Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    20/07/2022, 07:36

General

  • Target

    44ffe5af1ebae5b83a835fe078be7cb6.dll

  • Size

    5.0MB

  • MD5

    44ffe5af1ebae5b83a835fe078be7cb6

  • SHA1

    bf273adfd3b00dcbfa17c55cc680cc8c56b08e01

  • SHA256

    a2b0df0948c4b5aa93c02230a3931977bba30b3877f20929ed7d2a580b3cfe06

  • SHA512

    ddca273e57e55ef740d20c639a8b13c1e3b7c5909e3d8af90b8270c863a0bd3a34118558f2a4979f34f6d97a266152ee8004ac9c3fedcc569aa320f91d677457

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (1250) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Modifies data under HKEY_USERS 24 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\44ffe5af1ebae5b83a835fe078be7cb6.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:852
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\44ffe5af1ebae5b83a835fe078be7cb6.dll,#1
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:1956
      • C:\WINDOWS\mssecsvr.exe
        C:\WINDOWS\mssecsvr.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        PID:1504
  • C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe -m security
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    PID:1484

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\WINDOWS\mssecsvr.exe

          Filesize

          2.2MB

          MD5

          b3c138999310f32073b22352d1c7abaf

          SHA1

          0bc0bb28bcbba4d0c6fb1efa4427e7bb8b260d3d

          SHA256

          e0f06ba9c8c372f2423cef016ef33c61c55e502a4819b20d801ec3883585e62b

          SHA512

          a7c1d3496d4d7a00c1ba764572fdd5eaf888ee31629bf0ad27397556923ca629d2a32fe371004529193bab59ae1d43167ffd4c361164759c894c36f343578254

        • C:\Windows\mssecsvr.exe

          Filesize

          2.2MB

          MD5

          b3c138999310f32073b22352d1c7abaf

          SHA1

          0bc0bb28bcbba4d0c6fb1efa4427e7bb8b260d3d

          SHA256

          e0f06ba9c8c372f2423cef016ef33c61c55e502a4819b20d801ec3883585e62b

          SHA512

          a7c1d3496d4d7a00c1ba764572fdd5eaf888ee31629bf0ad27397556923ca629d2a32fe371004529193bab59ae1d43167ffd4c361164759c894c36f343578254

        • C:\Windows\mssecsvr.exe

          Filesize

          2.2MB

          MD5

          b3c138999310f32073b22352d1c7abaf

          SHA1

          0bc0bb28bcbba4d0c6fb1efa4427e7bb8b260d3d

          SHA256

          e0f06ba9c8c372f2423cef016ef33c61c55e502a4819b20d801ec3883585e62b

          SHA512

          a7c1d3496d4d7a00c1ba764572fdd5eaf888ee31629bf0ad27397556923ca629d2a32fe371004529193bab59ae1d43167ffd4c361164759c894c36f343578254

        • memory/1956-55-0x0000000076021000-0x0000000076023000-memory.dmp

          Filesize

          8KB