Analysis

  • max time kernel
    102s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    06-05-2021 12:02

General

  • Target

    Users/valdershof/AppData/Local/Temp/1/Temp1_request (2).zip/statistics.05.05.21.doc

  • Size

    79KB

  • MD5

    5b1f0547ccf84dcbff593f7c8f5942d8

  • SHA1

    3e5a4257f797363211724a83b40b42c84396bf47

  • SHA256

    643ead4ad454664576dd55236b4d924a91294d155315ec8860af96a6157263d4

  • SHA512

    a149e6d4bf6093b3af4fffc14824335a72cff53cea28d27a103f98a450439768ab29f0a532a512364e5b5b726fccb2bc051aaebb145b5ca05680c01c088c7ab6

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Blocklisted process makes network request 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 10 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Users\valdershof\AppData\Local\Temp\1\Temp1_request (2).zip\statistics.05.05.21.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1840
    • C:\Windows\SysWOW64\explorer.exe
      explorer c:\users\public\dataTrustRequest.hta
      2⤵
      • Process spawned unexpected child process
      PID:1648
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:660
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1860
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Public\dataTrustRequest.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1812
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\users\public\dataTrustRequest.jpg,PluginInit
          3⤵
            PID:1404

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Public\dataTrustRequest.hta
        MD5

        8ec163e76fce1f25578d1c05a795b4bc

        SHA1

        08a476eeb1cd6eae7e17331bbbcd1adc44168fc3

        SHA256

        1444d45a93a63b2d305ef991e9e78b05405bfdc5e572e735d4c9a8bf9470dcb1

        SHA512

        c1c481c931dc2f4aa8a17be7dd265b82297ae6641057908581fa1fb09aa5c794335f941833e8f1cbbe0b01e18e07dd614c0a5689cd89d632cb42400799d8cb8a

      • \??\c:\users\public\dataTrustRequest.jpg
        MD5

        e928548c0dfc44ffdb9375da697bd830

        SHA1

        d95d7903f376b4764059f9f9899d3087e4ad30a9

        SHA256

        00a22580287c337e1fa693ada6238c4ba9c12fe1c061d5f1004e86484c9b0dbd

        SHA512

        6ad95233aa5a87ea71684a27e5eadae930f99caa7fc95efffef421eea96a5e9813bde608e2904f08766c7afa6c3e9a8ad3a08b576c33557a5f4e1c9713e71e18

      • memory/660-70-0x0000000000000000-mapping.dmp
      • memory/1404-72-0x0000000000000000-mapping.dmp
      • memory/1648-63-0x0000000000000000-mapping.dmp
      • memory/1648-64-0x0000000074D91000-0x0000000074D93000-memory.dmp
        Filesize

        8KB

      • memory/1648-66-0x000000006AB91000-0x000000006AB93000-memory.dmp
        Filesize

        8KB

      • memory/1812-69-0x0000000000000000-mapping.dmp
      • memory/1840-60-0x0000000072181000-0x0000000072184000-memory.dmp
        Filesize

        12KB

      • memory/1840-65-0x0000000005ED0000-0x0000000006B1A000-memory.dmp
        Filesize

        12.3MB

      • memory/1840-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1840-61-0x000000006FC01000-0x000000006FC03000-memory.dmp
        Filesize

        8KB

      • memory/1840-75-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1860-67-0x000007FEFB681000-0x000007FEFB683000-memory.dmp
        Filesize

        8KB