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Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2025, 04:37

General

  • Target
    HYDRA.exe
  • Size 2.6MB
  • Sample250526-e88mysdj21
  • SHA256 f8c17cb375e8ccad5b0e33dae65694a1bd628f91cac6cf65dd11f50e91130c2d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2017

C2
  • http://92.53.105.14/

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Smokeloader family
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

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

  • 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 64 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HYDRA.exe
    "C:\Users\Admin\AppData\Local\Temp\HYDRA.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:540
    • C:\Users\Admin\AppData\Roaming\yaya.exe
      C:\Users\Admin\AppData\Roaming\yaya.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3568
      • C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
        "C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2244
        • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\krqbdyi7.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:5040
          • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES9DE7.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC9DE6.tmp"
            5⤵
              PID:1896
      • C:\Users\Admin\AppData\Roaming\va.exe
        C:\Users\Admin\AppData\Roaming\va.exe
        2⤵
        • Drops startup file
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3692
      • C:\Users\Admin\AppData\Roaming\ufx.exe
        C:\Users\Admin\AppData\Roaming\ufx.exe
        2⤵
        • Checks computer location settings
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3616
        • C:\ProgramData\ucp\usc.exe
          "C:\ProgramData\ucp\usc.exe" /ucp/usc.exe
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3832
          • C:\Windows\SysWOW64\SCHTASKS.exe
            SCHTASKS /Create /SC MINUTE /MO 10 /F /TN SystemOptimize /TR C:\ProgramData\ucp\usc.exe
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:1244
      • C:\Users\Admin\AppData\Roaming\sant.exe
        C:\Users\Admin\AppData\Roaming\sant.exe
        2⤵
        • Executes dropped EXE
        • Maps connected drives based on registry
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3172
        • C:\Windows\SysWOW64\explorer.exe
          explorer.exe
          3⤵
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:1372
      • C:\Users\Admin\AppData\Roaming\power.exe
        C:\Users\Admin\AppData\Roaming\power.exe
        2⤵
        • Checks computer location settings
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5032
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1504
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Microsoft\cwattbwv\ughftjvu.exe
      1⤵
        PID:3232

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            usc.exe

            • Path C:\ProgramData\ucp\usc.exe
            • Size 4.0MB
            • SHA256 84d7fd0a93d963e9808212917f79fe2d485bb7fbc94ee374a141bbd15da725b7
            • MD5 SHA1 SHA512 SSDEEP

            RES9DE7.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RES9DE7.tmp
            • Size 1KB
            • SHA256 d11a58bafffd2788ee50437387eb0bfee759209edac18556a642c333373776a4
            • MD5 SHA1 SHA512

            __PSScriptPolicyTest_mg3bxltp.01e.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mg3bxltp.01e.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            krqbdyi7.dll

            • Path C:\Users\Admin\AppData\Local\Temp\krqbdyi7.dll
            • Size 5KB
            • SHA256 8ace269a86638320d573b2d43e485cf8126e9de14d70fb9c26e54297348a7f43
            • MD5 SHA1 SHA512 SSDEEP

            krqbdyi7.pdb

            • Path C:\Users\Admin\AppData\Local\Temp\krqbdyi7.pdb
            • Size 7KB
            • SHA256 c4e6024725510b37b0695101ce38942ac50bb3e0dda69f80f7d4b2c67be66d8d
            • MD5 SHA1 SHA512 SSDEEP

            power.exe

            • Path C:\Users\Admin\AppData\Roaming\power.exe
            • Size 507KB
            • SHA256 1bee45423044b5a6bf0ad0dd2870117824b000784ce81c5f8a1b930bb8bc0465
            • MD5 SHA1 SHA512 SSDEEP

            sant.exe

            • Path C:\Users\Admin\AppData\Roaming\sant.exe
            • Size 12KB
            • SHA256 3fd826fc0c032721466b94ab3ec7dcfe006cc284e16132af6b91dfbc064b0907
            • MD5 SHA1 SHA512 SSDEEP

            ufx.exe

            • Path C:\Users\Admin\AppData\Roaming\ufx.exe
            • Size 960KB
            • SHA256 9e3826138bacac89845c26278f52854117db1652174c1c76dbb2bd24f00f4973
            • MD5 SHA1 SHA512 SSDEEP

