Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    18-12-2020 15:14

General

  • Target

    dictate.12.20.doc

  • Size

    80KB

  • MD5

    62c50cfe2bf091d4467d173269013bc1

  • SHA1

    3aa44d53b3f6a7e819aef69f11f5f3bd7c9c76e1

  • SHA256

    30739a63f06056178c395aea513686a49652ed9cb7f81c4baabee6cd8f950c9f

  • SHA512

    c86444b42e7633ac05f349fa363de6e0537579cf86aff4158737a32f7298f6b7ee7eeaabc1d628f576facef0c2541a1150c6adce3d4e773b31a132006933c20e

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 System32 directory 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 15 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\dictate.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:2024
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:336
    • C:\Windows\system32\rundll32.exe
      rundll32.exe url.dll,OpenURL c:\users\public\index.hta
      1⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:1784
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\SysWOW64\mshta.exe" "C:\users\public\index.hta"
        2⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1932
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\programdata\a8crv.pdf,ShowDialogA -r
          3⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Drops file in System32 directory
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:2016

    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

      afc2e8e99d54697628a411c8445d6dca

      SHA1

      6fad0bbe6e1ffb2ab894c47d3fb7a8bdeb0a8ef6

      SHA256

      7e4ac89ede57f68f64f2e4fda568998ad3236862a30ba2c4b5403391bbb4cb75

      SHA512

      224da383fe131674196f7d6ecb1564e1709821721354a14e5893714f2ce438e85649337e643c00c3aeb68c6d61c16f474435e064cf68cedb314802118ef8bf39

    • \??\c:\programdata\a8crv.pdf
      MD5

      927b860c90d844177ea9c9bdf4c9831a

      SHA1

      5ced404d98144a73b8af4dcb390f0c660f3183db

      SHA256

      1bf0bc59fb4d4618097b31bc86fdbf44e01240e7bbbbd1ad1be7ece79f5d3b3d

      SHA512

      eb352776c894a5595d6e7e90047552a2b44a6dfc297d5044dd2033bedd120bd17da59c4b08ea6cc6fd9ceceaa8867a06e564a7f1ea12360a8f80b2191e02b451

    • \ProgramData\a8crv.pdf
      MD5

      927b860c90d844177ea9c9bdf4c9831a

      SHA1

      5ced404d98144a73b8af4dcb390f0c660f3183db

      SHA256

      1bf0bc59fb4d4618097b31bc86fdbf44e01240e7bbbbd1ad1be7ece79f5d3b3d

      SHA512

      eb352776c894a5595d6e7e90047552a2b44a6dfc297d5044dd2033bedd120bd17da59c4b08ea6cc6fd9ceceaa8867a06e564a7f1ea12360a8f80b2191e02b451

    • memory/336-4-0x0000000000000000-mapping.dmp
    • memory/1156-5-0x000007FEF77C0000-0x000007FEF7A3A000-memory.dmp
      Filesize

      2.5MB

    • memory/1932-3-0x0000000000000000-mapping.dmp
    • memory/2016-6-0x0000000000000000-mapping.dmp
    • memory/2024-9-0x0000000000560000-0x0000000000561000-memory.dmp
      Filesize

      4KB