Analysis

  • max time kernel
    114s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 13:38

General

  • Target

    PO 22-425.rtf

  • Size

    23KB

  • MD5

    fc3c8f87f712820eb67c9fedcf3753d5

  • SHA1

    35d27b6e305aaa9fb3b35d325608c21f4c55d380

  • SHA256

    7e02cb1039c0c89b5eb20a3f6a1314251ac7a0d9d5304bcc65d779a082e7d32f

  • SHA512

    d1ee732570caf8fec7f2cabd9beea2c084e954b178d85a3a17d8ee7e8014ff854dc599ec58b60b653f93bcfda259c1a655046c3c7a4cf4b78be12bc892514cb7

  • SSDEEP

    384:kQMmdOFNYY0aaaIswqPeOrka1+fHQJ+t3rQkRhZuq93Fs/wvTRG6bJTVdMS/g:wFx0XaIsnPRIa4fwJMS/wvTRG6bJrMx

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • 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 8 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\PO 22-425.rtf"
    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:1384
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1520
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1604
      • C:\Users\Admin\AppData\Roaming\nnaarci4782.exe
        "C:\Users\Admin\AppData\Roaming\nnaarci4782.exe"
        2⤵
        • Executes dropped EXE
        PID:1524

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Exploitation for Client Execution

    1
    T1203

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\nnaarci4782.exe
      Filesize

      1.1MB

      MD5

      31c04c59e7015caf78cdf5385fc39bcd

      SHA1

      7a3d90ac62d2344283da7d6a32c98732c6418629

      SHA256

      504556bc934dda104702afe7d71be8452e82a7b5273183f0bac61f384d33ccb1

      SHA512

      1f12c309cfa76b263684bab5280ec2ee30bdcc776e1eb4e4be54fcad30a41b86cf829221bcfe302359146e0a9aedbb3a838c4e99f1b49726b42438404b2b9986

    • C:\Users\Admin\AppData\Roaming\nnaarci4782.exe
      Filesize

      1.1MB

      MD5

      31c04c59e7015caf78cdf5385fc39bcd

      SHA1

      7a3d90ac62d2344283da7d6a32c98732c6418629

      SHA256

      504556bc934dda104702afe7d71be8452e82a7b5273183f0bac61f384d33ccb1

      SHA512

      1f12c309cfa76b263684bab5280ec2ee30bdcc776e1eb4e4be54fcad30a41b86cf829221bcfe302359146e0a9aedbb3a838c4e99f1b49726b42438404b2b9986

    • \Users\Admin\AppData\Roaming\nnaarci4782.exe
      Filesize

      1.1MB

      MD5

      31c04c59e7015caf78cdf5385fc39bcd

      SHA1

      7a3d90ac62d2344283da7d6a32c98732c6418629

      SHA256

      504556bc934dda104702afe7d71be8452e82a7b5273183f0bac61f384d33ccb1

      SHA512

      1f12c309cfa76b263684bab5280ec2ee30bdcc776e1eb4e4be54fcad30a41b86cf829221bcfe302359146e0a9aedbb3a838c4e99f1b49726b42438404b2b9986

    • \Users\Admin\AppData\Roaming\nnaarci4782.exe
      Filesize

      1.1MB

      MD5

      31c04c59e7015caf78cdf5385fc39bcd

      SHA1

      7a3d90ac62d2344283da7d6a32c98732c6418629

      SHA256

      504556bc934dda104702afe7d71be8452e82a7b5273183f0bac61f384d33ccb1

      SHA512

      1f12c309cfa76b263684bab5280ec2ee30bdcc776e1eb4e4be54fcad30a41b86cf829221bcfe302359146e0a9aedbb3a838c4e99f1b49726b42438404b2b9986

    • memory/1384-58-0x0000000076701000-0x0000000076703000-memory.dmp
      Filesize

      8KB

    • memory/1384-59-0x00000000718ED000-0x00000000718F8000-memory.dmp
      Filesize

      44KB

    • memory/1384-54-0x0000000072E81000-0x0000000072E84000-memory.dmp
      Filesize

      12KB

    • memory/1384-57-0x00000000718ED000-0x00000000718F8000-memory.dmp
      Filesize

      44KB

    • memory/1384-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1384-55-0x0000000070901000-0x0000000070903000-memory.dmp
      Filesize

      8KB

    • memory/1384-70-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1384-71-0x00000000718ED000-0x00000000718F8000-memory.dmp
      Filesize

      44KB

    • memory/1520-68-0x0000000000000000-mapping.dmp
    • memory/1520-69-0x000007FEFC391000-0x000007FEFC393000-memory.dmp
      Filesize

      8KB

    • memory/1524-63-0x0000000000000000-mapping.dmp
    • memory/1524-66-0x0000000000B30000-0x0000000000C5C000-memory.dmp
      Filesize

      1.2MB

    • memory/1524-72-0x0000000000480000-0x0000000000498000-memory.dmp
      Filesize

      96KB