Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18-05-2024 23:04

General

  • Target

    574ca7876c6d4a640035f91c1665a633_JaffaCakes118.dll

  • Size

    5.0MB

  • MD5

    574ca7876c6d4a640035f91c1665a633

  • SHA1

    bf051dfcfa4520d1d9c2f40b630efc290a93323b

  • SHA256

    36ddc266209e3cb092e6157b382d1bd32921e0e71cc32a235a404de528f2050b

  • SHA512

    9100f561596a80b522ffaf4253be0a10656eef6cdb547e2c874fb4341a3b1c57791be01030a070a2e96d397141b74776a530baa9b8922aaee3670d9c49badd82

  • SSDEEP

    24576:SbLgddQhfdmMSirYbcMNgef0QeQjGG6SASk+K:SnAQqMSPbcBVQejG6SAA

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3120) 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\574ca7876c6d4a640035f91c1665a633_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\574ca7876c6d4a640035f91c1665a633_JaffaCakes118.dll,#1
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:2732
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        PID:2220
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:2072
  • 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:2552

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvc.exe

    Filesize

    3.6MB

    MD5

    ca4c9af1e5dc25e629f4c72154cf0d44

    SHA1

    09b93333b9f7989b5979bea585eb7e59a663a47f

    SHA256

    345fd855ff8608186c7ae47415224c9b5f03cbce5a7ba849271d642085964084

    SHA512

    5ca005295f49bec90dde2c9363c02ca495084157f9bdf323cd3f9e45d01b1b066923b1c6d43ed580b83d6608af621f5e162d78ac88815c028f03aaebd62c37c8

  • C:\Windows\tasksche.exe

    Filesize

    3.4MB

    MD5

    075cea82e165f698cecb8cae2b1bf4b4

    SHA1

    010c89c9b60e434d435e86090325e5d6122bc713

    SHA256

    66b9d9b81dee9122091495f6e4134045aa5e4f03fa4ace78029801bc7ff8d7ea

    SHA512

    eccdc523aee3bcf0dbb9a7d7f2bd3d900c7855aaf639ecdf803c7f161e9fe40b122c594b34770ede6203828893d067377caf44277c78fba18641e7381ab069d4