Analysis

  • max time kernel
    300s
  • max time network
    298s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25/09/2023, 01:37

General

  • Target

    41b87ee8d924234ce4626e5411ed60dd4739bb30320c1d7e75f142ab2ce171d6.exe

  • Size

    270KB

  • MD5

    8a57d6596272d8a8cb04c5769dbd08e3

  • SHA1

    ec2333c45f999b3d92fe059ce962a42e322a72df

  • SHA256

    41b87ee8d924234ce4626e5411ed60dd4739bb30320c1d7e75f142ab2ce171d6

  • SHA512

    5506a5479c2c8789a00e0c1687085d2ac09b9201ebdac8aa0a63d6a65ddacb1163e552fccf10860c8b6a4366a9de4bf0e9061a2059913192914aae620839864b

  • SSDEEP

    6144:rRChrJ+j+5j68KsT6h/OCy5U9uAOmASiyBDFqw6:rRsN+j+5+RsqGGu1Okw6

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.

  • Executes dropped EXE 1 IoCs
  • 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 48 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 30 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\41b87ee8d924234ce4626e5411ed60dd4739bb30320c1d7e75f142ab2ce171d6.exe
    "C:\Users\Admin\AppData\Local\Temp\41b87ee8d924234ce4626e5411ed60dd4739bb30320c1d7e75f142ab2ce171d6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
        PID:3196
      • 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:3040
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4640 -s 228
        2⤵
        • Program crash
        PID:4100
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\A498.bat" "
      1⤵
      • Checks computer location settings
      PID:1788
    • 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:3624
    • C:\Windows\system32\browser_broker.exe
      C:\Windows\system32\browser_broker.exe -Embedding
      1⤵
      • Modifies Internet Explorer settings
      PID:4288
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:596
    • 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:824
    • 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:4336
    • 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:4308
    • 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:768
    • 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:4760
    • 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:4128
    • 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:2332
    • C:\Users\Admin\AppData\Roaming\bjhthhw
      C:\Users\Admin\AppData\Roaming\bjhthhw
      1⤵
      • Executes dropped EXE
      PID:4952

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\PZQ0K35H\edgecompatviewlist[1].xml

            Filesize

            74KB

            MD5

            d4fc49dc14f63895d997fa4940f24378

            SHA1

            3efb1437a7c5e46034147cbbc8db017c69d02c31

            SHA256

            853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1

            SHA512

            cc60d79b4afe5007634ac21dc4bc92081880be4c0d798a1735b63b27e936c02f399964f744dc73711987f01e8a1064b02a4867dd6cac27538e5fbe275cc61e0a

          • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\0TMCM6O9\suggestions[1].en-US

            Filesize

            17KB

            MD5

            5a34cb996293fde2cb7a4ac89587393a

            SHA1

            3c96c993500690d1a77873cd62bc639b3a10653f

            SHA256

            c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

            SHA512

            e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

          • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\4VVBONCU\B8BxsscfVBr[1].ico

            Filesize

            1KB

            MD5

            e508eca3eafcc1fc2d7f19bafb29e06b

            SHA1

            a62fc3c2a027870d99aedc241e7d5babba9a891f

            SHA256

            e6d1d77403cd9f14fd2377d07e84350cfe768e3353e402bf42ebdc8593a58c9a

            SHA512

            49e3f31fd73e52ba274db9c7d306cc188e09c3ae683827f420fbb17534d197a503460e7ec2f1af46065f8d0b33f37400659bfa2ae165e502f97a8150e184a38c

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cookies\8VNBU0CR.cookie

            Filesize

            132B

            MD5

            197227d4dc444c9e2bd4012ad0815b95

            SHA1

            41e409a21925ccdb283a682e18f51f6c21c9ecc2

            SHA256

            0a73d2cf61c0c29c71c6f58e8f0af2936f0cad3d4db859889ce1674fd1db7c17

            SHA512

            30342c30c79a28c856436aae6d4b3da86e86584d9f54c899b04a05bf580c81d28988c92289d75435844ebbf67cd276c633258ae6f08d284fa1056840840f009b

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

            Filesize

            1KB

            MD5

            b5eda74305a01c41450e0d12777199e1

            SHA1

            36162e9e8c3a69b237d317f7c300f11927a37c12

            SHA256

            6e5c17b2b4e22fa800baa0eaf0b76ce73005e463b915503e8bca92223b9cf594

            SHA512

            f96b2ea451f4ceef082e1289a7f1e160580f5a8d515eaf2b4df0d8d818c34355c17538806f873fba07118b5c937d8c3172721ee03e3d16126e07c0db5faf16f3

