Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250619-en
  • resource tags

    arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    12/10/2025, 23:35

General

  • Target
    1109118734xlsx.exe
  • Size 1.4MB
  • Sample251012-3lch1agn2x
  • SHA256 d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Version
  • 7.0.4 Pro

C2
  • 196.251.72.34:2404

Signatures

  • Remcos

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

  • Remcos family
  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 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 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1109118734xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\1109118734xlsx.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:5304
    • C:\Users\Admin\AppData\Local\Temp\1109118734xlsx.exe
      "C:\Users\Admin\AppData\Local\Temp\1109118734xlsx.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:980
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3104
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of NtCreateThreadExHideFromDebugger
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3772
          • C:\Windows\SysWOW64\rmclient.exe
            /stext "C:\Users\Admin\AppData\Local\Temp\shanurqqz"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:5512
          • C:\Windows\SysWOW64\rmclient.exe
            /stext "C:\Users\Admin\AppData\Local\Temp\ubfyvkbrnzjc"
            5⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:228
          • C:\Windows\SysWOW64\rmclient.exe
            /stext "C:\Users\Admin\AppData\Local\Temp\fdsqwcllbhbhbra"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1800

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        remcos.exe

        • Path C:\ProgramData\Remcos\remcos.exe
        • Size 1.4MB
        • SHA256 d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
        • MD5 SHA1 SHA512 SSDEEP

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 63a69f31456bc89ccfe4d3f3e1c08649d6c03c51341e69d34ff21bc64ee8b6de
        • MD5 SHA1 SHA512

        4FA45AE1010E09657982D8D28B3BD38E_9315E4FBFFAA12EEEACE5426EDECDDAA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\4FA45AE1010E09657982D8D28B3BD38E_9315E4FBFFAA12EEEACE5426EDECDDAA
        • Size 471B
        • SHA256 47b8945d4edf513a10bce1cb9f7938713ca63134386e514fd995a8bd3b97ce0d
        • MD5 SHA1 SHA512

        C02877841121CC45139CB51404116B25_9D542CAC432A9A6061272F1B424E796B

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C02877841121CC45139CB51404116B25_9D542CAC432A9A6061272F1B424E796B
        • Size 471B
        • SHA256 7c90e6933c6657bc2d4c3c1a1567400868ebd722d9ff84d02d649a95c39345fd
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 ea27e0f67b24cee1dcc5b33338699787203a8991270c70d49c27f211516e2de1
        • MD5 SHA1 SHA512

        4FA45AE1010E09657982D8D28B3BD38E_9315E4FBFFAA12EEEACE5426EDECDDAA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\4FA45AE1010E09657982D8D28B3BD38E_9315E4FBFFAA12EEEACE5426EDECDDAA
        • Size 402B
        • SHA256 c1eb380fd641602f429f19e8b4d13eaa3ef82e246094c33e167feb70d05321e0
        • MD5 SHA1 SHA512

        C02877841121CC45139CB51404116B25_9D542CAC432A9A6061272F1B424E796B

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C02877841121CC45139CB51404116B25_9D542CAC432A9A6061272F1B424E796B
        • Size 406B
        • SHA256 b11f7ad3bde7ba8ef98c707b7e3ba891dcff64698fbd0487c8c52afcd2e7f2a1
        • MD5 SHA1 SHA512

        nscB346.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nscB346.tmp
        • Size 20B
        • SHA256 c152946d88097adcbbeb52acd3782c8d106f88dfafc7c9af47f67e67ba33854a
        • MD5 SHA1 SHA512

        nscB346.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nscB346.tmp
        • Size 22B
        • SHA256 b1cf0c961cc0706922ed4e40300fbde987d521b47a778d61ad809684b5a16a35
        • MD5 SHA1 SHA512

        nscB346.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nscB346.tmp
        • Size 38B
        • SHA256 1feb2f5544655440d6bdf724776f3fc7b9c9dfb226fe96385423579e03954626
        • MD5 SHA1 SHA512

        nscB346.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nscB346.tmp
        • Size 43B
        • SHA256 5c9b9d544efddd32a858390c7f0f7123f4b06e201de44f6e59397d49bac23f42
        • MD5 SHA1 SHA512

