Analysis

  • max time kernel
    90s
  • max time network
    92s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    10-12-2020 01:50

General

  • Target

    charge-12.20.doc

  • Size

    90KB

  • MD5

    76197f6d42cd64acde1972d4a52ae82d

  • SHA1

    71654b1ae3657a9f18b97fd7a26cfda4e67b0988

  • SHA256

    55d904b83f04acb4118df9b2bd3ebbd44b9553b0aabcfff7b68d674ddb6052cc

  • SHA512

    c7f2c95d6f02885403c88f549f14ee8fd8efde905f8b42362857b0c8c9f83e7b4bbe09f7933184f931049aba25d1112bac6fd488f95eebc94b75badc09cf3b8c

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\charge-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:1852
    • 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:1288
      • 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:1856
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\System32\rundll32.exe" c:\programdata\a1ZcUb.pdf,ShowDialogA -r
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:1088
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1832

    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

      638f28c4846813aa8a3f3ba8166190d8

      SHA1

      59267056de664af22622b0eda64337a18f8d6271

      SHA256

      6dde31588640f1ed817f3fbc3322c18b7d66719d1fcbc5e11a332da006512b66

      SHA512

      a5f357c962ad9f03bd42c7b12fee71c8b51422fdc930cafffabc4fd18e4ec8021021499a1792f655530ddc437a49af5e4721c055c87f221504732a2ff7b7ad95

    • \??\c:\programdata\a1ZcUb.pdf
      MD5

      a1856975dc9d24664781f46c24e92e44

      SHA1

      8048f5f1367280bda428ef410f467a69343a486f

      SHA256

      79f7e431b8d3aefdde3155ca9a5c0e91178b5944f61ab78ddb4dedaf85cd8c1a

      SHA512

      45961465ebd175b25dcbbe6a4a82344ffe4221ab81bf0858769a10b809d791e5ea6bd50e4d5f31e991547dba24c798c7674387a4cf9c50478205740a28f9b513

    • \ProgramData\a1ZcUb.pdf
      MD5

      a1856975dc9d24664781f46c24e92e44

      SHA1

      8048f5f1367280bda428ef410f467a69343a486f

      SHA256

      79f7e431b8d3aefdde3155ca9a5c0e91178b5944f61ab78ddb4dedaf85cd8c1a

      SHA512

      45961465ebd175b25dcbbe6a4a82344ffe4221ab81bf0858769a10b809d791e5ea6bd50e4d5f31e991547dba24c798c7674387a4cf9c50478205740a28f9b513

    • memory/1088-9-0x0000000000000000-mapping.dmp
    • memory/1288-4-0x0000000000000000-mapping.dmp
    • memory/1532-8-0x000007FEF77D0000-0x000007FEF7A4A000-memory.dmp
      Filesize

      2.5MB

    • memory/1832-7-0x0000000000000000-mapping.dmp
    • memory/1852-2-0x00000000003E0000-0x00000000003E9000-memory.dmp
      Filesize

      36KB

    • memory/1852-3-0x0000000004BC0000-0x0000000004C25000-memory.dmp
      Filesize

      404KB

    • memory/1856-6-0x0000000000000000-mapping.dmp
    • memory/1856-12-0x0000000006450000-0x0000000006473000-memory.dmp
      Filesize

      140KB