Analysis

  • max time kernel
    161s
  • max time network
    158s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    24/01/2022, 07:01

General

  • Target
    05f70f02dc8c7054afd3ff2b7b730921.exe
  • Size 251KB
  • Sample220124-hs782aded4
  • SHA256 fc0ca51fbc6a446ee39b3cdfc49a571c75ba7398ebb3b1a212882608061bb1e4
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://abpa.at/upload/

  • http://emaratghajari.com/upload/

  • http://d7qw.cn/upload/

  • http://alumik-group.ru/upload/

  • http://zamkikurgan.ru/upload/

  • https://oakland-studio.video/search.php

  • https://seattle-university.video/search.php

rc4.i32
rc4.i32
rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Deletes itself 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

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

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Gathers network information 2 TTPs 4 IoCs

    Uses commandline utility to view network configuration.

  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • Modifies Internet Explorer settings 1 TTPs 14 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 48 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
    "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
    1⤵
      PID:3276
    • c:\windows\system32\taskhostw.exe
      taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
      1⤵
        PID:2764
      • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
        1⤵
          PID:3292
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3504
          • C:\Windows\system32\DllHost.exe
            C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
            1⤵
              PID:3780
              • C:\Windows\system32\WerFault.exe
                C:\Windows\system32\WerFault.exe -u -p 3780 -s 900
                2⤵
                • Program crash
                PID:1372
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc
              1⤵
                PID:2496
              • c:\windows\system32\sihost.exe
                sihost.exe
                1⤵
                  PID:2416
                • C:\Users\Admin\AppData\Local\Temp\05f70f02dc8c7054afd3ff2b7b730921.exe
                  "C:\Users\Admin\AppData\Local\Temp\05f70f02dc8c7054afd3ff2b7b730921.exe"
                  1⤵
                  • Checks SCSI registry key(s)
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious behavior: MapViewOfSection
                  PID:3792
                • C:\Users\Admin\AppData\Local\Temp\850A.exe
                  C:\Users\Admin\AppData\Local\Temp\850A.exe
                  1⤵
                  • Executes dropped EXE
                  • Checks SCSI registry key(s)
                  • Suspicious behavior: MapViewOfSection
                  PID:3468
                • C:\Windows\system32\cmd.exe
                  cmd
                  1⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3692
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get displayName /format:csv
                    2⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:856
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /namespace:\\root\SecurityCenter2 Path FirewallProduct Get displayName /format:csv
                    2⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:980
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /namespace:\\root\SecurityCenter2 Path AntiSpywareProduct Get displayName /format:csv
                    2⤵
                      PID:3416
                    • C:\Windows\System32\Wbem\WMIC.exe
                      wmic /namespace:\\root\cimv2 Path Win32_Processor Get Name,DeviceID,NumberOfCores /format:csv
                      2⤵
                        PID:1372
                      • C:\Windows\System32\Wbem\WMIC.exe
                        wmic /namespace:\\root\cimv2 Path Win32_Product Get Name,Version /format:csv
                        2⤵
                          PID:1476
                        • C:\Windows\System32\Wbem\WMIC.exe
                          wmic /namespace:\\root\cimv2 Path Win32_NetworkAdapter Where PhysicalAdapter=TRUE Get Name,MACAddress,ProductName,ServiceName,NetConnectionID /format:csv
                          2⤵
                            PID:3556
                          • C:\Windows\System32\Wbem\WMIC.exe
                            wmic /namespace:\\root\cimv2 Path Win32_StartupCommand Get Name,Location,Command /format:csv
                            2⤵
                              PID:2728
                            • C:\Windows\System32\Wbem\WMIC.exe
                              wmic /namespace:\\root\cimv2 Path Win32_OperatingSystem Get Caption,CSDVersion,BuildNumber,Version,BuildType,CountryCode,CurrentTimeZone,InstallDate,LastBootUpTime,Locale,OSArchitecture,OSLanguage,OSProductSuite,OSType,SystemDirectory,Organization,RegisteredUser,SerialNumber /format:csv
                              2⤵
                                PID:3636
                              • C:\Windows\System32\Wbem\WMIC.exe
                                wmic /namespace:\\root\cimv2 Path Win32_Process Get Caption,CommandLine,ExecutablePath,ProcessId /format:csv
                                2⤵
                                  PID:3608
                                • C:\Windows\System32\Wbem\WMIC.exe
                                  wmic /namespace:\\root\cimv2 Path Win32_Volume Get Name,Label,FileSystem,SerialNumber,BootVolume,Capacity,DriveType /format:csv
                                  2⤵
                                    PID:3632
                                  • C:\Windows\System32\Wbem\WMIC.exe
                                    wmic /namespace:\\root\cimv2 Path Win32_UserAccount Get Name,Domain,AccountType,LocalAccount,Disabled,Status,SID /format:csv
                                    2⤵
                                      PID:1808
                                    • C:\Windows\System32\Wbem\WMIC.exe
                                      wmic /namespace:\\root\cimv2 Path Win32_GroupUser Get GroupComponent,PartComponent /format:csv
                                      2⤵
                                        PID:3852
                                      • C:\Windows\System32\Wbem\WMIC.exe
                                        wmic /namespace:\\root\cimv2 Path Win32_ComputerSystem Get Caption,Manufacturer,PrimaryOwnerName,UserName,Workgroup /format:csv
                                        2⤵
                                          PID:2644
                                        • C:\Windows\System32\Wbem\WMIC.exe
                                          wmic /namespace:\\root\cimv2 Path Win32_PnPEntity Where ClassGuid="{50dd5230-ba8a-11d1-bf5d-0000f805f530}" Get Name,DeviceID,PNPDeviceID,Manufacturer,Description /format:csv
                                          2⤵
                                            PID:2972
                                          • C:\Windows\system32\ipconfig.exe
                                            ipconfig /displaydns
                                            2⤵
                                            • Gathers network information
                                            PID:1176
                                          • C:\Windows\system32\ROUTE.EXE
                                            route print
                                            2⤵
                                              PID:3944
                                            • C:\Windows\system32\netsh.exe
                                              netsh firewall show state
                                              2⤵
                                                PID:616
                                              • C:\Windows\system32\systeminfo.exe
                                                systeminfo
                                                2⤵
                                                • Gathers system information
                                                PID:2744
                                              • C:\Windows\system32\tasklist.exe
                                                tasklist /v
                                                2⤵
                                                • Enumerates processes with tasklist
                                                PID:2676
                                              • C:\Windows\system32\net.exe
                                                net accounts /domain
                                                2⤵
                                                • Suspicious use of WriteProcessMemory
                                                PID:2688
                                                • C:\Windows\system32\net1.exe
                                                  C:\Windows\system32\net1 accounts /domain
                                                  3⤵
                                                    PID:528
                                                • C:\Windows\system32\net.exe
                                                  net share
                                                  2⤵
                                                  • Suspicious use of WriteProcessMemory
                                                  PID:1268
                                                  • C:\Windows\system32\net1.exe
                                                    C:\Windows\system32\net1 share
                                                    3⤵
                                                      PID:936