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157

            Filesize

            4KB

            MD5

            24be8a92460b5b7a555b1da559296958

            SHA1

            94147054e8a04e82fea1c185af30c7c90b194064

            SHA256

            77a3cfe6b7eb676af438d5de88c7efcb6abcc494e0b65da90201969e6d79b2a3

            SHA512

            ed8ef0453e050392c430fdcf556249f679570c130decd18057e077471a45ab0bc0fba513cb2d4d1c61f3d1935318113b3733dec2bc7828a169b18a1081e609a0

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

            Filesize

            724B

            MD5

            ac89a852c2aaa3d389b2d2dd312ad367

            SHA1

            8f421dd6493c61dbda6b839e2debb7b50a20c930

            SHA256

            0b720e19270c672f9b6e0ec40b468ac49376807de08a814573fe038779534f45

            SHA512

            c6a88f33688cc0c287f04005e07d5b5e4a8721d204aa429f93ade2a56aeb86e05d89a8f7a44c1e93359a185a4c5f418240c6cdbc5a21314226681c744cf37f36

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

            Filesize

            471B

            MD5

            3b7403306365b481a905b872a4a8fe8d

            SHA1

            848d8b54a1b0fa0f473fe13bbabcb7872c0a6067

            SHA256

            f7ffcd2b2deb0aafb5ab3eca136e1bfa6560686bf31f6982afeb0535dfd70bd7

            SHA512

            bb40f31f256d4635c9ef00ef2eb7f6d959a262e55e8028d2d009073b74979900672073db15b2e3130b551dfe3b770863251940fa13c49375b8e18c5be24fb2a9

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

            Filesize

            410B

            MD5

            e24e9c7c7cd09dfe0d82b07e96a086b2

            SHA1

            c785f2459ca9cae8bc99cdec7ad12f31ccff5cf9

            SHA256

            c85f1b1f188fc810f2979e0cc7e90eeb945f95bc52ffed19851c1baedea42489

            SHA512

            1efd65133de6d794426d20f529b5b8119a0a3adcd83b1dfb554ef0b0f75e8b802612f77db5aa56276e79a620ec5063e8591c4c720ac5d728ecce1a1ba432ff4f

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157

            Filesize

            342B

            MD5

            71ef8c3c6fbbf9769ef209b2dc7b7288

            SHA1

            c837d08fc81f157124e58c81a7bc15a9dcb8b335

            SHA256

            9fd31dbb66ea36349814bac12efcd6882c38679994106472be21cb5dd0746295

            SHA512

            0f513d1ea897c64fc064d63e6493589bb66538cc1cafbf9636c34fea5fb9946b74366fd229c0a4b95ea5cff95855fa0f6ce31f575700518e8684b04cebbae6e0

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

            Filesize

            392B

            MD5

            57fcfd6f91de69c05f1e8456816d7ff0

            SHA1

            3b2a8ac1dd3ec9ac71459c8f32b76e94707fee31

            SHA256

            d5a452768671fc8b6c29636c7ca732dd408d29491c8f66e3eeb7bbbd5b904e79

            SHA512

            93a42d80b5ee8d83fec8a4d5ad9fc4a86c55eb1e64edbf22d6343d7ef5a4eaefc58d7c12f4c8aec8e3947b48ae5b8dd71c7deeff2bab3481edbd16162edf2a2a

          • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

            Filesize

            406B

            MD5

            f479e0e37aaccb2ccbdab681cdc91a84

            SHA1

            80090c84f5a392289a6b869e9728948c69d2cbd7

            SHA256

            7baf39ed7f077503e4626285db8c2a1e6b4812c54a378522f5fd1e069ea4d009

            SHA512

            b404d7449c296170232ff2a0d4123fc0013d84a105294682fddbd59a8144fff67bce93900d16c4fde6af4eb11838476f840d169c45a27501ee2d7bd52d5402cb

          • C:\Users\Admin\AppData\Local\Temp\A498.bat

            Filesize

            79B

            MD5

            403991c4d18ac84521ba17f264fa79f2

            SHA1

            850cc068de0963854b0fe8f485d951072474fd45

            SHA256

            ef6e942aefe925fefac19fa816986ea25de6935c4f377c717e29b94e65f9019f

            SHA512

            a20aaa77065d30195e5893f2ff989979383c8d7f82d9e528d4833b1c1236aef4f85284f5250d0f190a174790b650280ffe1fbff7e00c98024ccf5ca746e5b576

