Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-1703_x64
  • resource
    win10-20230831-en
  • resource tags

    arch:x64arch:x86image:win10-20230831-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25/09/2023, 05:50

General

  • Target
    b290e30290a9ed3bd4f931403258a43c3b326a183311a29478e6a822ca543a4a.exe
  • Size 270KB
  • Sample230925-gj18pace7x
  • SHA256 b290e30290a9ed3bd4f931403258a43c3b326a183311a29478e6a822ca543a4a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2022

C2
  • http://77.91.68.29/fks/

rc4.i32
rc4.i32

Signatures

  • Detected google phishing page
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 7 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 54 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 29 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:\Users\Admin\AppData\Local\Temp\b290e30290a9ed3bd4f931403258a43c3b326a183311a29478e6a822ca543a4a.exe
    "C:\Users\Admin\AppData\Local\Temp\b290e30290a9ed3bd4f931403258a43c3b326a183311a29478e6a822ca543a4a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3996
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
        PID:3100
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
        2⤵
        • Checks SCSI registry key(s)
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        PID:2496
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 172
        2⤵
        • Program crash
        PID:2300
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\B0FC.bat" "
      1⤵
      • Checks computer location settings
      PID:2364
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:4864
    • C:\Windows\system32\browser_broker.exe
      C:\Windows\system32\browser_broker.exe -Embedding
      1⤵
      • Modifies Internet Explorer settings
      PID:1900
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4344
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:660
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      PID:3640
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      PID:4920
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      PID:4068
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      PID:4992
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:1836
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:4960
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:436

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          edgecompatviewlist[1].xml

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\IV18IXVA\edgecompatviewlist[1].xml
          • Size 74KB
          • SHA256 853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1
          • MD5 SHA1 SHA512 SSDEEP

          B8BxsscfVBr[1].ico

          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\DIBYZ3Q8\B8BxsscfVBr[1].ico
          • Size 1KB
          • SHA256 e6d1d77403cd9f14fd2377d07e84350cfe768e3353e402bf42ebdc8593a58c9a
          • MD5 SHA1 SHA512

          suggestions[1].en-US

          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\N0TR0DXO\suggestions[1].en-US
          • Size 17KB
          • SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
          • MD5 SHA1 SHA512 SSDEEP

          57C8EDB95DF3F0AD4EE2DC2B8CFD4157

          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157
          • Size 4KB
          • SHA256 77a3cfe6b7eb676af438d5de88c7efcb6abcc494e0b65da90201969e6d79b2a3
          • MD5 SHA1 SHA512 SSDEEP

          E1VTKTTS.cookie

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cookies\E1VTKTTS.cookie
          • Size 132B
          • SHA256 941b274c749ef56ffe35354d17e5946e36c4dfe81a53c870e33034913140d0c4
          • MD5 SHA1 SHA512

          Y0WISECR.cookie

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cookies\Y0WISECR.cookie
          • Size 132B
          • SHA256 0b04b502cff7f6b51316970497a17b68d6358e738c6bd924b6a05b8eddcbc91d
          • MD5 SHA1 SHA512

          24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
          • Size 1KB
          • SHA256 6e5c17b2b4e22fa800baa0eaf0b76ce73005e463b915503e8bca92223b9cf594
          • MD5 SHA1 SHA512

          57C8EDB95DF3F0AD4EE2DC2B8CFD4157

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157
          • Size 4KB
          • SHA256 77a3cfe6b7eb676af438d5de88c7efcb6abcc494e0b65da90201969e6d79b2a3
          • MD5 SHA1 SHA512 SSDEEP

          CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA
          • Size 724B
          • SHA256 0b720e19270c672f9b6e0ec40b468ac49376807de08a814573fe038779534f45
          • MD5 SHA1 SHA512

          F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190
          • Size 471B
          • SHA256 f7ffcd2b2deb0aafb5ab3eca136e1bfa6560686bf31f6982afeb0535dfd70bd7
          • MD5 SHA1 SHA512

