Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    30/09/2026, 12:54

General

  • Target
    Kleinstadt_3.5.0.14.exe
  • Size 12.1MB
  • Sample260930-p5mlesff89
  • SHA256 38af609ca6d6e40e2feb589d48f99b8b2a28f77d3f4f66ef7b431655ef584223
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 58 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Program Files directory 49 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • 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 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Kleinstadt_3.5.0.14.exe
    "C:\Users\Admin\AppData\Local\Temp\Kleinstadt_3.5.0.14.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:4752
  • C:\Program Files (x86)\Signalsoft\Kleinstadt\Kleinstadt.exe
    "C:\Program Files (x86)\Signalsoft\Kleinstadt\Kleinstadt.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4436
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\b9fupfql.cmdline"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4732
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES4E17.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC4E16.tmp"
        3⤵
          PID:4248
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\0blb9bxt.cmdline"
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2364
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
          C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESADDB.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCADDA.tmp"
          3⤵
            PID:3660
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
          "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\jkdhqrko.cmdline"
          2⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3528
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
            C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESBCB0.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCBCAF.tmp"
            3⤵
              PID:388
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\adb0eehl.cmdline"
            2⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1120
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
              C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESBE56.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCBE55.tmp"
              3⤵
                PID:4636
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
              "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\vkxx1tsm.cmdline"
              2⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:1752
              • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
                C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESC088.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCC087.tmp"
                3⤵
                  PID:2884
            • C:\Windows\system32\mspaint.exe
              "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Desktop\ExpandAssert.bmp"
              1⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              PID:3976
            • C:\Windows\system32\svchost.exe
              C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
              1⤵
                PID:1648

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    Common.Plugins.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Common.Plugins.dll
                    • Size 7KB
                    • SHA256 e0b6457f8742ffbaf3e1e5f7eaa065ccede7d2879c065f032af06f9c3a88dbc4
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Common.Zip.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Common.Zip.dll
                    • Size 193KB
                    • SHA256 336faede896555b3d561a94381e0b2f45aafa1f4e39e4b74c446e32f6f784083
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Common.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Common.dll
                    • Size 1.2MB
                    • SHA256 afbe5a9c406179e02c53623c287366c767a18fabb40022d9cb038c0c241e14b5
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Kleinstadt.exe

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Kleinstadt.exe
                    • Size 9.0MB
                    • SHA256 dde5d28bc9d14d9daa5cd0de4b3505bc1b4bc1c9315fc62da421413a8a3cce2e
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Kleinstadt.exe.config

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Kleinstadt.exe.config
                    • Size 42KB
                    • SHA256 5d82b1cfe58b2731577f74fea17f40ff4b2a40db32b87ea4302237a0748a3702
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Microsoft.DirectX.AudioVideoPlayback.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Microsoft.DirectX.AudioVideoPlayback.dll
                    • Size 52KB
                    • SHA256 406f473429573e9f0084aae125ef8f19f59291aa4c33cf7d40e7d996995a3238
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Microsoft.DirectX.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Microsoft.DirectX.dll
                    • Size 218KB
                    • SHA256 942e98f142373547493f13b14e1603b2420851aff013d3085bada7b6b2214d9c
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Signalling.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\Signalling.dll
                    • Size 5.8MB
                    • SHA256 18dea720949c18ebe923fa06b978c51ac5086514dd0b4797f15b07e800d8e2ca
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Common.resources.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\de\Common.resources.dll
                    • Size 24KB
                    • SHA256 e68796303c94892f78e12f199c04b207b023f27572412a62005583dd0cbf0e85
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Kleinstadt.resources.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\de\Kleinstadt.resources.dll
                    • Size 3.0MB
                    • SHA256 80f2f258712dfba259382c3f26f7d98b8323bc492080be7484a7a966cf426d69
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    kleinstadt_data.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\kleinstadt_data.dll
                    • Size 1.8MB
                    • SHA256 16c1616f25d46c2b9d1d55ec83b0d9159f265867f0e8794879f781de95e16fa6
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Kleinstadt.resources.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\nl\Kleinstadt.resources.dll
                    • Size 3.0MB
                    • SHA256 550addc2d22c19e373b43498f8709a58fbc7360587a4c62ef510b87d21b84c29
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    system_de.dat

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\system_de.dat
                    • Size 1.1MB
                    • SHA256 16d36ed6bacbfff0d92cc0a2c4e90558921a87bc1f10b60d0a20eb822c62661d
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    system_de.dll

                    • Path C:\Program Files (x86)\Signalsoft\Kleinstadt\system_de.dll
                    • Size 7.0MB
                    • SHA256 bf277dd80947a51ad90bd44b727c61738fceb05f8f3ccd6784db3b51a2fa35b4
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    4dsy5fye.newcfg

