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Analysis

  • max time kernel
    149s
  • max time network
    149s
  • 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/Builder.exe

  • Size

    146KB

  • MD5

    39c9477cf131ca5ccc05c8871c0e10e6

  • SHA1

    07b2581b2cb41053d09c4bb896aaabc1d28f2a7b

  • SHA256

    939281eac1c6e5aa2e4238a1e545e67b2609c15f517474b2a5133bb64fe9c1eb

  • SHA512

    689fd585232031f746b1573d3ed66ac329420611d4e1092ce6952b49ab0c168091726bd02189a4e183d1196ced4f51953e4eb25a5219a36f86d8f6761da9f129

  • SSDEEP

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

Malware Config

Signatures

  • Renames multiple (599) 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:2476
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:3156
    • C:\ProgramData\FD6C.tmp
      "C:\ProgramData\FD6C.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:3112
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\FD6C.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4452
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:1104
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:4144
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{56CF2521-BBA7-4D0C-BE53-8D3B0A7268AA}.xps" 133771062863770000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of SetWindowsHookEx
        PID:1728

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\$Recycle.Bin\S-1-5-21-2045521122-590294423-3465680274-1000\desktop.ini

      Filesize

      129B

      MD5

      ba0d0e55e055297a7c621edd3be3d214

      SHA1

      2dc5caf3842a974157bc25aff46df438285eb82d

      SHA256

      92e5b285bf1d4ab78237d82b9165bcf934a955113817f3f8044c162403114beb

      SHA512

      49452b1e48161401c0523b4fd846404c0ff80b4a56eb3b237a4a0538fb1c600e0a937779b8c5faa45d6cb379995c962acc41b96fce762d1814ae098e2288fb72

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

    • C:\ProgramData\FD6C.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

      d48e457eec034676ca79dd4f8652bd18

      SHA1

      89bd106f73e6a7392fca8e8e8628d59cda60fd00

      SHA256

      1961ec3d67fcd1a3e6604f3f8c8c9208d2c8fd7c290ec2f91a85a23d28dd8280

      SHA512

      6739cd0145aad255560d7f7be7ff821a878c90826134cc1c4c8e5c2d81c24b7fcf2f41127c414f048d322d8918e6943ce2bc4ff09f27afda6dad57e23304631c

    • C:\Users\Admin\AppData\Local\Temp\{329C1F3B-A38C-4B76-8734-69AA9CA032A4}

      Filesize

      4KB

      MD5

      acd4250b7b896ae2fbcba5ea41888119

      SHA1

      31e52093800e9dba8f9cebca6097bbbed5cab29c

      SHA256

      fc47cdbb62b4d34cf1208bc7319437cb3495cf35627f53e061a06be8105ebc31

      SHA512

      ad27b27832dbfeed03d201c94109542df44792c7a2993395ccad0bd9a9bddd82396497467f41416a1b50b7615098909aac6ac17726db3cbda1acee98ef807106

    • F:\$RECYCLE.BIN\S-1-5-21-2045521122-590294423-3465680274-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      57ea9164f86627cf1af50891d086aa0d

      SHA1

      31a56e1bb9868983aae7fa9f43ff7aa48061b5ed

      SHA256

      f8a18cc61a4cdea2fff3c560616c816bf0a4089c3d3b685469611c064d5023b6

      SHA512

      1c787546bf19ef6c32d62f09c7cdf51605e52c3e1735a290efd474cadbeb65c0f8d527f78bdc15ad0569684ebe0ca04346669f7f3a433960644b5641ea987044

    • memory/1728-2955-0x00007FF851FF0000-0x00007FF852000000-memory.dmp

      Filesize

      64KB

    • memory/1728-2953-0x00007FF851FF0000-0x00007FF852000000-memory.dmp

      Filesize

      64KB

    • memory/1728-2956-0x00007FF851FF0000-0x00007FF852000000-memory.dmp

      Filesize

      64KB

    • memory/1728-2954-0x00007FF851FF0000-0x00007FF852000000-memory.dmp

      Filesize

      64KB

    • memory/1728-2957-0x00007FF851FF0000-0x00007FF852000000-memory.dmp

      Filesize

      64KB

    • memory/1728-2986-0x00007FF84FBB0000-0x00007FF84FBC0000-memory.dmp

      Filesize

      64KB

    • memory/1728-2987-0x00007FF84FBB0000-0x00007FF84FBC0000-memory.dmp

      Filesize

      64KB

    • memory/2476-2936-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB

    • memory/2476-2937-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB

    • memory/2476-2935-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB

    • memory/2476-0-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB

    • memory/2476-2-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB

    • memory/2476-1-0x0000000001410000-0x0000000001420000-memory.dmp

      Filesize

      64KB