Analysis

  • max time kernel
    137s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/07/2024, 12:30

General

  • Target
    China's_gray_zone_warfare_against_Taiwan.doc.lnk
  • Size 1.4MB
  • Sample240719-ppn5ba1dpn
  • SHA256 2fa270cf83b341bc469b0d4430d2b5c3e95109b4b47f4f99c9e878aeaff8ec33
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • cobaltstrike

Botnet
  • 100000000

C2
  • http://upserver.updateservice.store:443/common.html

Attributes
  • access_type

    512

  • beacon_type

    2048

  • host

    upserver.updateservice.store,/common.html

  • http_header1

    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

  • http_header2

    AAAAEAAAACJIb3N0OiB1cHNlcnZlci51cGRhdGVzZXJ2aWNlLnN0b3JlAAAACgAAABFDb25uZWN0aW9uOiBjbG9zZQAAAAoAAAAvQ29udGVudC1UeXBlOiBhcHBsaWNhdGlvbi94LXd3dy1mb3JtLXVybGVuY29kZWQAAAAHAAAAAQAAAAMAAAADAAAAAgAAAAhhdXRob3JzPQAAAAQAAAAHAAAAAAAAAAMAAAACAAAADl9fc2Vzc2lvbl9faWQ9AAAABgAAAAZDb29raWUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=

  • http_method1

    GET

  • http_method2

    POST

  • jitter

    9472

  • polling_time

    58666

  • port_number

    443

  • sc_process32

    %windir%\syswow64\svchost.exe

  • sc_process64

    %windir%\sysnative\svchost.exe

  • state_machine

    MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCdQ5nVpJ13O9CwiQRtLOdTAwGg6oj4mvtVqZvCbSy9YyU3ngZSDBgmWjSMwrTqMvvKUr5RvigK1N00xTGT4LVtDESUaUvyGU79G24yPaF5rUOJjnAIRazosjB87DvXbI6k45HQsVyZD7wgEXnKFmv3E0Tk9ti5G0eVOKL5tqdS5QIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==

  • unknown1

    6.1158912e+08

  • unknown2

    AAAABAAAAAIAAAJYAAAAAwAAAAMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==

  • uri

    /r-arrow

  • user_agent

    Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1152) AppleWebKit/537.36 (KHTML, like Gecko)

  • watermark

    100000000

Signatures

  • Cobaltstrike

    Detected malicious payload which is part of Cobaltstrike.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious use of SetWindowsHookEx 18 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\China's_gray_zone_warfare_against_Taiwan.doc.lnk
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4304
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe" __MACOS\_params.cat.js
      2⤵
        PID:3296
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4132
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\__MACOS\_params.cat.js"
        2⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4100
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c findstr 4d534346 C:\Users\Admin\AppData\Roaming\gmhqKH.tmp > C:\Users\Admin\AppData\Roaming\wnMKDE.tmp&for /r c:\windows\system32\ %i in (*ertu*.exe) do %i -decodehex C:\Users\Admin\AppData\Roaming\wnMKDE.tmp C:\Users\Admin\AppData\Roaming\YuHSWb.tmp&expand -F:* C:\Users\Admin\AppData\Roaming\YuHSWb.tmp C:\Users\Admin\AppData\Roaming\&start C:\Users\Admin\AppData\Roaming\China's_gray_zone_warfare_against_Taiwan.doc&start C:\Users\Admin\AppData\Roaming\pfexec.exe&del C:\Users\Admin\AppData\Roaming\gmhqKH.tmp C:\Users\Admin\AppData\Roaming\wnMKDE.tmp C:\Users\Admin\AppData\Roaming\YuHSWb.tmp
          3⤵
          • Checks computer location settings
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:232
          • C:\Windows\system32\findstr.exe
            findstr 4d534346 C:\Users\Admin\AppData\Roaming\gmhqKH.tmp
            4⤵
              PID:1432
            • \??\c:\windows\system32\certutil.exe
              c:\windows\system32\certutil.exe -decodehex C:\Users\Admin\AppData\Roaming\wnMKDE.tmp C:\Users\Admin\AppData\Roaming\YuHSWb.tmp
              4⤵
                PID:808
              • C:\Windows\system32\expand.exe
                expand -F:* C:\Users\Admin\AppData\Roaming\YuHSWb.tmp C:\Users\Admin\AppData\Roaming\
                4⤵
                • Drops file in Windows directory
                PID:512
              • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
                "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Roaming\China's_gray_zone_warfare_against_Taiwan.doc" /o ""
                4⤵
                • Checks processor information in registry
                • Enumerates system info in registry
                • Suspicious behavior: AddClipboardFormatListener
                • Suspicious use of SetWindowsHookEx
                PID:860
              • C:\Users\Admin\AppData\Roaming\pfexec.exe
                C:\Users\Admin\AppData\Roaming\pfexec.exe
                4⤵
                • Executes dropped EXE
                • Loads dropped DLL
                PID:3412

