Analysis

  • max time kernel
    300s
  • max time network
    302s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    25/09/2026, 10:31

General

  • Target
    PO 09162026 [WeChat Attachment] Sample Pictures_November.2026 PO_doc01149201149220250116135402022090.msi
  • Size 940KB
  • Sample260925-mknxmsdd75
  • SHA256 965f7b8327a64556173a1d6045d2e13044c96fb2f39e7481eb0852741eb724ab
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Suricata alert: REMCOS RAT Malware Inbound C2 Communication 12 IoCs

    Network activity triggered a Suricata alert

  • Suricata alert: REMCOS RAT Malware Outbound C2 Communication 14 IoCs

    Network activity triggered a Suricata alert

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 16 IoCs
  • Executes a command shell one-liner 1 TTPs 4 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • outlook_office_path 1 IoCs

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I "C:\Users\Admin\AppData\Local\Temp\PO 09162026 [WeChat Attachment] Sample Pictures_November.2026 PO_doc01149201149220250116135402022090.msi"
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:2420
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4808
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3368
      • C:\Windows\system32\cmd.exe
        cmd.exe /c if /i "YES"=="YES" if not exist "ZTAKTJSDWBNLLXHW.mui" echo %RANDOM%%RANDOM%%RANDOM%> "ZTAKTJSDWBNLLXHW.mui"
        2⤵
        • Executes a command shell one-liner
        PID:3228
      • C:\Windows\system32\msiexec.exe
        msiexec.exe /x {D9D7FCD2-D41A-44BE-A643-962C8171F5EC} /qn /norestart
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:5224
      • C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.EXE
        "C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.EXE" "C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.ttf"
        2⤵
        • Suricata alert: REMCOS RAT Malware Inbound C2 Communication
        • Suricata alert: REMCOS RAT Malware Outbound C2 Communication
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        PID:3488
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c whoami
          3⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:5760
          • C:\Windows\system32\whoami.exe
            whoami
            4⤵
              PID:1256
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c schtasks /query /tn "ZTAKTJSDWBNLLXHW" 2>nul
            3⤵
            • Executes a command shell one-liner
            • Suspicious use of WriteProcessMemory
            PID:2772
            • C:\Windows\system32\schtasks.exe
              schtasks /query /tn "ZTAKTJSDWBNLLXHW"
              4⤵
                PID:2900
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c schtasks /create /sc minute /mo 15 /tn "ZTAKTJSDWBNLLXHW" /tr "cmd /c \"C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\WHXLLNBWDSJTKATZ.url\"" /ru "szapmtop\admin" /f /it
              3⤵
              • Executes a command shell one-liner
              • Suspicious use of WriteProcessMemory
              PID:4084
              • C:\Windows\system32\schtasks.exe
                schtasks /create /sc minute /mo 15 /tn "ZTAKTJSDWBNLLXHW" /tr "cmd /c \"C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\WHXLLNBWDSJTKATZ.url\"" /ru "szapmtop\admin" /f /it
                4⤵
                • Scheduled Task/Job: Scheduled Task
                PID:760
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Checks SCSI registry key(s)
          • Suspicious use of AdjustPrivilegeToken
          PID:2504
        • C:\Windows\system32\cmd.exe
          cmd
          1⤵
            PID:1368

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                e59d028.rbs

                • Path C:\Config.Msi\e59d028.rbs
                • Size 8KB
                • SHA256 784d0df41931eb251aeb4332d281ee8dde73db812bdcf3055d984f6658f22078
                • MD5 SHA1 SHA512 SSDEEP TLSH

                e59d02c.rbs

                • Path C:\Config.Msi\e59d02c.rbs
                • Size 7KB
                • SHA256 8465271c78063ec0d226e2c5f0d68099dd55949d40c38f490676b069500bada0
                • MD5 SHA1 SHA512 SSDEEP TLSH

                ZTAKTJSDWBNLLXHW.exe

                • Path C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.exe
                • Size 467KB
                • SHA256 52f0c0230b580e2fdf53a378b5c6d0db9829af900dae43e0df8f18635cd9f0c1
                • MD5 SHA1 SHA512 SSDEEP TLSH

                ZTAKTJSDWBNLLXHW.mui

                • Path C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.mui
                • Size 16B
                • SHA256 18c3ed780781f13aa16719d063959b3a7735d9652ba1e775f28c0cad8518dcfe
                • MD5 SHA1 SHA512

                ZTAKTJSDWBNLLXHW.ttf

                • Path C:\Users\Admin\Documents\ZTAKTJSDWBNLLXHW\ZTAKTJSDWBNLLXHW.ttf
                • Size 1.1MB
                • SHA256 5e7625fa441b6ad330e1132a4b9d6dcbe8dea09c35e7b927049325da2c41ef37
                • MD5 SHA1 SHA512 SSDEEP TLSH

                e59d029.msi

                • Path C:\Windows\Installer\e59d029.msi
                • Size 940KB
                • SHA256 965f7b8327a64556173a1d6045d2e13044c96fb2f39e7481eb0852741eb724ab
                • MD5 SHA1 SHA512 SSDEEP TLSH

                metadata-2

                • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                • Size 26.1MB
                • SHA256 1ee2f6677e39144a23326637d8364fd85fb814e2bad2eb5913743d19d1b40669
                • MD5 SHA1 SHA512 SSDEEP TLSH

                {9e3e9eaf-034a-46c2-b6e8-10c61a1719fb}_OnDiskSnapshotProp

                • Path \??\Volume{e42a0d43-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{9e3e9eaf-034a-46c2-b6e8-10c61a1719fb}_OnDiskSnapshotProp
                • Size 6KB
                • SHA256 c90c290ddbf41ed71abc07d6a4d6cf98c0f7d447fc5b252380992cedfd380816
                • MD5 SHA1 SHA512 SSDEEP TLSH

                memory/3488-35-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-29-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-59-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-58-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-57-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-56-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-55-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-54-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-53-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-52-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-51-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-50-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-77-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-62-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-60-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-49-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-48-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-47-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-46-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-45-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-44-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-43-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-42-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-41-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-40-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-39-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-38-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-37-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-31-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-34-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-36-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-33-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-78-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-32-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-27-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-26-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-25-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-24-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-23-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-28-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-30-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-76-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-87-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-86-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-85-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-84-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-83-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-82-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-81-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-80-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-79-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-75-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-74-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-72-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-71-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-70-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-69-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-68-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-67-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-66-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-65-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-64-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-63-0x000000002A4F0000-0x000000002A500000-memory.dmp

                memory/3488-61-0x000000002A4F0000-0x000000002A500000-memory.dmp