Analysis

  • max time kernel
    96s
  • max time network
    99s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    10-12-2020 01:51

General

  • Target

    official paper.12.20.doc

  • Size

    77KB

  • MD5

    1b1b78aed0518d2608786b0c0a5af9ef

  • SHA1

    472a23c627100d627c8f98bde78a5bd28bcb2545

  • SHA256

    34ff76103583c35bebe706f721e1e692a7c34b226eb32fa96de9dcd4c8db7ddc

  • SHA512

    17b041223b618ba08f4f504bd43bff2bc4c6044eea86f5c17c5c1448e643ccccd56e2da8780ea91b21205dcd22aa4749a31216676b6943cf6903c3cb4dec4002

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 7 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\official paper.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:1204
    • 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:2040
      • 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:1688
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\programdata\arm2sL.pdf,ShowDialogA -r
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:556
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1272

    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

      cdb6cd41f190c13a1be598a9bf6c596f

      SHA1

      0ff0df401737d017d6c3c191e7e563626b3cedb4

      SHA256

      1b0f0e64d14ab36096bce932480f7e3e4357479641a75cf7c35bbbaa6590c4b4

      SHA512

      dd0ce2e64e8f5158dd3bcb04f0e935a4f7ec65541b1c79744a7354c247fa0c446c05988bc399933bcff72d658971238705c2e4001a964a663f2c1c88f4715b6d

    • \??\c:\programdata\arm2sL.pdf
      MD5

      f95dc82fd1ca58390a6139a3d24bc165

      SHA1

      d1cc0401e6f5be4de588f3ad8eff28b9d41d70c0

      SHA256

      4e8c0e221758786fff06cc9b560be681ba10facb05e47c1eb4492b19a0cc441a

      SHA512

      d8a1172f432652afa863cf8013a012c88598e3ca9d0971f8a6549c79f0449fc04db1d7a436ed95b6e8bd4ad5fc9e1d5c26dd417903ea5621c6b5a08a628b698f

    • \ProgramData\arm2sL.pdf
      MD5

      f95dc82fd1ca58390a6139a3d24bc165

      SHA1

      d1cc0401e6f5be4de588f3ad8eff28b9d41d70c0

      SHA256

      4e8c0e221758786fff06cc9b560be681ba10facb05e47c1eb4492b19a0cc441a

      SHA512

      d8a1172f432652afa863cf8013a012c88598e3ca9d0971f8a6549c79f0449fc04db1d7a436ed95b6e8bd4ad5fc9e1d5c26dd417903ea5621c6b5a08a628b698f

    • memory/556-8-0x0000000000000000-mapping.dmp
    • memory/1204-2-0x0000000004D70000-0x0000000004D73000-memory.dmp
      Filesize

      12KB

    • memory/1204-12-0x00000000004F0000-0x00000000004F1000-memory.dmp
      Filesize

      4KB

    • memory/1272-6-0x0000000000000000-mapping.dmp
    • memory/1504-7-0x000007FEF7140000-0x000007FEF73BA000-memory.dmp
      Filesize

      2.5MB

    • memory/1688-5-0x0000000000000000-mapping.dmp
    • memory/1688-11-0x0000000006180000-0x00000000061A3000-memory.dmp
      Filesize

      140KB

    • memory/2040-3-0x0000000000000000-mapping.dmp