Analysis

  • max time kernel
    123s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/11/2023, 15:24

General

  • Target
    b92f9a4d53ddaa32a6a42d348744cabd.exe
  • Size 289KB
  • Sample231127-ss3zeshd83
  • SHA256 0e1c1f54576e5ea6f024852228ef877537849db15a46633d77e36d8439e9609a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • smokeloader

Botnet
  • up4

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://host-file-file0.com/

  • http://file-file-file1.com/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 39 IoCs

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

  • Modifies registry class 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 30 IoCs
  • Suspicious use of FindShellTrayWindow 16 IoCs
  • Suspicious use of SendNotifyMessage 11 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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\b92f9a4d53ddaa32a6a42d348744cabd.exe
    "C:\Users\Admin\AppData\Local\Temp\b92f9a4d53ddaa32a6a42d348744cabd.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1464
    • C:\Users\Admin\AppData\Local\Temp\b92f9a4d53ddaa32a6a42d348744cabd.exe
      "C:\Users\Admin\AppData\Local\Temp\b92f9a4d53ddaa32a6a42d348744cabd.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:3432
  • C:\Windows\explorer.exe
    explorer.exe
    1⤵
    • Modifies Installed Components in the registry
    • Enumerates connected drives
    • Checks SCSI registry key(s)
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1504
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:1816
  • C:\Windows\explorer.exe
    explorer.exe
    1⤵
      PID:4888
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
        PID:4772
      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
        1⤵
          PID:2804
        • C:\Windows\explorer.exe
          explorer.exe
          1⤵
            PID:1656
          • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
            "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
            1⤵
              PID:4980
            • C:\Windows\explorer.exe
              explorer.exe
              1⤵
                PID:3996
              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                1⤵
                  PID:3692
                • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                  "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                  1⤵
                    PID:4192
                  • C:\Windows\explorer.exe
                    explorer.exe
                    1⤵
                      PID:1756
                    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                      1⤵
                        PID:2424
                      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                        1⤵
                          PID:1000
                        • C:\Windows\explorer.exe
                          explorer.exe
                          1⤵
                            PID:452

                          Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                80237EE4964FC9C409AAF55BF996A292_D46D6FA25B74360E1349F9015B5CCE53

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\80237EE4964FC9C409AAF55BF996A292_D46D6FA25B74360E1349F9015B5CCE53
                                • Size 471B
                                • SHA256 07b7338e63a59d68f7901bb2942a11fcb97eac798efb7008f0c37622a063b70a
                                • MD5 SHA1 SHA512

                                80237EE4964FC9C409AAF55BF996A292_D46D6FA25B74360E1349F9015B5CCE53

                                • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\80237EE4964FC9C409AAF55BF996A292_D46D6FA25B74360E1349F9015B5CCE53
                                • Size 412B
                                • SHA256 0bd342e561eff9ac069a9bd9e980131c3bc14440c60cc75c2c35f4742bd2e8f9
                                • MD5 SHA1 SHA512

                                microsoft.windows[1].xml

                                • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\Z7LOIA6T\microsoft.windows[1].xml
                                • Size 96B
                                • SHA256 bb763557ec01c0968c2c4e8d9414c197e9b1961a697c0fd99b8da3c67133740d
                                • MD5 SHA1 SHA512

                                microsoft.windows[1].xml

                                • Path C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\Z7LOIA6T\microsoft.windows[1].xml
                                • Size 189B
                                • SHA256 511f0f9980833c74dd211a84e0c8bb7e5b0b270d534f442ddb3ce4ca0ea0da02
                                • MD5 SHA1 SHA512

                                microsoft.windows[1].xml

                                • Path C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\Z7LOIA6T\microsoft.windows[1].xml
                                • Size 96B
                                • SHA256 bb763557ec01c0968c2c4e8d9414c197e9b1961a697c0fd99b8da3c67133740d
                                • MD5 SHA1 SHA512

                                memory/1000-77-0x0000022E1E7D0000-0x0000022E1E7F0000-memory.dmp

                                memory/1000-73-0x0000022E1E360000-0x0000022E1E380000-memory.dmp

                                memory/1000-75-0x0000022E1E320000-0x0000022E1E340000-memory.dmp

                                memory/1464-1-0x0000000002AE0000-0x0000000002BE0000-memory.dmp

                                memory/1464-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

                                memory/1756-65-0x0000000004590000-0x0000000004591000-memory.dmp

                                memory/2804-32-0x0000018E47460000-0x0000018E47480000-memory.dmp

                                memory/2804-35-0x0000018E47420000-0x0000018E47440000-memory.dmp

                                memory/2804-39-0x0000018E478C0000-0x0000018E478E0000-memory.dmp

                                memory/3160-6-0x0000000000760000-0x0000000000776000-memory.dmp

                                memory/3160-14-0x0000000000520000-0x0000000000521000-memory.dmp

                                memory/3432-7-0x0000000000400000-0x0000000000409000-memory.dmp

                                memory/3432-5-0x0000000000400000-0x0000000000409000-memory.dmp

                                memory/3432-4-0x0000000000400000-0x0000000000409000-memory.dmp

                                memory/3432-3-0x0000000000400000-0x0000000000409000-memory.dmp

                                memory/3996-45-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

                                memory/4192-53-0x000001768B170000-0x000001768B190000-memory.dmp

                                memory/4192-55-0x000001768B130000-0x000001768B150000-memory.dmp

                                memory/4192-59-0x000001768B540000-0x000001768B560000-memory.dmp

                                memory/4888-25-0x0000000004DA0000-0x0000000004DA1000-memory.dmp