Analysis

  • max time kernel
    100s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 07:10

General

  • Target

    New product inquiry.xls

  • Size

    813KB

  • MD5

    4859c29947306b3f0163bec37575537f

  • SHA1

    a1e676427e0f177c438facadeb2bfe85271afff0

  • SHA256

    269b7e66dfd8f5be336e54a51855bdf175315593ae0ee6447ad3d0e600d60e6a

  • SHA512

    7a04709ff6ecec502e4af7035dd38cd7c6fe799ecd9b17d777056526a3c22e353f1e7e965b30a0a817daeed4d96d022dd26df8d0c86a6136fdd86d9f69d43272

  • SSDEEP

    24576:DZlr5XXXXXXXXXXXXUXXXXXXXSXXXXXXXX5mxr5XXXXXXXXXXXXUXXXXXXXSXXXs:I41sbO

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 6 IoCs
  • 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 use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 8 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\New product inquiry.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1896
  • 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:1568
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Users\Admin\AppData\Local\Temp\bycak.exe
        "C:\Users\Admin\AppData\Local\Temp\bycak.exe" C:\Users\Admin\AppData\Local\Temp\wyztqnw.mt
        3⤵
        • Executes dropped EXE
        PID:1824

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\bycak.exe

    Filesize

    122KB

    MD5

    cb9c0dd53fc78217204b1b5a661a7a9e

    SHA1

    02a5746069098f8c42bf5dbfd5c21eefc0716876

    SHA256

    4bee2cba959b0072644471160710472b4f0e87759dca1c3e4601be5c22a6d8d5

    SHA512

    e90b36a5455d9874627da545e302cbfe84b7b43134fd2d51cb5d0e7de5c56ebe97e20f299cc28f4e002e1e4587ee2ece48652c2ef6ed4d9dbead5df5c1c5eac7

  • C:\Users\Public\vbc.exe

    Filesize

    170KB

    MD5

    6900fa6fa6e78b309e90fe062faea83c

    SHA1

    1a058259cf7491ee4c06884024198185a91e5098

    SHA256

    0e6b53a04df25f14e580b1ced1b1a8715d91e009e18d7768565cba8acaf4f29c

    SHA512

    8009229ef42b85fefb802275235674d7cf4bf398e158059dc4add8a608d0ea55ab6eeae36f8f0d1941e82c048cae1372f3c4e965d342a0f937f9398a7a617ab8

  • C:\Users\Public\vbc.exe

    Filesize

    170KB

    MD5

    6900fa6fa6e78b309e90fe062faea83c

    SHA1

    1a058259cf7491ee4c06884024198185a91e5098

    SHA256

    0e6b53a04df25f14e580b1ced1b1a8715d91e009e18d7768565cba8acaf4f29c

    SHA512

    8009229ef42b85fefb802275235674d7cf4bf398e158059dc4add8a608d0ea55ab6eeae36f8f0d1941e82c048cae1372f3c4e965d342a0f937f9398a7a617ab8

  • \Users\Admin\AppData\Local\Temp\bycak.exe

    Filesize

    122KB

    MD5

    cb9c0dd53fc78217204b1b5a661a7a9e

    SHA1

    02a5746069098f8c42bf5dbfd5c21eefc0716876

    SHA256

    4bee2cba959b0072644471160710472b4f0e87759dca1c3e4601be5c22a6d8d5

    SHA512

    e90b36a5455d9874627da545e302cbfe84b7b43134fd2d51cb5d0e7de5c56ebe97e20f299cc28f4e002e1e4587ee2ece48652c2ef6ed4d9dbead5df5c1c5eac7

  • \Users\Public\vbc.exe

    Filesize

    170KB

    MD5

    6900fa6fa6e78b309e90fe062faea83c

    SHA1

    1a058259cf7491ee4c06884024198185a91e5098

    SHA256

    0e6b53a04df25f14e580b1ced1b1a8715d91e009e18d7768565cba8acaf4f29c

    SHA512

    8009229ef42b85fefb802275235674d7cf4bf398e158059dc4add8a608d0ea55ab6eeae36f8f0d1941e82c048cae1372f3c4e965d342a0f937f9398a7a617ab8

  • memory/1688-62-0x0000000000000000-mapping.dmp

  • memory/1824-67-0x0000000000000000-mapping.dmp

  • memory/1896-60-0x00000000723ED000-0x00000000723F8000-memory.dmp

    Filesize

    44KB

  • memory/1896-54-0x000000002FF81000-0x000000002FF84000-memory.dmp

    Filesize

    12KB

  • memory/1896-58-0x0000000075201000-0x0000000075203000-memory.dmp

    Filesize

    8KB

  • memory/1896-57-0x00000000723ED000-0x00000000723F8000-memory.dmp

    Filesize

    44KB

  • memory/1896-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1896-55-0x0000000071401000-0x0000000071403000-memory.dmp

    Filesize

    8KB

  • memory/1896-69-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1896-70-0x00000000723ED000-0x00000000723F8000-memory.dmp

    Filesize

    44KB