            va.exe

            • Path C:\Users\Admin\AppData\Roaming\va.exe
            • Size 88KB
            • SHA256 3139bf3c4b958c3a019af512aecdb8161b9d6d7432d2c404abda3f42b63f34f1
            • MD5 SHA1 SHA512 SSDEEP

            yaya.exe

            • Path C:\Users\Admin\AppData\Roaming\yaya.exe
            • Size 1.7MB
            • SHA256 5c32e0d2a69fd77e85f2eecaabeb677b6f816de0d82bf7c29c9d124a818f424f
            • MD5 SHA1 SHA512 SSDEEP

            starter.exe

            • Path C:\Windows\Temp\{1945BBS40-8571-3DA1-BB29-HYDRA7A13A1E}\starter.exe
            • Size 80KB
            • SHA256 990dffdc0694858514d6d7ff7fff5dc9f48fab3aa35a4d9301d94fc57e346446
            • MD5 SHA1 SHA512 SSDEEP

            CSC9DE6.tmp

            • Path \??\c:\Users\Admin\AppData\Local\Temp\CSC9DE6.tmp
            • Size 652B
            • SHA256 8b3cefa8ffd0e2a6b3f079de25892707f043d6a176956a320f08e34b69f2f9d4
            • MD5 SHA1 SHA512

            krqbdyi7.0.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\krqbdyi7.0.cs
            • Size 4KB
            • SHA256 0b3a3f8f11eb6f50fe67943f2b73c5824614f31c2e0352cc234927d7cb1a52e0
            • MD5 SHA1 SHA512 SSDEEP

            krqbdyi7.cmdline

            • Path \??\c:\Users\Admin\AppData\Local\Temp\krqbdyi7.cmdline
            • Size 309B
            • SHA256 8b0da24adac45e4a80901e5d631b47e955f87f489a86538e1b0a787662c1902c
            • MD5 SHA1 SHA512

            memory/1372-99-0x0000000000940000-0x0000000000D73000-memory.dmp

            memory/1372-100-0x0000000000940000-0x0000000000D73000-memory.dmp

            memory/1372-101-0x0000000000FB0000-0x0000000000FBA000-memory.dmp

            memory/1372-109-0x0000000000FB0000-0x0000000000FBA000-memory.dmp

            memory/1372-107-0x0000000000FB0000-0x0000000000FBA000-memory.dmp

            memory/1504-79-0x0000000004E50000-0x0000000005478000-memory.dmp

            memory/1504-94-0x0000000005C30000-0x0000000005C7C000-memory.dmp

            memory/1504-80-0x0000000004C30000-0x0000000004C52000-memory.dmp

            memory/1504-98-0x0000000006DA0000-0x0000000006DBA000-memory.dmp

            memory/1504-78-0x00000000022B0000-0x00000000022E6000-memory.dmp

            memory/1504-97-0x0000000007400000-0x0000000007A7A000-memory.dmp

            memory/1504-81-0x0000000004DD0000-0x0000000004E36000-memory.dmp

            memory/1504-82-0x0000000005480000-0x00000000054E6000-memory.dmp

            memory/1504-88-0x00000000055B0000-0x0000000005904000-memory.dmp

            memory/1504-96-0x0000000006D00000-0x0000000006D76000-memory.dmp

            memory/1504-93-0x0000000005C00000-0x0000000005C1E000-memory.dmp

            memory/1504-95-0x0000000006160000-0x00000000061A4000-memory.dmp

            memory/2244-73-0x000000001BC70000-0x000000001BC78000-memory.dmp

            memory/2244-58-0x000000001BBC0000-0x000000001BC5C000-memory.dmp

            memory/2244-59-0x000000001B200000-0x000000001B208000-memory.dmp

            memory/2244-57-0x000000001B6F0000-0x000000001BBBE000-memory.dmp

            memory/3172-21-0x0000000000400000-0x0000000000404000-memory.dmp

            memory/3172-22-0x0000000000120000-0x000000000012A000-memory.dmp

            memory/3172-111-0x0000000000120000-0x000000000012A000-memory.dmp

            memory/3568-49-0x0000000000400000-0x000000000047B000-memory.dmp

            memory/3692-24-0x0000000000400000-0x000000000041C000-memory.dmp

            memory/5032-77-0x0000000000400000-0x0000000000485000-memory.dmp