Analysis

  • max time kernel
    80s
  • max time network
    80s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    18-12-2020 15:00

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:1916
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:376
    • 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:1648
      • 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:548
        • 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:1608

    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

      fd8faf7439a2a23978a4a20bc10497f5

      SHA1

      94207cfa425ef03b80395646ba214bab8a25f020

      SHA256

      a565fc9117f92e5a5a7d3d75a0144567d691b75a70b5a5b6bb94fbac05b0105c

      SHA512

      10a3818fce7a2a46261ea6566367e6a83ce1eb2856a7f11897c57278738f67aa09fefd77bc83fb3bd0bf28946de85fb349f4e336b3648986ac56555402f6c117

    • \ProgramData\a8crv.pdf
      MD5

      fd8faf7439a2a23978a4a20bc10497f5

      SHA1

      94207cfa425ef03b80395646ba214bab8a25f020

      SHA256

      a565fc9117f92e5a5a7d3d75a0144567d691b75a70b5a5b6bb94fbac05b0105c

      SHA512

      10a3818fce7a2a46261ea6566367e6a83ce1eb2856a7f11897c57278738f67aa09fefd77bc83fb3bd0bf28946de85fb349f4e336b3648986ac56555402f6c117

    • memory/376-4-0x0000000000000000-mapping.dmp
    • memory/548-3-0x0000000000000000-mapping.dmp
    • memory/1608-6-0x0000000000000000-mapping.dmp
    • memory/1796-5-0x000007FEF6270000-0x000007FEF64EA000-memory.dmp
      Filesize

      2.5MB