          24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
          • Size 410B
          • SHA256 255aa56a997fd9f1e126a718697b06ae318d3528393d54d0ecbeaa3f26a5c435
          • MD5 SHA1 SHA512

          57C8EDB95DF3F0AD4EE2DC2B8CFD4157

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157
          • Size 342B
          • SHA256 84abc786c4287c80754e38ba84dc476508189cd82f24497db8835e9b7d3488b3
          • MD5 SHA1 SHA512

          CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA
          • Size 392B
          • SHA256 ff5ccde7dd97ea3a581617debf5ac8cedd6c206aae50fd7703884eea55f9c22b
          • MD5 SHA1 SHA512

          F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

          • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190
          • Size 406B
          • SHA256 675be7d91eb4f03cc582fc2256b1532684b3ca22b04d0afa6d3272711faec6a4
          • MD5 SHA1 SHA512

          B0FC.bat

          • Path C:\Users\Admin\AppData\Local\Temp\B0FC.bat
          • Size 79B
          • SHA256 ef6e942aefe925fefac19fa816986ea25de6935c4f377c717e29b94e65f9019f
          • MD5 SHA1 SHA512

          memory/2496-0-0x0000000000400000-0x0000000000409000-memory.dmp

          memory/2496-5-0x0000000000400000-0x0000000000409000-memory.dmp

          memory/2496-3-0x0000000000400000-0x0000000000409000-memory.dmp

          memory/3164-4-0x00000000012D0000-0x00000000012E6000-memory.dmp

          memory/3640-206-0x0000023CA1040000-0x0000023CA1060000-memory.dmp

          memory/3640-357-0x0000023CA2D30000-0x0000023CA2D32000-memory.dmp

          memory/3640-320-0x0000023CA0CE0000-0x0000023CA0CE2000-memory.dmp

          memory/3640-324-0x0000023CA0DC0000-0x0000023CA0DC2000-memory.dmp

          memory/3640-378-0x0000023CA2A00000-0x0000023CA2A02000-memory.dmp

          memory/3640-370-0x0000023CA29E0000-0x0000023CA29E2000-memory.dmp

          memory/3640-359-0x0000023CA2D40000-0x0000023CA2D42000-memory.dmp

          memory/3640-382-0x0000023CA2AB0000-0x0000023CA2AB2000-memory.dmp

          memory/3640-387-0x0000023CA1900000-0x0000023CA1A00000-memory.dmp

          memory/3640-393-0x0000023CA0980000-0x0000023CA09A0000-memory.dmp

          memory/3640-397-0x0000023C8FE00000-0x0000023C8FF00000-memory.dmp

          memory/3640-368-0x0000023CA29C0000-0x0000023CA29C2000-memory.dmp

          memory/3640-355-0x0000023CA2D20000-0x0000023CA2D22000-memory.dmp

          memory/3640-352-0x0000023CA1EE0000-0x0000023CA1EE2000-memory.dmp

          memory/3640-349-0x0000023CA16E0000-0x0000023CA16E2000-memory.dmp

          memory/3640-340-0x0000023CA0DD0000-0x0000023CA0DD2000-memory.dmp

          memory/4068-440-0x00000223D9A20000-0x00000223D9A40000-memory.dmp

          memory/4864-372-0x00000282525B0000-0x00000282525B1000-memory.dmp

          memory/4864-374-0x00000282525C0000-0x00000282525C1000-memory.dmp

          memory/4864-51-0x0000028251470000-0x0000028251472000-memory.dmp

          memory/4864-32-0x000002824BEE0000-0x000002824BEF0000-memory.dmp

          memory/4864-16-0x000002824BC20000-0x000002824BC30000-memory.dmp

          memory/4992-450-0x00000249173F0000-0x00000249173F2000-memory.dmp