Resubmissions

08-03-2023 09:30

230308-lgp5vsef5w 10

08-03-2023 09:27

230308-lew6dsef4y 10

Analysis

  • max time kernel
    144s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08-03-2023 09:30

General

  • Target

    Tax invoice.docx

  • Size

    10KB

  • MD5

    0280da14a9c30f3a8fabc835cff76ff7

  • SHA1

    d545b4b433e69fcc8659e658e9d4d7cd9e279b2a

  • SHA256

    e7a224a7b64351a65ea657f2382500c5a5b6f52acb3771105f3f73ecd1245c40

  • SHA512

    340044a30f55b8fa2a2469738f0ae7a93313f792142fa2473434dc9e50e044a049919373be44cbc9b2e73a33e2cc10571c59ac4519377c799f4d59cd62f6ad1b

  • SSDEEP

    192:ScIMmtP1aIG/bslPL++uOeml+CVWBXJC0c3Ze:SPXU/slT+LOemHkZC9M

Score
7/10

Malware Config

Signatures

  • Abuses OpenXML format to download file from external location 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 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\Tax invoice.docx"
    1⤵
    • Abuses OpenXML format to download file from external location
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1136

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\FSD-{DE6ACC74-E4D2-44FF-8690-5D91E33C816C}.FSD
      Filesize

      128KB

      MD5

      5845a8c3b47fc1b49610ab54c2772362

      SHA1

      3279af364ebc78fa6d802178efed85ac2856b33f

      SHA256

      56b387fdf7cac9a926ba5ae395bcd5ec827d6b9ac2c8f674fe9f09ac1d860a75

      SHA512

      453ce189883f8fd2ca856f9d517bd365327ceedbab50c695825966469d204834f59fe9bedcd229205bb548ff4f95e26e48ae822e6c94bae9c1a1e7bfcdc040c5

    • C:\Users\Admin\AppData\Local\Microsoft\Office\14.0\OfficeFileCache\LocalCacheFileEditManager\FSD-CNRY.FSD
      Filesize

      128KB

      MD5

      b4f98f8b7417f8452d32bc8bf60e0aaf

      SHA1

      49c61581c8423b7bee747c1f45afe90fb14c0c33

      SHA256

      604f6b760a53f7ea8967be3bb63dd4c4b3bc68330016e2318fb731a2af71426a

      SHA512

      59a33285facf8957301e3fc4f188ff696ae3082cb455e0ca1675f97755793af507cfe4af62cffbb70ae648817d07f4c0e004e5d68ca729466a92dd8fc199f848

    • C:\Users\Admin\AppData\Local\Temp\{E531367E-F326-4008-9A09-D415774218D7}
      Filesize

      128KB

      MD5

      cdfd86ce8bd3a626548be7e3a484f80d

      SHA1

      457e03ddc8da239764b5e08134be83712495b2ad

      SHA256

      266af1ceabf6a6ce982350b2fa7b394505764b3f7bd84087fc6701447c76aa5d

      SHA512

      b7c98bc2f8e8a77e64d54dfda97f800e84dca00cfcb7f313c80d67b50833d08c2f56f90fd0103d2ad2edc1e70fc6225718712dbfdc3a952ad95f2c9be9ca1d74

    • memory/1724-54-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB