Analysis

  • max time kernel
    175s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 19:07

General

  • Target

    3b65f45b8ef1ae7e290bd79f6b4be830b8dcd3dd53ce4b2f3086c356170710a6.xls

  • Size

    88KB

  • MD5

    a3ca7b671b6451cdcafd8f47a4e88e75

  • SHA1

    a508ac5d96b1526c37a808f886c06dfe068fe5e9

  • SHA256

    3b65f45b8ef1ae7e290bd79f6b4be830b8dcd3dd53ce4b2f3086c356170710a6

  • SHA512

    85c144a33fdefe5e3b38d4a6b163a844b44605ee3ad60d664d31dcafbe622e35f55095e8b4929cce6e50ff5a7f18ff8064b1dccddd12c493cead5fa51c1f1fe9

  • SSDEEP

    1536:i222y9MfecOg2jcc0lbxOvTgZsLcY7nJdFoOGIayWU2XKgb/:qg2jcc0lbxOr/p8baq/

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\3b65f45b8ef1ae7e290bd79f6b4be830b8dcd3dd53ce4b2f3086c356170710a6.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:1504
    • 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:1640
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1176
    • 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:300
    • 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:1540

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/300-221-0x0000000000000000-mapping.dmp
  • memory/1176-223-0x0000000000000000-mapping.dmp
  • memory/1504-54-0x000000002F691000-0x000000002F694000-memory.dmp
    Filesize

    12KB

  • memory/1504-55-0x0000000071C41000-0x0000000071C43000-memory.dmp
    Filesize

    8KB

  • memory/1504-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1504-57-0x0000000072C2D000-0x0000000072C38000-memory.dmp
    Filesize

    44KB

  • memory/1504-58-0x00000000767B1000-0x00000000767B3000-memory.dmp
    Filesize

    8KB

  • memory/1504-59-0x0000000072C2D000-0x0000000072C38000-memory.dmp
    Filesize

    44KB

  • memory/1504-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1504-385-0x0000000072C2D000-0x0000000072C38000-memory.dmp
    Filesize

    44KB

  • memory/1540-222-0x0000000000000000-mapping.dmp
  • memory/1640-220-0x0000000000000000-mapping.dmp