Analysis

  • max time kernel
    120s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    17-01-2023 22:03

General

  • Target

    061fa5f50e88f06a4d845b1f86ef3c14.xls

  • Size

    207KB

  • MD5

    061fa5f50e88f06a4d845b1f86ef3c14

  • SHA1

    946eb8d618a20508e44af4f4c20ebadbacf97d3d

  • SHA256

    9bb9d51399f27272bb1febf6cd18f08d423b78fc874f5149e6d8a483f14eaae8

  • SHA512

    7a2926083bffbbea4d6b2f8e24d588849e3b48a980d4d622fbdb69887fde825df4db2d4a00ee40993b06e4318230c4d3c0429ca88e6f60445fa7a9ff5afb2042

  • SSDEEP

    1536:JZKvwTTTT3irSbAx2b64z2tUiWVbrEr4BjJQ7ITkR62l4ozWWt2XKsPFJM2M/MJG:JZKvRWVbrZNQ7ITk9Tyab5kJD6

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 3 IoCs

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

  • Deletes itself 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Views/modifies file attributes 1 TTPs 1 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\061fa5f50e88f06a4d845b1f86ef3c14.xls
    1⤵
    • Deletes itself
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • NTFS ADS
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: RenamesItself
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1312
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:888
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1964
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      PID:1716

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Hidden Files and Directories

1
T1158

Defense Evasion

Modify Registry

1
T1112

Hidden Files and Directories

1
T1158

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/888-65-0x0000000000000000-mapping.dmp
  • memory/1312-54-0x000000002F731000-0x000000002F734000-memory.dmp
    Filesize

    12KB

  • memory/1312-55-0x0000000071321000-0x0000000071323000-memory.dmp
    Filesize

    8KB

  • memory/1312-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1312-57-0x000000007230D000-0x0000000072318000-memory.dmp
    Filesize

    44KB

  • memory/1312-58-0x0000000075F51000-0x0000000075F53000-memory.dmp
    Filesize

    8KB

  • memory/1312-69-0x000000007230D000-0x0000000072318000-memory.dmp
    Filesize

    44KB

  • memory/1312-76-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1312-77-0x000000007230D000-0x0000000072318000-memory.dmp
    Filesize

    44KB

  • memory/1668-66-0x0000000000000000-mapping.dmp
  • memory/1716-67-0x0000000000000000-mapping.dmp
  • memory/1964-68-0x0000000000000000-mapping.dmp