Analysis

  • max time kernel
    90s
  • max time network
    89s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    07-12-2020 17:58

General

  • Target

    certificate_12.20.doc

  • Size

    75KB

  • MD5

    09a3cabe56bddaccf3736c626524a267

  • SHA1

    ecd402f6d90ce58878aa67cc889e1a2ffecafe3e

  • SHA256

    3e670878dd1bec8ea456d334a47600c9e174a380afd89d86725fa8e81b9bc8f4

  • SHA512

    2d651168d56371706ea4709f0f313c9fe262a1f3930fe21e3f40e241113057a623a8839f448fbd358eeb1b446b35ab869d905efb8bef83289236533edae330ed

Score
10/10

Malware Config

Signatures

  • IcedID, BokBot

    IcedID is a banking trojan capable of stealing credentials.

  • 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 9 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 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 system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 22 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\certificate_12.20.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\System32\rundll32.exe" url.dll,OpenURL c:\users\public\index.hta
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:1244
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\users\public\index.hta"
        3⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1872
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\programdata\aK2TUb.pdf,ShowDialogA -r
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:1620
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1640

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    2
    T1112

    Install Root Certificate

    1
    T1130

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\users\public\index.hta
      MD5

      8983ba41e1c99c3e4c9aff611761c3f0

      SHA1

      f239ccc0def9802ec8a03f75d124ad1447b274ee

      SHA256

      206f477c988d35c480f1c733a04b39ad981262973810407e4fbb879dc4cb2d1f

      SHA512

      31529a53db27aea18155330f8a26ec5090f1ac8cc9996c9374d4c9c749a02fe70b9fb070b1649c58f1e127fe7d5d2884ffabccfcc97b2bd0616fac3f88b1e460

    • \??\c:\programdata\aK2TUb.pdf
      MD5

      0cac3df1337995a6720fc4d54b8fd2af

      SHA1

      772fc79ec590ffd440cc7e4f4bcd311a4af094d0

      SHA256

      f79487c85c39f55bc0d7d94bf2834731af8b2ef16dfb48ab99b8b6280368dec4

      SHA512

      a1612e898778410bef6ddd0fd00cd2e5190ea4d167ae2c187734782f60ee33a33a984477fdf39379d2b66a9788f49dbd777468fbc43de50350bc7eb0fab8a7bd

    • \ProgramData\aK2TUb.pdf
      MD5

      0cac3df1337995a6720fc4d54b8fd2af

      SHA1

      772fc79ec590ffd440cc7e4f4bcd311a4af094d0

      SHA256

      f79487c85c39f55bc0d7d94bf2834731af8b2ef16dfb48ab99b8b6280368dec4

      SHA512

      a1612e898778410bef6ddd0fd00cd2e5190ea4d167ae2c187734782f60ee33a33a984477fdf39379d2b66a9788f49dbd777468fbc43de50350bc7eb0fab8a7bd

    • memory/344-8-0x000007FEF7730000-0x000007FEF79AA000-memory.dmp
      Filesize

      2.5MB

    • memory/1244-4-0x0000000000000000-mapping.dmp
    • memory/1620-9-0x0000000000000000-mapping.dmp
    • memory/1640-7-0x0000000000000000-mapping.dmp
    • memory/1744-3-0x00000000003F4000-0x00000000003F8000-memory.dmp
      Filesize

      16KB

    • memory/1744-2-0x0000000004D70000-0x0000000004DD5000-memory.dmp
      Filesize

      404KB

    • memory/1872-6-0x0000000000000000-mapping.dmp
    • memory/1872-12-0x0000000006110000-0x0000000006133000-memory.dmp
      Filesize

      140KB