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              sist02.xsl

              • Path C:\Users\Admin\AppData\Local\Temp\TCDE09F.tmp\sist02.xsl
              • Size 245KB
              • SHA256 ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353
              • MD5 SHA1 SHA512 SSDEEP

              China's_gray_zone_warfare_against_Taiwan.doc

              • Path C:\Users\Admin\AppData\Roaming\China's_gray_zone_warfare_against_Taiwan.doc
              • Size 75KB
              • SHA256 156eec85df18e7ff992a5bf35c97938557ac506c2306a8cb6633602d8a6568ed
              • MD5 SHA1 SHA512 SSDEEP

              index.dat

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat
              • Size 431B
              • SHA256 f698c343ddd4d380f3e5df57ebc2389bef035f6667f1be6069e57bd234267911
              • MD5 SHA1 SHA512

              fb3b0dbfee58fac8.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms
              • Size 3KB
              • SHA256 58c9585e316ca2780b38259b36fc43b7ba5e4884f701ad933480af6e37a6c1eb
              • MD5 SHA1 SHA512

              fb3b0dbfee58fac8.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms
              • Size 4KB
              • SHA256 d55d2d470fc657392d27e150751c1f7a010b976efe53cc1fce5666b4fdc26044
              • MD5 SHA1 SHA512 SSDEEP

              chrome_elf.dll

              • Path C:\Users\Admin\AppData\Roaming\chrome_elf.dll
              • Size 221KB
              • SHA256 fb6b0ff2da14b6447b21f0fc4ae73724667c8f6d296d707f18a28633b4e59ed0
              • MD5 SHA1 SHA512 SSDEEP

              gmhqKH.tmp

              • Path C:\Users\Admin\AppData\Roaming\gmhqKH.tmp
              • Size 1.4MB
              • SHA256 9afb6689a659f6b963d5273bab3bc7bddde88d8a00f5ee12eebffe1926b650c8
              • MD5 SHA1 SHA512 SSDEEP

              pfexec.exe

              • Path C:\Users\Admin\AppData\Roaming\pfexec.exe
              • Size 1.0MB
              • SHA256 2c9193641261c691300cff1d18f149126036da623b475dfc36fde27fca102b91
              • MD5 SHA1 SHA512 SSDEEP

              yuhswb.tmp

              • Path \??\c:\users\admin\appdata\roaming\yuhswb.tmp
              • Size 741KB
              • SHA256 2fe53a6d753eb0e288b0e514b5668ed13749227da65cd346c144c0cf8e438974
              • MD5 SHA1 SHA512 SSDEEP

              memory/860-27-0x00007FFEEDE20000-0x00007FFEEDE30000-memory.dmp

              memory/860-207-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-28-0x00007FFEEDE20000-0x00007FFEEDE30000-memory.dmp

              memory/860-24-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-208-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-209-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-206-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-22-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-21-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-20-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/860-23-0x00007FFEEFFF0000-0x00007FFEF0000000-memory.dmp

              memory/3412-53-0x0000000000D40000-0x0000000000DC8000-memory.dmp

              memory/3412-52-0x0000000000D40000-0x0000000000DC8000-memory.dmp

              memory/3412-51-0x0000000000720000-0x0000000000754000-memory.dmp