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Analysis

  • max time kernel
    74s
  • max time network
    35s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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 (376) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • 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.

  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 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⤵
    • Loads dropped DLL
    • 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:1276
    • C:\ProgramData\A9C7.tmp
      "C:\ProgramData\A9C7.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:2624
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\A9C7.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1592
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x150
    1⤵
      PID:2840

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\$Recycle.Bin\S-1-5-21-3692679935-4019334568-335155002-1000\WWWWWWWWWWW

      Filesize

      129B

      MD5

      cac569d48f4c770ac97fb65fc0f98f59

      SHA1

      9f4f7afd61526a9c6ffb17775c2a11ba1b16289f

      SHA256

      f5ab6bb0ae3ba2c773796e734ba6001661aae077b59e1059e9d25913e829a454

      SHA512

      cb8d962f7dcf5e1d505f005a2d38acc90be8ab3abd6d7ecc5e571a2e1ff583987662c077942428fb91433aed7aa42adfbb69656d3182cb429cc8f33741a843e0

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

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

      Filesize

      146KB

      MD5

      1abd78af8a33b5e6ad6582aeb0613be5

      SHA1

      f180b605cef8910bd3e0d2af680eb95533b84712

      SHA256

      ef58a1bbdcde2b78798d71cab781a9f8cca59becc6c029d9fa1260c40f877fee

      SHA512

      72635fe7c80c8cad833eb60662b51a5dabab6ec9e7c44c9055446f9e1ace3f4ccf4bbe42ff17c65113bff9b274ce761e9547ce4ffea77360e2fec6be6d40b59e

    • F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      65fa57dea1fe539698a8aef16303225b

      SHA1

      8d0b85588c750ca255f9eb2c767de22261e17a12

      SHA256

      74a2018469545a8812a693a0671b2996921c356c057505cb152ee326f7e887b7

      SHA512

      172812c5a8af1a8bdb9f73b1dfb8aea9aa79308cdc16a1697ab459d43bd55b36aecb3b49b033d72cd1f49fe12e2f2b757369212072648b3b9ac0d6cedb86d938

    • \ProgramData\A9C7.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • memory/1276-0-0x0000000000960000-0x00000000009A0000-memory.dmp

      Filesize

      256KB

    • memory/2624-903-0x0000000000401000-0x0000000000404000-memory.dmp

      Filesize

      12KB

    • memory/2624-907-0x0000000000400000-0x0000000000407000-memory.dmp

      Filesize

      28KB

    • memory/2624-906-0x0000000000400000-0x0000000000407000-memory.dmp

      Filesize

      28KB

    • memory/2624-905-0x0000000000400000-0x0000000000407000-memory.dmp

      Filesize

      28KB