Analysis

  • max time kernel
    146s
  • max time network
    85s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 13:39

General

  • Target

    BOM_431580_23.11.22 - Placements.xls

  • Size

    1.0MB

  • MD5

    9a53b56adecec33768f427031a3e068d

  • SHA1

    4ef5fdf9584ba21a16ddb2dd01aef99b81bf4307

  • SHA256

    80bfd5671a9013cc4ba919582612f6d16076e0663990572188093e61ae40e2bd

  • SHA512

    2bbea9904fc8757a00f4bf63d39a3f975972b8fce5633fb7560ca48faaaf81cdadca9f01adf25c7548c0c6cc9b50b1feff14d382e431225c5068934e47cd2bd4

  • SSDEEP

    24576:+r5XXXXXXXXXXXXUXXXXXXXSXXXXXXXXwmRr5XXXXXXXXXXXXUXXXXXXXSXXXXXz:Ef

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\BOM_431580_23.11.22 - Placements.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1952
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:588
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1796
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwA1AA==
        3⤵
        • Drops file in System32 directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:700

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    2.3MB

    MD5

    a4c10dbff44025acfeda8944ab6dd584

    SHA1

    1c42898381eda29d7341be92e53330cc411f7b18

    SHA256

    3da389626dd140e2ebe352ffa0a1c740285469092203d71d975fc2ed4d941bd7

    SHA512

    f4ee8bbe4ef5e75b66df7bfc74ae79a42cb080ad230a38e7a5c0c1a009e65d9348e077b54a96ca1efde03efd1e5335cb95e16e344885887f9783061b680002e3

  • C:\Users\Public\vbc.exe

    Filesize

    2.3MB

    MD5

    a4c10dbff44025acfeda8944ab6dd584

    SHA1

    1c42898381eda29d7341be92e53330cc411f7b18

    SHA256

    3da389626dd140e2ebe352ffa0a1c740285469092203d71d975fc2ed4d941bd7

    SHA512

    f4ee8bbe4ef5e75b66df7bfc74ae79a42cb080ad230a38e7a5c0c1a009e65d9348e077b54a96ca1efde03efd1e5335cb95e16e344885887f9783061b680002e3

  • \Users\Public\vbc.exe

    Filesize

    2.3MB

    MD5

    a4c10dbff44025acfeda8944ab6dd584

    SHA1

    1c42898381eda29d7341be92e53330cc411f7b18

    SHA256

    3da389626dd140e2ebe352ffa0a1c740285469092203d71d975fc2ed4d941bd7

    SHA512

    f4ee8bbe4ef5e75b66df7bfc74ae79a42cb080ad230a38e7a5c0c1a009e65d9348e077b54a96ca1efde03efd1e5335cb95e16e344885887f9783061b680002e3

  • memory/700-72-0x0000000073820000-0x0000000073DCB000-memory.dmp

    Filesize

    5.7MB

  • memory/700-71-0x0000000073820000-0x0000000073DCB000-memory.dmp

    Filesize

    5.7MB

  • memory/700-69-0x0000000000000000-mapping.dmp

  • memory/1796-66-0x0000000004B80000-0x0000000004DC4000-memory.dmp

    Filesize

    2.3MB

  • memory/1796-65-0x0000000000290000-0x00000000004D6000-memory.dmp

    Filesize

    2.3MB

  • memory/1796-62-0x0000000000000000-mapping.dmp

  • memory/1952-58-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

    Filesize

    8KB

  • memory/1952-60-0x0000000072C6D000-0x0000000072C78000-memory.dmp

    Filesize

    44KB

  • memory/1952-54-0x000000002FC01000-0x000000002FC04000-memory.dmp

    Filesize

    12KB

  • memory/1952-67-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1952-68-0x0000000072C6D000-0x0000000072C78000-memory.dmp

    Filesize

    44KB

  • memory/1952-57-0x0000000072C6D000-0x0000000072C78000-memory.dmp

    Filesize

    44KB

  • memory/1952-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1952-55-0x0000000071C81000-0x0000000071C83000-memory.dmp

    Filesize

    8KB