Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    30/06/2026, 14:27

General

  • Target
    2026-06-28_b9192029147e79aee2f2bd102fa316e8_amadey_cobalt-strike_elex_hellokitty_smoke-loader.exe
  • Size 170KB
  • Sample260630-rskbmsg12w
  • SHA256 62788f537c614d414fdd16496caf68ad89a62ff72086524cedecb4f4a6700e2a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • remus_stealer

C2
  • http://myrtler.biz:9549

  • http://carogra.biz:4219

  • http://youngel.biz:8768

Signatures

  • Family: Remus

    Remus is a stealer written in C++.

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Detects Reflective DLL injection artifacts 1 IoCs
  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 1 IoCs
  • Detects executables embedding registry key / value combination indicative of disabling Windows Defen 2 IoCs
  • Downloads MZ/PE file 1 IoCs
  • Sets service image path in registry 3 TTPs 2 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • Executes dropped EXE 9 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 4 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 13 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.

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
      PID:2988
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3496
      • C:\Users\Admin\AppData\Local\Temp\2026-06-28_b9192029147e79aee2f2bd102fa316e8_amadey_cobalt-strike_elex_hellokitty_smoke-loader.exe
        "C:\Users\Admin\AppData\Local\Temp\2026-06-28_b9192029147e79aee2f2bd102fa316e8_amadey_cobalt-strike_elex_hellokitty_smoke-loader.exe"
        2⤵
        • Modifies visibility of file extensions in Explorer
        • Downloads MZ/PE file
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:3040
        • C:\Users\Admin\AppData\Local\Temp\dl_240675500_0.exe
          "C:\Users\Admin\AppData\Local\Temp\dl_240675500_0.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1840
          • C:\Users\Admin\AppData\Local\Temp\ujedirez.exe
            "C:\Users\Admin\AppData\Local\Temp\ujedirez.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:4512
            • C:\Windows\system32\notepad.exe
              C:\Windows\system32\notepad.exe
              5⤵
                PID:4772
            • C:\Users\Admin\AppData\Local\Temp\yzefetgl.exe
              "C:\Users\Admin\AppData\Local\Temp\yzefetgl.exe"
              4⤵
              • Executes dropped EXE
              PID:5800
            • C:\Users\Admin\AppData\Local\Temp\ypsjelwb.exe
              "C:\Users\Admin\AppData\Local\Temp\ypsjelwb.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of WriteProcessMemory
              PID:3600
              • C:\Windows\system32\notepad.exe
                C:\Windows\system32\notepad.exe
                5⤵
                  PID:2540
            • C:\Users\Admin\AppData\Local\Temp\dl_240684578_1.exe
              "C:\Users\Admin\AppData\Local\Temp\dl_240684578_1.exe"
              3⤵
              • Executes dropped EXE
              PID:1660
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:4424
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:4484
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Services\winhost.exe
              C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Services\winhost.exe
              1⤵
              • Executes dropped EXE
              PID:2380
            • C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe
              "C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"
              1⤵
              • Sets service image path in registry
              • Executes dropped EXE
              • Suspicious behavior: LoadsDriver
              • Suspicious use of AdjustPrivilegeToken
              PID:4528
            • C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys
              C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys
              1⤵
              • Executes dropped EXE
              PID:3644
            • C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe
              "C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"
              1⤵
              • Sets service image path in registry
              • Executes dropped EXE
              • Suspicious behavior: LoadsDriver
              PID:5476

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  EmbeddedDriverService.sys

                  • Path C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys
                  • Size 34KB
                  • SHA256 70bcec00c215fe52779700f74e9bd669ff836f594df92381cbfb7ee0568e7a8b
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  WinSysKdrv.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe
                  • Size 147KB
                  • SHA256 be495b5cd25cba230cc88aa99d34f2f7b70201b7047ae7a605950756acce215c
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  dl_240675500_0.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\dl_240675500_0.exe
                  • Size 46KB
                  • SHA256 bdc4b2c8b13f3db22761c731839f71500ce440b187b2fdce7a5cc87e6ff45913
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  dl_240684578_1.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\dl_240684578_1.exe
                  • Size 265KB
                  • SHA256 a09b8f3482137394a421f6a96eaa3664f468ddfbcdf01651dae8fc0898e9a13e
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  ujedirez.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\ujedirez.exe
                  • Size 319KB
                  • SHA256 bfba9ffd723cb8aba936c02db11d71aa37838efac3ef258b9e97180c49577eaa
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  Desktop - Files.lnk

