Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250502-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/05/2025, 06:04

General

  • Target
    HYDRA.exe
  • Size 2.6MB
  • Sample250504-gspagsen21
  • 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:3400
    • 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:1772
      • 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 use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2640
        • 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\g-lbx7dk.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2464
          • 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\RESB893.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCB892.tmp"
            5⤵
              PID:2744
      • 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:2932
      • 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:2008
        • 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:3396
          • 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:1104
      • 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:5044
        • C:\Windows\SysWOW64\explorer.exe
          explorer.exe
          3⤵
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:4736
      • 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:3076
        • 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:1696
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Microsoft\fdufwcba\crjhgtjt.exe
      1⤵
        PID:3176

      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

            RESB893.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RESB893.tmp
            • Size 1KB
            • SHA256 948a53635a1a6b0666e47efdb61f5fdbad7d3ef8c7f17f6520c31d43daba49e5
            • MD5 SHA1 SHA512

            __PSScriptPolicyTest_u2111qvt.p3f.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u2111qvt.p3f.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            g-lbx7dk.dll

            • Path C:\Users\Admin\AppData\Local\Temp\g-lbx7dk.dll
            • Size 5KB
            • SHA256 613b9e5150cedbc621d953143330bd2b97d0f8d728b7db348f65892ba70ac55f
            • MD5 SHA1 SHA512 SSDEEP

            g-lbx7dk.pdb

            • Path C:\Users\Admin\AppData\Local\Temp\g-lbx7dk.pdb
            • Size 7KB
            • SHA256 3f82bd21f52a28bd5a79ba4d20d18c1c065ab27dc62369505369808872b0be24
            • 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

            CSCB892.tmp

            • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCB892.tmp
            • Size 652B
            • SHA256 d7b3a21a1db03e07d010b4a8db22f2a876e73869516d5cef33e531e0cd4e7a08
            • MD5 SHA1 SHA512

            g-lbx7dk.0.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\g-lbx7dk.0.cs
            • Size 4KB
            • SHA256 0b3a3f8f11eb6f50fe67943f2b73c5824614f31c2e0352cc234927d7cb1a52e0
            • MD5 SHA1 SHA512 SSDEEP

            g-lbx7dk.cmdline

            • Path \??\c:\Users\Admin\AppData\Local\Temp\g-lbx7dk.cmdline
            • Size 309B
            • SHA256 4790cb2a6bb1ad8ec8e9c5b271ce8e3d3691a8959cf39c04c85177f390be98f0
            • MD5 SHA1 SHA512

            memory/1696-116-0x0000000007C50000-0x0000000007CC6000-memory.dmp

            memory/1696-112-0x00000000064B0000-0x0000000006804000-memory.dmp

            memory/1696-113-0x0000000006910000-0x000000000692E000-memory.dmp

            memory/1696-114-0x0000000006C50000-0x0000000006C9C000-memory.dmp

            memory/1696-115-0x0000000006EF0000-0x0000000006F34000-memory.dmp

            memory/1696-98-0x0000000003010000-0x0000000003046000-memory.dmp

            memory/1696-117-0x0000000008350000-0x00000000089CA000-memory.dmp

            memory/1696-118-0x0000000007CD0000-0x0000000007CEA000-memory.dmp

            memory/1696-102-0x0000000006340000-0x00000000063A6000-memory.dmp

            memory/1696-101-0x0000000006260000-0x00000000062C6000-memory.dmp

            memory/1696-100-0x0000000005960000-0x0000000005982000-memory.dmp

            memory/1696-99-0x0000000005AC0000-0x00000000060E8000-memory.dmp

            memory/1772-53-0x0000000000400000-0x000000000047B000-memory.dmp

            memory/2640-58-0x000000001B610000-0x000000001BADE000-memory.dmp

            memory/2640-59-0x000000001BB80000-0x000000001BC1C000-memory.dmp

            memory/2640-60-0x000000001BC20000-0x000000001BC28000-memory.dmp

            memory/2640-74-0x000000001BC40000-0x000000001BC48000-memory.dmp

            memory/2932-14-0x0000000000400000-0x000000000041C000-memory.dmp

            memory/3076-79-0x0000000000400000-0x0000000000485000-memory.dmp

            memory/3076-97-0x0000000000400000-0x0000000000485000-memory.dmp

            memory/4736-82-0x0000000000810000-0x000000000081A000-memory.dmp

            memory/4736-80-0x0000000000B90000-0x0000000000FC3000-memory.dmp

            memory/4736-81-0x0000000000B90000-0x0000000000FC3000-memory.dmp

            memory/4736-92-0x0000000000810000-0x000000000081A000-memory.dmp

            memory/4736-94-0x0000000000810000-0x000000000081A000-memory.dmp

            memory/5044-78-0x0000000000110000-0x000000000011A000-memory.dmp

            memory/5044-88-0x0000000000110000-0x000000000011A000-memory.dmp

            memory/5044-24-0x0000000000110000-0x000000000011A000-memory.dmp

            memory/5044-20-0x0000000000400000-0x0000000000404000-memory.dmp

            memory/5044-21-0x0000000000110000-0x000000000011A000-memory.dmp