b8f0a092d2a30aedbcdcd6753bff7b2479aaa8f392b4bc3751c3fedec2

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

    • C:\ProgramData\AD96.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • C:\Users\Admin\AppData\Local\Temp\Lockbit-Ransomware-Builder-main\EEEEEEEEEEEEE

      Filesize

      146KB

      MD5

      8cd60b304046b150e1b8213aab6f6ffe

      SHA1

      174d887e3a5ebf72584ef83d539254c4525e76a0

      SHA256

      4a002f538e220ab0546983416ddbd482b81db9a8134c5cb8c310317a728b8f2b

      SHA512

      efe980796e77ed4ebb641f2aa8100777782252402ae26925885fe7ee8e7244b51f6c145c51bdcad244774059c4d0442d69aae6bedb53cc8354059bea3493451f

    • C:\Users\Admin\AppData\Local\Temp\{8B1DA11B-5B4B-46CB-A03D-69E8EE555715}

      Filesize

      4KB

      MD5

      a16df7afc2855efae6978499d80efc44

      SHA1

      118ed290b2f482eddcd44f021406ab765c6ce4ff

      SHA256

      4db3b274849d02a8d9f4ca0c62b4daa2af44a8a5bd69041630b4ab8d723d005a

      SHA512

      bcbd969e93506f3ed65d03eff56e0c2592485bc8fa9c17da5083acbf7460853397cd42b99e5bafd3af7a50e9650ea39e1302f453d1333b36173d185c615a304b

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

      Filesize

      4KB

      MD5

      04b3691eae4c377e2fd3e45e1f866bb0

      SHA1

      51098fe4b8e80f0448becb901f91eefc7e78f376

      SHA256

      93aec52dba7cd311fc1dc874f05203c2197f65bfe60b9f2efbaae63164320634

      SHA512

      679d9ec04f1ffaea16a42101906181a8d333a11fe5d928755fc238c2e68f9ca686c18fb5b8d690f1881da4f2e5c3ca5c75b820c6175450c161eb931477920882

    • F:\$RECYCLE.BIN\S-1-5-21-3756129449-3121373848-4276368241-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      97d216fd5752f88dc67fd597df2e1eed

      SHA1

      e00930fdd87d447be1d6bc62f48c22f8a9514a41

      SHA256

      ed62536857c3a94ba8c9923a510e80c88ce45f210b150695f6497601ecc7cc05

      SHA512

      733e480ad6cd37fa5b5205d3764dcc2059ae4a35e24a5516edaea6be029e6844d508332b9779b47b5ff3272a6ef2302e66d623a6b6f28a707d9c2a60251e7093

    • memory/4204-0-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4204-2799-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4204-2800-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4204-1-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4204-2801-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4204-2-0x0000000002D20000-0x0000000002D30000-memory.dmp

      Filesize

      64KB

    • memory/4880-2818-0x00007FFA27450000-0x00007FFA27460000-memory.dmp

      Filesize

      64KB

    • memory/4880-2817-0x00007FFA27450000-0x00007FFA27460000-memory.dmp

      Filesize

      64KB

    • memory/4880-2816-0x00007FFA27450000-0x00007FFA27460000-memory.dmp

      Filesize

      64KB

    • memory/4880-2820-0x00007FFA27450000-0x00007FFA27460000-memory.dmp

      Filesize

      64KB

    • memory/4880-2821-0x00007FFA27450000-0x00007FFA27460000-memory.dmp

      Filesize

      64KB

    • memory/4880-2850-0x00007FFA251F0000-0x00007FFA25200000-memory.dmp

      Filesize

      64KB

    • memory/4880-2851-0x00007FFA251F0000-0x00007FFA25200000-memory.dmp

      Filesize

      64KB