Analysis

  • max time kernel
    101s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 14:41

General

  • Target

    b507f597117a4acd8ce703f3540738da8c0765ecbfaf2d77c01e0aca6f4700ac.xls

  • Size

    94KB

  • MD5

    039ee77ecaf5281cfbf755de8b984f5d

  • SHA1

    d688728a7e25d04d47e19516f76dbd292b9b3c86

  • SHA256

    b507f597117a4acd8ce703f3540738da8c0765ecbfaf2d77c01e0aca6f4700ac

  • SHA512

    9973a203eddb1c754d543fb50265c5b9b6539d34be1f5d29791d04ee2797f44b9fc59b54d1e1459013b9b9e4773faebfa84f672359331114a3118b5036fce6f3

  • SSDEEP

    1536:5W2eadfHfWVKXDL4zQ7ITkR62l5IhY7nJdJoOd7cJyXwR+M2M/MRqkY:XWVZzQ7ITk9Q2AJyXwz5kJY

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\b507f597117a4acd8ce703f3540738da8c0765ecbfaf2d77c01e0aca6f4700ac.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:868
    • 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:1724
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:840
    • 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:340
    • 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:1056

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/340-221-0x0000000000000000-mapping.dmp
  • memory/840-223-0x0000000000000000-mapping.dmp
  • memory/868-54-0x000000002F2D1000-0x000000002F2D4000-memory.dmp
    Filesize

    12KB

  • memory/868-55-0x0000000070EA1000-0x0000000070EA3000-memory.dmp
    Filesize

    8KB

  • memory/868-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/868-57-0x0000000071E8D000-0x0000000071E98000-memory.dmp
    Filesize

    44KB

  • memory/868-58-0x0000000071E8D000-0x0000000071E98000-memory.dmp
    Filesize

    44KB

  • memory/868-59-0x0000000075131000-0x0000000075133000-memory.dmp
    Filesize

    8KB

  • memory/868-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/868-385-0x0000000071E8D000-0x0000000071E98000-memory.dmp
    Filesize

    44KB

  • memory/1056-222-0x0000000000000000-mapping.dmp
  • memory/1724-220-0x0000000000000000-mapping.dmp