Resubmissions

16-03-2022 08:41

220316-klxj3abce2 10

16-03-2022 08:37

220316-kjjv7abca8 8

Analysis

  • max time kernel
    4294214s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20220310-en
  • submitted
    16-03-2022 08:37

General

  • Target

    PO 121873.xlsx

  • Size

    713KB

  • MD5

    9f2cf851a66d5ec3520dab2364619890

  • SHA1

    cf6184531e30b05d1e5565d4626441c757240aa5

  • SHA256

    2f5b78358322f5fd8c560d8a223282016decea4d3f74f5145283d3f1ec764ebc

  • SHA512

    1da16064e04dcddd44e49cb4973a407c9502dbbe23d3247322c3114329994799219c7244bd4876bf9f89b1fe3cc7d6366704cb944e30bf56b5b6e6d7bf19230b

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • 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 19 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\PO 121873.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1824
  • 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:432
    • C:\Users\Admin\AppData\Roaming\binex.exe
      C:\Users\Admin\AppData\Roaming\binex.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Users\Admin\AppData\Local\Temp\ywpbz.exe
        C:\Users\Admin\AppData\Local\Temp\ywpbz.exe C:\Users\Admin\AppData\Local\Temp\opdnes
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1880
        • C:\Users\Admin\AppData\Local\Temp\ywpbz.exe
          C:\Users\Admin\AppData\Local\Temp\ywpbz.exe C:\Users\Admin\AppData\Local\Temp\opdnes
          4⤵
          • Executes dropped EXE
          PID:1908

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/432-58-0x00000000760A1000-0x00000000760A3000-memory.dmp

    Filesize

    8KB

  • memory/1824-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1824-57-0x000000007242D000-0x0000000072438000-memory.dmp

    Filesize

    44KB

  • memory/1824-54-0x000000002F671000-0x000000002F674000-memory.dmp

    Filesize

    12KB

  • memory/1824-55-0x0000000071441000-0x0000000071443000-memory.dmp

    Filesize

    8KB

  • memory/1908-71-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/1908-75-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/1908-76-0x000000006C110000-0x000000006C7FE000-memory.dmp

    Filesize

    6.9MB

  • memory/1908-77-0x00000000021A1000-0x00000000021A2000-memory.dmp

    Filesize

    4KB

  • memory/1908-78-0x0000000000450000-0x000000000048A000-memory.dmp

    Filesize

    232KB

  • memory/1908-79-0x00000000021A2000-0x00000000021A3000-memory.dmp

    Filesize

    4KB

  • memory/1908-80-0x00000000021A3000-0x00000000021A4000-memory.dmp

    Filesize

    4KB

  • memory/1908-81-0x00000000021A4000-0x00000000021A5000-memory.dmp

    Filesize

    4KB