Analysis

  • max time kernel
    17s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09-11-2020 20:43

General

  • Target

    y.rb.dll

  • Size

    421KB

  • MD5

    838c6c76b5f43793ba6a966ff3cfe1bf

  • SHA1

    e3e98f6f780c54a86af046a8612b984dbbe16a24

  • SHA256

    4f61fcafad37cc40632ad85e4f8aa503d63700761e49db19c122bffa7084e4ec

  • SHA512

    cc09c8b79f082046341adc5142ac9c22eea8ef3941d703b3f03a9a3cedf59920eeebfe83d89a6ee8e074ec7168156208b461a18f66c5ceb80b6d6def36eab6be

Score
10/10

Malware Config

Extracted

Family

ursnif

Attributes
  • dga_base_url

  • dga_crc

    0

  • dga_season

    0

  • dga_tlds

  • dns_servers

Signatures

  • Ursnif, Dreambot

    Ursnif is a variant of the Gozi IFSB with more capabilities.

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\y.rb.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4768
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\y.rb.dll,#1
      2⤵
        PID:4780
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4780 -s 628
          3⤵
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3680

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/3680-2-0x00000000045E0000-0x00000000045E1000-memory.dmp

      Filesize

      4KB

    • memory/3680-8-0x0000000004960000-0x0000000004961000-memory.dmp

      Filesize

      4KB

    • memory/4780-0-0x0000000000000000-mapping.dmp

    • memory/4780-1-0x0000000002E70000-0x0000000002E80000-memory.dmp

      Filesize

      64KB

    • memory/4780-3-0x0000000000000000-mapping.dmp

    • memory/4780-4-0x0000000000000000-mapping.dmp

    • memory/4780-5-0x0000000000000000-mapping.dmp

    • memory/4780-6-0x0000000000000000-mapping.dmp