        nscB346.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nscB346.tmp
        • Size 52B
        • SHA256 a9493973dd293917f3ebb932ab255f8cac40121707548de100d5969956bb1266
        • MD5 SHA1 SHA512

        nse6BFC.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nse6BFC.tmp
        • Size 18B
        • SHA256 0910aef0152e26373651bd0550d8d61e3f1e72820e69c3fec56ae50cd225a493
        • MD5 SHA1 SHA512

        nse6BFC.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nse6BFC.tmp
        • Size 35B
        • SHA256 8c876ae7916572fa02c0c9841d47358f549363bda4f2879944e44c250f29e431
        • MD5 SHA1 SHA512

        nse6BFC.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nse6BFC.tmp
        • Size 37B
        • SHA256 9c719d5b57ba39eeac8bb3dc66e5e4116e6df0d13708c46dbb0df2a89b50467d
        • MD5 SHA1 SHA512

        nsj6B30.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsj6B30.tmp
        • Size 65B
        • SHA256 2bad3065546719b1e5ff58cb7ca6231b6cb669fb1fd06fb30102e9df00d63e60
        • MD5 SHA1 SHA512

        nsj6B30.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsj6B30.tmp
        • Size 74B
        • SHA256 d3c781a1855c8a70f5aca88d9e2c92afffa80541334731f62caa9494aa8a0c36
        • MD5 SHA1 SHA512

        nsj6B30.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsj6B30.tmp
        • Size 16B
        • SHA256 ccaabed14663822955f3eed5f5ebac067cbb8c0ff9734a67d30fb94a14826237
        • MD5 SHA1 SHA512

        nsj6B30.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsj6B30.tmp
        • Size 41B
        • SHA256 8b0454c42dded71d9ee62354260d89e0565bb803a300bb2c49c9dd50fd2d1c4b
        • MD5 SHA1 SHA512

        nsj6B30.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsj6B30.tmp
        • Size 35B
        • SHA256 65dd548600ae0d7d0fd7e126181efd7667b5d02c1ece19742c66ab4f31155c91
        • MD5 SHA1 SHA512

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nso6A16.tmp\System.dll
        • Size 12KB
        • SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
        • MD5 SHA1 SHA512 SSDEEP

        nsp6D27.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsp6D27.tmp
        • Size 56B
        • SHA256 4f1e2be713aaf65486d0f84c5ef4d5c528e10f3782a33d651bfc4e7191cc974c
        • MD5 SHA1 SHA512

        nsq6E13.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsq6E13.tmp
        • Size 30B
        • SHA256 1d41c63746052d97c9c35d167d50555630076dd85a19b594d01fca87eb44fbac
        • MD5 SHA1 SHA512

        nssB2B9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB2B9.tmp
        • Size 47B
        • SHA256 4d9933ad3cb07723bac43a5c519fb12e5950334cf688b284acdfa4d8931d5620
        • MD5 SHA1 SHA512

        nssB2B9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB2B9.tmp
        • Size 61B
        • SHA256 706dc879eaaeee6ada053cfd98acedee299c07a8dc98f0cc024cc614057c38b6
        • MD5 SHA1 SHA512

        nssB441.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB441.tmp
        • Size 33B
        • SHA256 70465829d1e74e80bac22f73d185e4ff5da110f3a74d5be7e5d1a59666a7340d
        • MD5 SHA1 SHA512

        nssB441.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB441.tmp
        • Size 38B
        • SHA256 9fe1032339b19e8c55b7cbb793f1a8d6460767ce978a59518ea09e050e109d17
        • MD5 SHA1 SHA512

        nssB441.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB441.tmp
        • Size 48B
        • SHA256 8abf25d3880dfe36e77025403e079d54c473e33b370de6338782f391b9804e3f
        • MD5 SHA1 SHA512

        nssB441.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nssB441.tmp
        • Size 57B
        • SHA256 4bfdf527d4d81873f6769b406107971061e9ab94e950e59fd298fa8b35874f8e
        • MD5 SHA1 SHA512

        nsu6CA9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsu6CA9.tmp
        • Size 32B
        • SHA256 ceeb92547e79d6c9e1f9425e4d050b18cb9766a6f62dae971f2edf6305784996
        • MD5 SHA1 SHA512

