Analysis

  • max time kernel
    106s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    10-05-2021 07:36

General

  • Target

    instruct 05.21.doc

  • Size

    79KB

  • MD5

    bf286f85a3b7893bead31dbe09feec4d

  • SHA1

    2c174a0a7dd939c186d99e6930176937e5c004e0

  • SHA256

    791a45eee838e037f6101691af2417eee3b5cccb96e9e9ab25ffce679471a6d9

  • SHA512

    fe88b0942223abd00218ec8712c12f399b6139d66ec74fc42acef0a085307057a2030c2c97eb68b935ac72d3ee9e62f6e645ab34fc950dc9617a2eb8f270e966

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\instruct 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:1084
    • C:\Windows\SysWOW64\explorer.exe
      explorer c:\users\public\captionProcedureQuery.hta
      2⤵
      • Process spawned unexpected child process
      PID:1764
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1668
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1240
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Public\captionProcedureQuery.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1580
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\users\public\captionProcedureQuery.jpg,PluginInit
          3⤵
            PID:1744

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        71ed29a70f05e45519b3a2bbf68e3f9d

        SHA1

        3d29872afa6ee8282cf3843b96b1c29b4d7ed8c2

        SHA256

        82527e0e6eee06cd0ed2a34f63cb13ee2a6c3dd294cee2dcffdb527c23fa7164

        SHA512

        7e0e458275401fbb63f9bcbd114941ed191f2887559eedfdc99beb22f4244df9c14221b68d830168af4da20dd54432764dbec1e374cb7392f07712f4d6ed7953

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

        7548e9382e6076dfe1dfdfdb5c1b9838

        SHA1

        5f3f4f581a43f251fcd213b69129fcb34f8c9380

        SHA256

        bea6a9854a027cba7464e72333f608eb5cb847539bfee175a0e48dfea9acce2c

        SHA512

        cd8a87c9b6e1c1b0ee29bc49d2ad27eec5d2b251a0e090d99f675495ac1298355d1471c7d916e95185a69cbacddd589e483877bf104baeb1a0b74191c229b8b1

      • memory/1084-60-0x00000000700E1000-0x00000000700E3000-memory.dmp
        Filesize

        8KB

      • memory/1084-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1084-59-0x0000000072661000-0x0000000072664000-memory.dmp
        Filesize

        12KB

      • memory/1084-62-0x0000000005D20000-0x000000000696A000-memory.dmp
        Filesize

        12.3MB

      • memory/1084-74-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1240-66-0x000007FEFBAB1000-0x000007FEFBAB3000-memory.dmp
        Filesize

        8KB

      • memory/1580-68-0x0000000000000000-mapping.dmp
      • memory/1668-69-0x0000000000000000-mapping.dmp
      • memory/1744-71-0x0000000000000000-mapping.dmp
      • memory/1764-63-0x0000000000000000-mapping.dmp
      • memory/1764-65-0x000000006B0C1000-0x000000006B0C3000-memory.dmp
        Filesize

        8KB

      • memory/1764-64-0x0000000075411000-0x0000000075413000-memory.dmp
        Filesize

        8KB