Analysis

  • max time kernel
    106s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    31-01-2023 17:36

General

  • Target

    c59cfc540618526b2233ea40f02ba57f.xls

  • Size

    389KB

  • MD5

    c59cfc540618526b2233ea40f02ba57f

  • SHA1

    399a21faf44443397d514abb7f44e2c44286e2a2

  • SHA256

    10714e5e2e38c5d10939b029a59f8960e41d4ed9acffdffdcb1759894ca3ca19

  • SHA512

    503301b3dd0a8aa56a22755a2e626e6ccb2ba780e7c3891f91fff1bf8cfac18461ab1e29175dd9fb924aa444a1725d3f30843479156e5529edaea433eaf1cb39

  • SSDEEP

    6144:7XGSLCvXuzqAsQ4/OEl7B5hiEPpXlou8xi/1TBFWVh3c:RvmEns

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\c59cfc540618526b2233ea40f02ba57f.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:1352
    • 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:864
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1664
    • 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:1208
    • 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:668

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/668-221-0x0000000000000000-mapping.dmp
  • memory/864-219-0x0000000000000000-mapping.dmp
  • memory/1208-220-0x0000000000000000-mapping.dmp
  • memory/1352-385-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-280-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-57-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1352-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1352-55-0x0000000070E01000-0x0000000070E03000-memory.dmp
    Filesize

    8KB

  • memory/1352-391-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1352-278-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-58-0x0000000075B51000-0x0000000075B53000-memory.dmp
    Filesize

    8KB

  • memory/1352-386-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-54-0x000000002FC11000-0x000000002FC14000-memory.dmp
    Filesize

    12KB

  • memory/1352-387-0x0000000071DED000-0x0000000071DF8000-memory.dmp
    Filesize

    44KB

  • memory/1352-388-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-389-0x0000000005410000-0x0000000005510000-memory.dmp
    Filesize

    1024KB

  • memory/1352-390-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1664-222-0x0000000000000000-mapping.dmp