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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2025, 14:43

General

  • Target

    775930a062cfe16caf9a56513d142262.dll

  • Size

    5.0MB

  • MD5

    775930a062cfe16caf9a56513d142262

  • SHA1

    ebc7f59387f5b121795b3c3bc37bc77c566baf7b

  • SHA256

    c5eeafb62d5b0fce524e12ad5a94f7e221636dc1bfc8622c8d7e0e61bc0950f8

  • SHA512

    7b5a61545b21ea5f477d86df7af8d53951011f3b062db09a5defb053716bb2bb619c53b5111ddcadba5047029fb41da2cdf3d95ab49466ed33428f372fe98f48

  • SSDEEP

    49152:RnnMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhHE:1nPoBhz1aRxcSUDk36SAEdhk

Malware Config

Signatures

  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Wannacry family
  • Contacts a large (3222) amount of remote hosts 1 TTPs

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

  • Executes dropped EXE 2 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 5 IoCs
  • Drops file in Windows directory 2 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 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\775930a062cfe16caf9a56513d142262.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2120
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\775930a062cfe16caf9a56513d142262.dll,#1
      2⤵
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2504
      • C:\WINDOWS\mssecsvr.exe
        C:\WINDOWS\mssecsvr.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:1668
  • C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe -m security
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    PID:1724

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\mssecsvr.exe

    Filesize

    2.2MB

    MD5

    e916117384c8250971067d18f2734f8b

    SHA1

    49515862ad32a93804f787671a4eff3d0ebf6fc8

    SHA256

    09e05a106716c7a1994bc60185129c57a865f378468dfd223e424b51de1fcbe9

    SHA512

    b6e887f017086f2a578a2e82d37749632aa6e11c1c95650d818b3d381aa53be24eceab0358b8e64760df2ec17bfa3647db64b1bf50e7b69da14641c3d3bd8ca3