                                                  • C:\Windows\system32\net.exe
                                                    net user
                                                    2⤵
                                                    • Suspicious use of WriteProcessMemory
                                                    PID:3000
                                                    • C:\Windows\system32\net1.exe
                                                      C:\Windows\system32\net1 user
                                                      3⤵
                                                        PID:2408
                                                    • C:\Windows\system32\net.exe
                                                      net user /domain
                                                      2⤵
                                                      • Suspicious use of WriteProcessMemory
                                                      PID:424
                                                      • C:\Windows\system32\net1.exe
                                                        C:\Windows\system32\net1 user /domain
                                                        3⤵
                                                          PID:1308
                                                      • C:\Windows\system32\net.exe
                                                        net use
                                                        2⤵
                                                          PID:3312
                                                        • C:\Windows\system32\net.exe
                                                          net group
                                                          2⤵
                                                          • Suspicious use of WriteProcessMemory
                                                          PID:2772
                                                          • C:\Windows\system32\net1.exe
                                                            C:\Windows\system32\net1 group
                                                            3⤵
                                                              PID:1404
                                                          • C:\Windows\system32\net.exe
                                                            net localgroup
                                                            2⤵
                                                              PID:3984
                                                              • C:\Windows\system32\net1.exe
                                                                C:\Windows\system32\net1 localgroup
                                                                3⤵
                                                                  PID:1812
                                                              • C:\Windows\system32\NETSTAT.EXE
                                                                netstat -r
                                                                2⤵
                                                                • Gathers network information
                                                                PID:2548
                                                                • C:\Windows\system32\cmd.exe
                                                                  C:\Windows\system32\cmd.exe /c "C:\Windows\system32\route.exe" print
                                                                  3⤵
                                                                    PID:2592
                                                                    • C:\Windows\system32\ROUTE.EXE
                                                                      C:\Windows\system32\route.exe print
                                                                      4⤵
                                                                        PID:3796
                                                                  • C:\Windows\system32\NETSTAT.EXE
                                                                    netstat -nao
                                                                    2⤵
                                                                    • Gathers network information
                                                                    PID:2856
                                                                  • C:\Windows\system32\schtasks.exe
                                                                    schtasks /query
                                                                    2⤵
                                                                      PID:3576
                                                                    • C:\Windows\system32\ipconfig.exe
                                                                      ipconfig /all
                                                                      2⤵
                                                                      • Gathers network information
                                                                      PID:3212
                                                                  • C:\Windows\system32\msiexec.exe
                                                                    C:\Windows\system32\msiexec.exe /V
                                                                    1⤵
                                                                      PID:1824
                                                                    • C:\Program Files\Internet Explorer\iexplore.exe
                                                                      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
                                                                      1⤵
                                                                      • Modifies Internet Explorer settings
                                                                      • Suspicious use of FindShellTrayWindow
                                                                      • Suspicious use of SetWindowsHookEx
                                                                      PID:2156
                                                                      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                                                                        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2156 CREDAT:82945 /prefetch:2
                                                                        2⤵
                                                                        • Modifies Internet Explorer settings
                                                                        • Suspicious use of SetWindowsHookEx
                                                                        PID:2360
                                                                    • C:\Windows\SysWOW64\explorer.exe
                                                                      C:\Windows\SysWOW64\explorer.exe
                                                                      1⤵
                                                                      • Accesses Microsoft Outlook profiles
                                                                      • outlook_office_path
                                                                      • outlook_win_path
                                                                      PID:3844
                                                                    • C:\Windows\explorer.exe
                                                                      C:\Windows\explorer.exe
                                                                      1⤵
                                                                        PID:2396
                                                                      • C:\Windows\SysWOW64\explorer.exe
                                                                        C:\Windows\SysWOW64\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:3832
                                                                      • C:\Windows\explorer.exe
                                                                        C:\Windows\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:1852
                                                                      • C:\Windows\SysWOW64\explorer.exe
                                                                        C:\Windows\SysWOW64\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:888
                                                                      • C:\Windows\explorer.exe
                                                                        C:\Windows\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:3060
                                                                      • C:\Windows\SysWOW64\explorer.exe
                                                                        C:\Windows\SysWOW64\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:1952
                                                                      • C:\Windows\explorer.exe
                                                                        C:\Windows\explorer.exe
                                                                        1⤵
                                                                        • Suspicious behavior: MapViewOfSection
                                                                        PID:3696

