Analysis

  • max time kernel
    150s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    13-12-2022 22:48

General

  • Target

    922520AFAD47B7BCC199D8D2DD44F79CBADC913C5E2FD8D0287CE892D731F8C0.xls

  • Size

    91KB

  • MD5

    472201a6154fd3e1271543e6f1b3b509

  • SHA1

    fc4a953cf231ca7bd5bde2a260fd74441ceadd3e

  • SHA256

    922520afad47b7bcc199d8d2dd44f79cbadc913c5e2fd8d0287ce892d731f8c0

  • SHA512

    a8cda477a2ca2f89afd5250bbad952bd5c5086fe5b28d8f243750f08adb45c06295dbe7ab9d58df5995efebf4c7cc0ccdea61fa203c1cc21c786bede715ae8e0

  • SSDEEP

    1536:LKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgEbCXuZH4gb4CEn9J4ZcEM:LKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg1

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://www.muyehuayi.com/cmp/8asA99KPsyA/v6lUsWbLen/

xlm40.dropper

http://concivilpa.com.py/wp-admin/i3CQu9dzDrMW/

xlm40.dropper

https://wijsneusmedia.nl/cgi-bin/kFB/

xlm40.dropper

http://www.angloextrema.com.br/assets/oEt1yYckHKlnNIq/

Signatures

  • Process spawned unexpected child process 4 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 28 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\922520AFAD47B7BCC199D8D2DD44F79CBADC913C5E2FD8D0287CE892D731F8C0.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:952
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv1.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:784
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv2.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:316
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv3.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:276
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\elv4.ooocccxxx
      2⤵
      • Process spawned unexpected child process
      PID:1544

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/276-64-0x0000000000000000-mapping.dmp
  • memory/316-62-0x0000000000000000-mapping.dmp
  • memory/784-60-0x0000000000000000-mapping.dmp
  • memory/952-54-0x000000002F0C1000-0x000000002F0C4000-memory.dmp
    Filesize

    12KB

  • memory/952-55-0x0000000071271000-0x0000000071273000-memory.dmp
    Filesize

    8KB

  • memory/952-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/952-57-0x000000007225D000-0x0000000072268000-memory.dmp
    Filesize

    44KB

  • memory/952-58-0x0000000075521000-0x0000000075523000-memory.dmp
    Filesize

    8KB

  • memory/952-59-0x000000007225D000-0x0000000072268000-memory.dmp
    Filesize

    44KB

  • memory/1544-66-0x0000000000000000-mapping.dmp