        nsu6CA9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsu6CA9.tmp
        • Size 29B
        • SHA256 f2b723416cc41c59b870a8fbbe8ecab3cd0cf2298902649a50668b1b88e6e835
        • MD5 SHA1 SHA512

        nsu6CA9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsu6CA9.tmp
        • Size 42B
        • SHA256 c2b0df3f0871148fb1324bfc31c2c574ecfc13ade978d5c81be4ea3211cb78c1
        • MD5 SHA1 SHA512

        nsu6CA9.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsu6CA9.tmp
        • Size 60B
        • SHA256 12e888e88390daf9cb99a72e1cd762abe726e0aa5c63e1bbc9d71f4a8315544a
        • MD5 SHA1 SHA512

        nsyB54C.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsyB54C.tmp
        • Size 46B
        • SHA256 e888b934c4e28abf7d62a3348e459883c2123a2e911ce8e0d4d134bb76c75f14
        • MD5 SHA1 SHA512

        nsyB637.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\nsyB637.tmp
        • Size 17B
        • SHA256 96f0ffcdf2308d036f51f1fad5fb1e501f7137ab3c010c165210530c105d9be4
        • MD5 SHA1 SHA512

        shanurqqz

        • Path C:\Users\Admin\AppData\Local\Temp\shanurqqz
        • Size 2B
        • SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
        • MD5 SHA1 SHA512

        Nyetableringens.Qui

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\Nyetableringens.Qui
        • Size 43KB
        • SHA256 55ed6c3f65e02aa647b06368a86acb3b498ebb2f9af9ea1b0fe00e1b9b7c1119
        • MD5 SHA1 SHA512 SSDEEP

        Offentlighedsfaserne.txt

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\Offentlighedsfaserne.txt
        • Size 524B
        • SHA256 acca862fbaa8a466d5f0ce227947ab4b4d81042255416f2bc88fa875aba76770
        • MD5 SHA1 SHA512

        Xyrichthys.ini

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\Xyrichthys.ini
        • Size 558B
        • SHA256 306c298a1891ae09c8e8e03bdd2a9c41b8806ebd0ab25c85b0e7130ef8cceb1b
        • MD5 SHA1 SHA512

        ajivas.txt

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\ajivas.txt
        • Size 463B
        • SHA256 9d1dd62b75ced942bec84bfd2c35bac3bd5f9c96526e2a93f49f63808e032104
        • MD5 SHA1 SHA512

        forklende.ini

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\forklende.ini
        • Size 334B
        • SHA256 0a9679e86832fcfbc92ea2b946da50acd0fa82d80da628d1eefb685450a40e7c
        • MD5 SHA1 SHA512

        omlssendes.pen

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\omlssendes.pen
        • Size 485KB
        • SHA256 0b7700298685311aeca504dfed9f0b4ea7f15dd71240c834f83067fef302e8f0
        • MD5 SHA1 SHA512 SSDEEP

        tidsperiodes.rnn

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Mangelen\Skos\tidsperiodes.rnn
        • Size 6.6MB
        • SHA256 0d8c84c95c4af8437442d8c367c934ac5da8dec7bef277ebcfc1ee868b11f299
        • MD5 SHA1 SHA512 SSDEEP

        memory/228-1193-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/228-1201-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/980-568-0x0000000077C2B000-0x0000000077C2C000-memory.dmp

        memory/980-594-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/980-582-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/980-567-0x0000000077B98000-0x0000000077B99000-memory.dmp

        memory/1800-1199-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/1800-1194-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/3772-1209-0x0000000035880000-0x0000000035899000-memory.dmp

        memory/3772-1210-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1218-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1217-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1205-0x0000000035880000-0x0000000035899000-memory.dmp

        memory/3772-1179-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1208-0x0000000035880000-0x0000000035899000-memory.dmp

        memory/3772-1192-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1211-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1212-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1213-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1214-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1215-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/3772-1216-0x00000000004D0000-0x00000000017E7000-memory.dmp

        memory/5304-566-0x0000000074945000-0x0000000074946000-memory.dmp

        memory/5512-1203-0x0000000000400000-0x0000000000482000-memory.dmp