Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    26/06/2026, 12:16

General

  • Target
    file.exe
  • Size 170KB
  • Sample260626-pflmtsa15x
  • SHA256 f2b4f9ac25b35389294ade3fcfe8a8bb5dc1f0e283c5be145a28bd785e993906
  • 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
  • Downloads MZ/PE file 1 IoCs
  • Sets service image path in registry 3 TTPs 1 IoCs

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

  • Executes dropped EXE 6 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 1 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 14 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of UnmapMainImage 1 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.

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
      PID:2096
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of UnmapMainImage
      • Suspicious use of WriteProcessMemory
      PID:3464
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.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:1156
        • C:\Users\Admin\AppData\Local\Temp\0_240719265.exe
          "C:\Users\Admin\AppData\Local\Temp\0_240719265.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4392
          • C:\Users\Admin\AppData\Local\Temp\bozuniby.exe
            "C:\Users\Admin\AppData\Local\Temp\bozuniby.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:1816
            • C:\Windows\system32\notepad.exe
              C:\Windows\system32\notepad.exe
              5⤵
                PID:5244
          • C:\Users\Admin\AppData\Local\Temp\1_240723093.exe
            "C:\Users\Admin\AppData\Local\Temp\1_240723093.exe"
            3⤵
            • Executes dropped EXE
            PID:2212
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
          PID:4356
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:4408
          • 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:5908
          • 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:1380
          • C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys
            C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys
            1⤵
            • Executes dropped EXE
            PID:1796

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                0_240719265.exe

                • Path C:\Users\Admin\AppData\Local\Temp\0_240719265.exe
                • Size 43KB
                • SHA256 9ef81e30de63b209b970c48d63f893cedb17f958cd9bafebf27cca6aee4eaa48
                • MD5 SHA1 SHA512 SSDEEP TLSH

                1_240723093.exe

                • Path C:\Users\Admin\AppData\Local\Temp\1_240723093.exe
                • Size 265KB
                • SHA256 a09b8f3482137394a421f6a96eaa3664f468ddfbcdf01651dae8fc0898e9a13e
                • MD5 SHA1 SHA512 SSDEEP TLSH

                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

                bozuniby.exe

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

                Desktop - Files.lnk

                • Path C:\Users\Admin\Desktop\Desktop - Files.lnk
                • Size 572B
                • SHA256 8244aae5a51d6a752b620cf6cfb20f85935bd873614631758f8788e55905c062
                • MD5 SHA1 SHA512 TLSH

                Desktop - Files.lnk

                • Path C:\Users\Admin\Desktop\Desktop - Files.lnk
                • Size 927B
                • SHA256 824a2a9fad1de6f0f131aa4613503735d03c94e0e010bca8099fc8710856f8f8
                • MD5 SHA1 SHA512 TLSH

                Downloads.lnk

                • Path C:\Users\Admin\Desktop\Downloads.lnk
                • Size 761B
                • SHA256 32efa48314b52c65896a74fe63541bef52c353c37ea0221f7b8f666a8742beb4
                • MD5 SHA1 SHA512 TLSH

                My Documents.lnk

                • Path C:\Users\Admin\Desktop\My Documents.lnk
                • Size 761B
                • SHA256 3c781fdd0715eb3d02030fc018794326ed02814f621b61b157507cc6b82b8d64
                • MD5 SHA1 SHA512 TLSH

                Shared Photos.lnk

                • Path C:\Users\Admin\Desktop\Shared Photos.lnk
                • Size 761B
                • SHA256 889fab54cae744dc9d92188b55ea4143d85ad8918e4c639477bfc18e24b4714a
                • MD5 SHA1 SHA512 TLSH

                Work Files.lnk

                • Path C:\Users\Admin\Desktop\Work Files.lnk
                • Size 761B
                • SHA256 f973c980203b055490b28858ab8fbd111f157caa28f8551449b74e6b42b38f78
                • MD5 SHA1 SHA512 TLSH

                memory/2096-17-0x000001C83F300000-0x000001C83F307000-memory.dmp

                memory/2096-76-0x000001C83F300000-0x000001C83F307000-memory.dmp

                memory/2096-11-0x000001C83F2F0000-0x000001C83F2F3000-memory.dmp

                memory/2096-20-0x000001C83F300000-0x000001C83F307000-memory.dmp

                memory/3464-27-0x0000000003360000-0x0000000003361000-memory.dmp

                memory/3464-68-0x0000000003370000-0x0000000003371000-memory.dmp

                memory/3464-19-0x0000000003340000-0x0000000003347000-memory.dmp

                memory/3464-15-0x0000000003340000-0x0000000003347000-memory.dmp

                memory/4356-25-0x000001E40DFF0000-0x000001E40DFF7000-memory.dmp

                memory/4356-21-0x000001E40DFF0000-0x000001E40DFF7000-memory.dmp

                memory/4356-77-0x000001E40DFF0000-0x000001E40DFF7000-memory.dmp

                memory/4392-10-0x00007FFBC8CA0000-0x00007FFBC8F03000-memory.dmp

                memory/4408-26-0x0000021BEAC20000-0x0000021BEAC27000-memory.dmp

                memory/4408-78-0x0000021BEAC20000-0x0000021BEAC27000-memory.dmp

                memory/4408-23-0x0000021BEAC20000-0x0000021BEAC27000-memory.dmp

                memory/5244-89-0x0000000140000000-0x000000014003A000-memory.dmp

                memory/5908-29-0x00007FFBC8CA0000-0x00007FFBC8F03000-memory.dmp