                    • Path C:\Users\Admin\AppData\Local\SIGNALSOFT_Rail_Consultan\Kleinstadt.exe_Url_1wgkv33pqdczcgr3jcpexz1aq3buxb1k\3.5.0.14\4dsy5fye.newcfg
                    • Size 1KB
                    • SHA256 a6517020b8f7fc0560a9e0bb24088bc4b6d4b0a9a50385f8de7d423edb6e26bc
                    • MD5 SHA1 SHA512 TLSH

                    as3nmxyr.newcfg

                    • Path C:\Users\Admin\AppData\Local\SIGNALSOFT_Rail_Consultan\Kleinstadt.exe_Url_1wgkv33pqdczcgr3jcpexz1aq3buxb1k\3.5.0.14\as3nmxyr.newcfg
                    • Size 15KB
                    • SHA256 f327cf7269ab92751f281b6f9870ac32e57daf0d78ff4273b5eb8572c17d047f
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    bhbsdzlq.newcfg

                    • Path C:\Users\Admin\AppData\Local\SIGNALSOFT_Rail_Consultan\Kleinstadt.exe_Url_1wgkv33pqdczcgr3jcpexz1aq3buxb1k\3.5.0.14\bhbsdzlq.newcfg
                    • Size 4KB
                    • SHA256 ffc378cb2399b27e2bb51e25d45b762abaee6a6531bf1f1a92a97a343409715d
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    user.config

                    • Path C:\Users\Admin\AppData\Local\SIGNALSOFT_Rail_Consultan\Kleinstadt.exe_Url_1wgkv33pqdczcgr3jcpexz1aq3buxb1k\3.5.0.14\user.config
                    • Size 332B
                    • SHA256 7aaca253f803f1f562dc9735d108bb53d9e64109f85f3b0a88688eb190df2848
                    • MD5 SHA1 SHA512 TLSH

                    RES4E17.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\RES4E17.tmp
                    • Size 1KB
                    • SHA256 eaac70161b364890400d56a0d62bdb722f665e32d572752efc501359a6eb8cba
                    • MD5 SHA1 SHA512 TLSH

                    b9fupfql.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\b9fupfql.dll
                    • Size 10KB
                    • SHA256 49bcfc0144f29fc51c6bda89cf44cc8d33e544adb17c9de46e514400ba2d2882
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    AdvSplash.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\AdvSplash.dll
                    • Size 6KB
                    • SHA256 eb1ca2b3a6e564c32677d0cdc388e26b74ef686e071d7dbca44d0bfa10488feb
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    InstallOptions.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\InstallOptions.dll
                    • Size 14KB
                    • SHA256 c9cd5c9609e70005926ae5171726a4142ffbcccc771d307efcd195dafc1e6b4b
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    LangDLL.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\LangDLL.dll
                    • Size 5KB
                    • SHA256 60a964095af1be79f6a99b22212fefe2d16f5a0afd7e707d14394e4143e3f4f5
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    ioSpecial.ini

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\ioSpecial.ini
                    • Size 652B
                    • SHA256 348234e37cb9fc6100fb201e8c4460f7e11517ae9a068dd2cb47ab2b7b5bdacd
                    • MD5 SHA1 SHA512 TLSH

                    ioSpecial.ini

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\ioSpecial.ini
                    • Size 687B
                    • SHA256 bf0698da896b80fdad101fcbdc65c702ee13b9ffd5d0a199b7a62afdc6de5899
                    • MD5 SHA1 SHA512 TLSH

                    ioSpecial.ini

                    • Path C:\Users\Admin\AppData\Local\Temp\nsv509.tmp\ioSpecial.ini
                    • Size 664B
                    • SHA256 176499929db5ecd3ac1a33d413fa2c6ade2e427613bfd54b5e0ab39566344813
                    • MD5 SHA1 SHA512 TLSH

                    CSC4E16.tmp

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\CSC4E16.tmp
                    • Size 664B
                    • SHA256 4903e874bc9f5a6756af109c5650432a248d86f50b6d5dd2af3aad05f16b159b
                    • MD5 SHA1 SHA512 TLSH

                    b9fupfql.0.cs

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\b9fupfql.0.cs
                    • Size 16KB
                    • SHA256 9f2bda1999242f86c019d8e52a3a392836dbdd8211e724a028d4bb51e681ccfb
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    b9fupfql.cmdline

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\b9fupfql.cmdline
                    • Size 412B
                    • SHA256 24ed382dc026ceaf49feed2483430603048e02a68c0eb50f3774a6c2910bcb69
                    • MD5 SHA1 SHA512 TLSH

                    memory/4436-348-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-294-0x00000000087B0000-0x00000000087EB000-memory.dmp

                    memory/4436-323-0x0000000002200000-0x0000000002210000-memory.dmp

                    memory/4436-253-0x0000000074ED2000-0x0000000074ED4000-memory.dmp

                    memory/4436-330-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-252-0x0000000002200000-0x0000000002210000-memory.dmp

                    memory/4436-307-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-423-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-301-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-352-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4436-324-0x0000000074ED2000-0x0000000074ED4000-memory.dmp

                    memory/4436-365-0x000000000EC60000-0x000000000EC9B000-memory.dmp

                    memory/4436-396-0x0000000016AD0000-0x0000000016B32000-memory.dmp

                    memory/4732-283-0x0000000074ED0000-0x0000000075481000-memory.dmp

                    memory/4732-276-0x0000000074ED0000-0x0000000075481000-memory.dmp