          • C:\Users\Admin\AppData\Roaming\bjhthhw

            Filesize

            96KB

            MD5

            7825cad99621dd288da81d8d8ae13cf5

            SHA1

            f3e1ab0c8e4f22e718cdeb6fa5faa87b0e61e73c

            SHA256

            529088553fe9cb3e497ef704ce9bc7bc07630f6ddfad44afb92acfe639789ec5

            SHA512

            2e81251a2c140a96f681fa95d82eee531b391e2654daa90da08d1dd00f13cba949136d465a2dc37507d40b4a708b6fc695baa716f19737591b1a89bd2a4b60b4

          • C:\Users\Admin\AppData\Roaming\bjhthhw

            Filesize

            96KB

            MD5

            7825cad99621dd288da81d8d8ae13cf5

            SHA1

            f3e1ab0c8e4f22e718cdeb6fa5faa87b0e61e73c

            SHA256

            529088553fe9cb3e497ef704ce9bc7bc07630f6ddfad44afb92acfe639789ec5

            SHA512

            2e81251a2c140a96f681fa95d82eee531b391e2654daa90da08d1dd00f13cba949136d465a2dc37507d40b4a708b6fc695baa716f19737591b1a89bd2a4b60b4

          • memory/3040-3-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/3040-5-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/3040-0-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/3264-4-0x00000000012E0000-0x00000000012F6000-memory.dmp

            Filesize

            88KB

          • memory/3624-51-0x00000212D29F0000-0x00000212D29F2000-memory.dmp

            Filesize

            8KB

          • memory/3624-32-0x00000212D1DE0000-0x00000212D1DF0000-memory.dmp

            Filesize

            64KB

          • memory/3624-371-0x00000212D81D0000-0x00000212D81D1000-memory.dmp

            Filesize

            4KB

          • memory/3624-16-0x00000212D1B20000-0x00000212D1B30000-memory.dmp

            Filesize

            64KB

          • memory/3624-372-0x00000212D86B0000-0x00000212D86B1000-memory.dmp

            Filesize

            4KB

          • memory/4308-92-0x000001F36CC00000-0x000001F36CC20000-memory.dmp

            Filesize

            128KB

          • memory/4336-227-0x000001F97A3B0000-0x000001F97A3D0000-memory.dmp

            Filesize

            128KB

          • memory/4336-248-0x000001F978810000-0x000001F978812000-memory.dmp

            Filesize

            8KB

          • memory/4336-368-0x000001F97C5E0000-0x000001F97C5E2000-memory.dmp

            Filesize

            8KB

          • memory/4336-395-0x000001F97CD30000-0x000001F97CD32000-memory.dmp

            Filesize

            8KB

          • memory/4336-403-0x000001F979E90000-0x000001F979E92000-memory.dmp

            Filesize

            8KB

          • memory/4336-406-0x000001F97BCC0000-0x000001F97BDC0000-memory.dmp

            Filesize

            1024KB

          • memory/4336-409-0x000001F97D400000-0x000001F97D500000-memory.dmp

            Filesize

            1024KB

          • memory/4336-433-0x000001F97AB00000-0x000001F97AC00000-memory.dmp

            Filesize

            1024KB

          • memory/4336-357-0x000001F97A160000-0x000001F97A162000-memory.dmp

            Filesize

            8KB

          • memory/4336-375-0x000001F97CAF0000-0x000001F97CAF2000-memory.dmp

            Filesize

            8KB

          • memory/4336-238-0x000001F9788C0000-0x000001F9788C2000-memory.dmp

            Filesize

            8KB

          • memory/4336-232-0x000001F9788A0000-0x000001F9788A2000-memory.dmp

            Filesize

            8KB

          • memory/4336-229-0x000001F97A150000-0x000001F97A152000-memory.dmp

            Filesize

            8KB

          • memory/4336-211-0x000001F979100000-0x000001F979200000-memory.dmp

            Filesize

            1024KB

          • memory/4336-142-0x000001F979840000-0x000001F979842000-memory.dmp

            Filesize

            8KB

          • memory/4336-212-0x000001F97A0E0000-0x000001F97A0E2000-memory.dmp

            Filesize

            8KB

          • memory/4336-151-0x000001F979F60000-0x000001F979F62000-memory.dmp

            Filesize

            8KB

          • memory/4336-146-0x000001F9799E0000-0x000001F9799E2000-memory.dmp

            Filesize

            8KB

          • memory/4760-472-0x0000021B3D100000-0x0000021B3D200000-memory.dmp

            Filesize

            1024KB