                                                                      Network

                                                                            MITRE ATT&CK Enterprise v6

                                                                            Replay Monitor

                                                                            Loading Replay Monitor...

                                                                            Downloads

                                                                            memory/888-145-0x0000000000650000-0x0000000000659000-memory.dmp

                                                                            memory/888-144-0x0000000000660000-0x0000000000665000-memory.dmp

                                                                            memory/1372-157-0x0000028EF82B0000-0x0000028EF82B1000-memory.dmp

                                                                            memory/1852-143-0x0000000000BD0000-0x0000000000BDE000-memory.dmp

                                                                            memory/1852-142-0x0000000000BE0000-0x0000000000BE9000-memory.dmp

                                                                            memory/1952-148-0x0000000000820000-0x0000000000826000-memory.dmp

                                                                            memory/1952-149-0x0000000000810000-0x000000000081B000-memory.dmp

                                                                            memory/2396-139-0x0000000000350000-0x000000000035C000-memory.dmp

                                                                            memory/2416-152-0x000001D820380000-0x000001D820381000-memory.dmp

                                                                            memory/2496-153-0x000001C742380000-0x000001C742381000-memory.dmp

                                                                            memory/2764-154-0x00000292D0C50000-0x00000292D0C51000-memory.dmp

                                                                            memory/2764-156-0x00000292D0F90000-0x00000292D0F91000-memory.dmp

                                                                            memory/3036-127-0x0000000002A90000-0x0000000002AA6000-memory.dmp

                                                                            memory/3036-130-0x0000000002B50000-0x0000000002B5F000-memory.dmp

                                                                            memory/3036-121-0x0000000000A30000-0x0000000000A46000-memory.dmp

                                                                            memory/3060-147-0x0000000000EE0000-0x0000000000EEC000-memory.dmp

                                                                            memory/3060-146-0x0000000000EF0000-0x0000000000EF6000-memory.dmp

                                                                            memory/3468-126-0x0000000000400000-0x0000000000446000-memory.dmp

                                                                            memory/3468-125-0x0000000000870000-0x0000000000879000-memory.dmp

                                                                            memory/3468-124-0x0000000000030000-0x0000000000038000-memory.dmp

                                                                            memory/3504-155-0x000001EAA17A0000-0x000001EAA17A1000-memory.dmp

                                                                            memory/3696-150-0x0000000000CB0000-0x0000000000CB7000-memory.dmp

                                                                            memory/3696-151-0x0000000000CA0000-0x0000000000CAD000-memory.dmp

                                                                            memory/3792-118-0x0000000000030000-0x0000000000038000-memory.dmp

                                                                            memory/3792-120-0x0000000000400000-0x0000000000446000-memory.dmp

                                                                            memory/3792-119-0x0000000000490000-0x0000000000499000-memory.dmp

                                                                            memory/3832-141-0x0000000000A10000-0x0000000000A1B000-memory.dmp

                                                                            memory/3832-140-0x0000000000A20000-0x0000000000A27000-memory.dmp

                                                                            memory/3844-138-0x0000000000600000-0x000000000066B000-memory.dmp

                                                                            memory/3844-137-0x0000000000670000-0x00000000006E5000-memory.dmp