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Analysis

  • max time kernel
    93s
  • max time network
    150s
  • 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, 14:21

General

  • Target

    Lockbit-Ransomware-Builder-main/Builder.exe

  • Size

    146KB

  • MD5

    39c9477cf131ca5ccc05c8871c0e10e6

  • SHA1

    07b2581b2cb41053d09c4bb896aaabc1d28f2a7b

  • SHA256

    939281eac1c6e5aa2e4238a1e545e67b2609c15f517474b2a5133bb64fe9c1eb

  • SHA512

    689fd585232031f746b1573d3ed66ac329420611d4e1092ce6952b49ab0c168091726bd02189a4e183d1196ced4f51953e4eb25a5219a36f86d8f6761da9f129

  • SSDEEP

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

Malware Config

Signatures

  • Renames multiple (658) 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\Builder.exe
    "C:\Users\Admin\AppData\Local\Temp\Lockbit-Ransomware-Builder-main\Builder.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:780
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:1380
    • C:\ProgramData\CC2A.tmp
      "C:\ProgramData\CC2A.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:6004
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\CC2A.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1108
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:5644
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:5808
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{8B66BF55-0B82-4FE9-B626-705E2A7AB3E0}.xps" 133771044979130000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of SetWindowsHookEx
        PID:5916

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-4050598569-1597076380-177084960-1000\desktop.ini

      Filesize

      129B

      MD5

      07ee9593ee876ce3cbf4ff8ad7ddbc65

      SHA1

      dd9bfb7d36a5d390d98325d5a38f16a7f666ba1d

      SHA256

      c263c2f22c2efb9dcd3e245ae45bed4afb3565c9b0ef2acdf2def2b183f26eca

      SHA512

      87d7d1643d13f7eabf9889f0e238c5cd261eabc3fca0ad3c55bbffdc3e766af8aa0db57c8e2d2a32c4abe648fdaf504b4b2ca8d1d4707e9743f26588ed779319

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

    • C:\ProgramData\CC2A.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

      Filesize

      146KB

      MD5

      d5f75b90ff7af56a0f89098c24335274

      SHA1

      70dfa8d6c46462be463d957a0ca732cbc04b7630

      SHA256

      73f9401379cc5526680bd1ee5c7446f26a817500eda471e56f2da7bfff8576ce

      SHA512

      0215763806f52aeee4fc578df63cc79090e9989304d700567b13371b24f259b7f246627f0e62f94b0027b44d70c2f4f8d1a4941f13e621e2d3bc7ffabb0d2091

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

      Filesize

      4KB

      MD5

      acb651af8a46b15ec3091c1672fb9811

      SHA1

      760137796cffa20409c11b087d4a7c36e3270996

      SHA256

      d8b799a913d4495df31675b6ad024ca0ccea0a0c5377bbd1b9195459657bf8c7

      SHA512

      ceaeec010a0bfc197ed1d58a69c25b099d9d4e214253df4cdc8e2c54cdabfd9ddf500afbfd8a130fbb2a332dda7c14bb9d48ab71fbacb91ebbdb8f5210e3183b

    • F:\$RECYCLE.BIN\S-1-5-21-4050598569-1597076380-177084960-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      021d55011415b571de7aaf448021e606

      SHA1

      d1271e9c37a00760bad93c940e5d2d4e2e2557c4

      SHA256

      85b5d584753986096a3cc05630c4fe3179323c313efd242d6a7c8345daff1ca3

      SHA512

      960d3e1e7c339568cc330ce38d8c04aeda965aece5d59f99d4cc18831f5a1186a9170d3df3c73121a9712fa569338dcca4d946bb063aeeab0e462fb0ecb1a16e

    • memory/780-2841-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/780-2843-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/780-1-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/780-2842-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/780-2-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/780-0-0x00000000005A0000-0x00000000005B0000-memory.dmp

      Filesize

      64KB

    • memory/5916-2857-0x00007FF9482F0000-0x00007FF948300000-memory.dmp

      Filesize

      64KB

    • memory/5916-2856-0x00007FF9482F0000-0x00007FF948300000-memory.dmp

      Filesize

      64KB

    • memory/5916-2855-0x00007FF9482F0000-0x00007FF948300000-memory.dmp

      Filesize

      64KB

    • memory/5916-2858-0x00007FF9482F0000-0x00007FF948300000-memory.dmp

      Filesize

      64KB

    • memory/5916-2859-0x00007FF9482F0000-0x00007FF948300000-memory.dmp

      Filesize

      64KB

    • memory/5916-2864-0x00007FF946150000-0x00007FF946160000-memory.dmp

      Filesize

      64KB

    • memory/5916-2893-0x00007FF946150000-0x00007FF946160000-memory.dmp

      Filesize

      64KB