Analysis

  • max time kernel
    105s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 08:44

General

  • Target

    cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1.xls

  • Size

    162KB

  • MD5

    2d5f2206be8584682eece9f0db900b12

  • SHA1

    159d5962ff92a38b71a060134c59329abdd348e1

  • SHA256

    cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1

  • SHA512

    21a1f3c2bd212e11327313389918227e92b7713c15d2a371b3523fd08398a7277a1819632fbe1d45714a97163d509bc4c4c3f9db2b2fe4c4845c444a3e6a4206

  • SSDEEP

    3072:ezq0rbx4/LiXkxGUBrpgD8IBPFm91aWVbrzb7ITk99joJtXw15k5/:EqV1ugIBe10

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 3 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\cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1.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:1600
    • 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:1828
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1064
    • 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:1740
    • 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:860

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/860-221-0x0000000000000000-mapping.dmp
  • memory/1064-222-0x0000000000000000-mapping.dmp
  • memory/1600-54-0x000000002F9C1000-0x000000002F9C4000-memory.dmp
    Filesize

    12KB

  • memory/1600-55-0x0000000071341000-0x0000000071343000-memory.dmp
    Filesize

    8KB

  • memory/1600-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1600-57-0x0000000076461000-0x0000000076463000-memory.dmp
    Filesize

    8KB

  • memory/1600-58-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1600-383-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1600-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1600-385-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1740-220-0x0000000000000000-mapping.dmp
  • memory/1828-219-0x0000000000000000-mapping.dmp