Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    19-05-2024 17:50

General

  • Target

    5aaa734ecd61d2a8faf15c843cd86709_JaffaCakes118.dll

  • Size

    5.0MB

  • MD5

    5aaa734ecd61d2a8faf15c843cd86709

  • SHA1

    5f796929bc7301c15c7e80b6ad232c8076c99de1

  • SHA256

    d7a72ff750c8efe9e3e5fb8fddd60c250b3cab76118ac835ea306e1e9f830412

  • SHA512

    ca720bc29b066b4c29bb48047af0b97fe7275a94ad4f41a97b102383c254211481da8c8bb23c249214732896580f7c1886da0101fe7597b598c427faaf136ea9

  • SSDEEP

    49152:SnAQqMSPbcBVQej/1INRx+TSqTdd1HkQ:+DqPoBhz1aRxcSUZk

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3280) amount of remote hosts 1 TTPs

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

  • Executes dropped EXE 3 IoCs
  • Creates a large amount of network flows 1 TTPs

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

  • 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\5aaa734ecd61d2a8faf15c843cd86709_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\5aaa734ecd61d2a8faf15c843cd86709_JaffaCakes118.dll,#1
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:2904
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        PID:2368
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:2812
  • C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe -m security
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    PID:2984

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvc.exe

    Filesize

    3.6MB

    MD5

    cabd09bbf6e65a38851007c1fa84b3c0

    SHA1

    6a0f1aff1e9ca5c8cceb6e385b96f2fcafd2a1f7

    SHA256

    6e5334295a211e1ba5639c7688747397ea3dc63789dbd41c800b6daa5fc021d5

    SHA512

    aa85a0886debbccc28251b9c900e14ead86cf94ed9e83405a5d3c207e4ec001cf66e511baf652c86e3c8570364988e925f70f35c938dda5702bc94ac8c05572c

  • C:\Windows\tasksche.exe

    Filesize

    3.4MB

    MD5

    e7777114d041dc7bb21c7dbe47d25b08

    SHA1

    0f849ab7d459137d33f6bdd001333bd7f2e255a1

    SHA256

    9f891d4df21a14f582ef00570c3f358daafd44c1b72c30e24c3ec87ad89c9472

    SHA512

    320b4442bda23bd96bd844d5de71a36cd21ab77cfcee9006a3f2905dffa3ca29f968a239f777b1df057bd8ac563db75e5aefd55ca8ff0c080b2780c2d34bad5f