Analysis

  • max time kernel
    152s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    18-07-2022 19:26

General

  • Target

    50e4e4a7bc3167441392789c32897736154d552795c9a8bad0d91558eaaf0f7e.dll

  • Size

    5.0MB

  • MD5

    ef308fb6f974a766ab59bb68b1864aa1

  • SHA1

    9a79e44bd36f3405c319255c7a17e3c4ad98fa99

  • SHA256

    50e4e4a7bc3167441392789c32897736154d552795c9a8bad0d91558eaaf0f7e

  • SHA512

    75bc2d6ad9dcd4070f0133f560a4c5ad1bf2050bc70430c71ae7c163f5fa9a42441aebfde143c2aec024752b0e509ce326957f8ba09d9de7336bd49c8b4932dd

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • suricata: ET MALWARE Known Sinkhole Response Kryptos Logic

    suricata: ET MALWARE Known Sinkhole Response Kryptos Logic

  • suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1

    suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1

  • Contacts a large (1303) amount of remote hosts 1 TTPs

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

  • Executes dropped EXE 3 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\50e4e4a7bc3167441392789c32897736154d552795c9a8bad0d91558eaaf0f7e.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1920
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\50e4e4a7bc3167441392789c32897736154d552795c9a8bad0d91558eaaf0f7e.dll,#1
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:1056
      • C:\WINDOWS\mssecsvc.exe
        C:\WINDOWS\mssecsvc.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        PID:1728
        • C:\WINDOWS\tasksche.exe
          C:\WINDOWS\tasksche.exe /i
          4⤵
          • Executes dropped EXE
          PID:2012
  • 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:1640

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Network Service Scanning

1
T1046

Replay Monitor

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Downloads

  • C:\WINDOWS\mssecsvc.exe
    Filesize

    3.6MB

    MD5

    316f0b51bf230dec5310b10fcb289738

    SHA1

    fc8a4d6414d4031123d51db71a6bf1b8a06ab59d

    SHA256

    94bf8ee0f9799d8f17eda2abdebe5b1d98df34a37fea8ce7ee865b043a3ef9f3

    SHA512

    4f84b242429608c7143466e7db908534f413de0a7d69bd61540c302792f40089a7268ae6f0419d80feb8b8d91af1d10d22aecfc904b94fa318e21bf195140a12

  • C:\Windows\mssecsvc.exe
    Filesize

    3.6MB

    MD5

    316f0b51bf230dec5310b10fcb289738

    SHA1

    fc8a4d6414d4031123d51db71a6bf1b8a06ab59d

    SHA256

    94bf8ee0f9799d8f17eda2abdebe5b1d98df34a37fea8ce7ee865b043a3ef9f3

    SHA512

    4f84b242429608c7143466e7db908534f413de0a7d69bd61540c302792f40089a7268ae6f0419d80feb8b8d91af1d10d22aecfc904b94fa318e21bf195140a12

  • C:\Windows\mssecsvc.exe
    Filesize

    3.6MB

    MD5

    316f0b51bf230dec5310b10fcb289738

    SHA1

    fc8a4d6414d4031123d51db71a6bf1b8a06ab59d

    SHA256

    94bf8ee0f9799d8f17eda2abdebe5b1d98df34a37fea8ce7ee865b043a3ef9f3

    SHA512

    4f84b242429608c7143466e7db908534f413de0a7d69bd61540c302792f40089a7268ae6f0419d80feb8b8d91af1d10d22aecfc904b94fa318e21bf195140a12

  • C:\Windows\tasksche.exe
    Filesize

    3.4MB

    MD5

    a2f96631c02d1fb0b0c00c79c065ce6d

    SHA1

    d84bb7084c2e14079ae4413a2701236a943fec96

    SHA256

    f222f489923b30cf69370ab007683866a238e4e125395578a8e50d04ff94b5ee

    SHA512

    9eb48e3b65b2f28fb16ffbc873e863fce48b06eb186d62cd838d72f27a4a5ebe802912869697a0f0f08f658fb6a8e6f24f1c48ec0afee01cec9699c1d20035d6

  • memory/1056-54-0x0000000000000000-mapping.dmp
  • memory/1056-55-0x00000000754C1000-0x00000000754C3000-memory.dmp
    Filesize

    8KB

  • memory/1728-56-0x0000000000000000-mapping.dmp