                  • Path C:\Users\Admin\Desktop\Desktop - Files.lnk
                  • Size 572B
                  • SHA256 c67bad2c5bc848f09441b12762dfc1905f60b59f19ce670d0bc0972e8158cfa0
                  • MD5 SHA1 SHA512 TLSH

                  Desktop - Files.lnk

                  • Path C:\Users\Admin\Desktop\Desktop - Files.lnk
                  • Size 1KB
                  • SHA256 ad2192c28af6f2788bf37d2b02d44713587232444573bbcdcda06d8c9b813b51
                  • MD5 SHA1 SHA512 TLSH

                  Downloads.lnk

                  • Path C:\Users\Admin\Desktop\Downloads.lnk
                  • Size 761B
                  • SHA256 2f54d7cd43c418b92347c53bfbdd2b2e94c7c6918f0e97c3e5600580c4e7efba
                  • MD5 SHA1 SHA512 TLSH

                  My Documents.lnk

                  • Path C:\Users\Admin\Desktop\My Documents.lnk
                  • Size 761B
                  • SHA256 563869e2ae75b514f6a4490f06b9cce75e6aa61ba7642d9c17f6ad009d23cd7e
                  • MD5 SHA1 SHA512 TLSH

                  Shared Photos.lnk

                  • Path C:\Users\Admin\Desktop\Shared Photos.lnk
                  • Size 761B
                  • SHA256 3ca9e8f5f74ecf050992f4a47f86e65a103114e0b59f853a32eb1199a0b84905
                  • MD5 SHA1 SHA512 TLSH

                  Work Files.lnk

                  • Path C:\Users\Admin\Desktop\Work Files.lnk
                  • Size 761B
                  • SHA256 23fc5f201f14e829588337a5765c0a321708544ba2095ca3b844bf2ac7a99ceb
                  • MD5 SHA1 SHA512 TLSH

                  memory/1840-10-0x00007FFD49C60000-0x00007FFD49EC3000-memory.dmp

                  memory/2380-38-0x00007FFD49C60000-0x00007FFD49EC3000-memory.dmp

                  memory/2988-17-0x0000020270B30000-0x0000020270B37000-memory.dmp

                  memory/2988-40-0x0000020270B30000-0x0000020270B37000-memory.dmp

                  memory/2988-11-0x000002026DFF0000-0x000002026DFF3000-memory.dmp

                  memory/2988-20-0x0000020270B30000-0x0000020270B37000-memory.dmp

                  memory/3496-19-0x0000000003C70000-0x0000000003C77000-memory.dmp

                  memory/3496-13-0x0000000003C70000-0x0000000003C77000-memory.dmp

                  memory/3496-68-0x0000000003C50000-0x0000000003C51000-memory.dmp

                  memory/3496-36-0x0000000003C90000-0x0000000003C91000-memory.dmp

                  memory/4424-75-0x000001F301C40000-0x000001F301C47000-memory.dmp

                  memory/4424-21-0x000001F301C40000-0x000001F301C47000-memory.dmp

                  memory/4424-25-0x000001F301C40000-0x000001F301C47000-memory.dmp

                  memory/4484-26-0x00000230EFA20000-0x00000230EFA27000-memory.dmp

                  memory/4484-23-0x00000230EFA20000-0x00000230EFA27000-memory.dmp

                  memory/4484-76-0x00000230EFA20000-0x00000230EFA27000-memory.dmp

                  memory/4772-35-0x0000000140000000-0x000000014003A000-memory.dmp