Windows 7 deprecation

Windows 7 will be removed from tria.ge on 2025-03-31

Analysis

  • max time kernel
    126s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04/05/2024, 19:11

General

  • Target

    fwanufwa.exe

  • Size

    16.7MB

  • MD5

    157d1a68e8368cb8ed46e3173122562b

  • SHA1

    9fda498d3101ab26afe01a630f7dfec445cbef0c

  • SHA256

    aa1beca1ce33a11a5c56a8a79d03e38b51339d0fe977495ad72eb8b068b379bc

  • SHA512

    94ccf7674c0f5f849cd28c04da7d4dd045107fe78ca98e62f622511c3953ef94b6f248703820b29d01713d062984b300b37d5ba1c7d2e5b15febeddcb603a83d

  • SSDEEP

    393216:Aw73+t5XTNsNiI7T+PkdymUAZDtGACaeIXHZzvhh0fLD4DbTpcF13X:AQ3+t7I7TXCaeaZzv7GDAcF13

Malware Config

Extracted

Family

xworm

C2

94.13.152.8:25565

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 4 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 7 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Sets DLL path for service in the registry 2 TTPs 1 IoCs
  • Stops running service(s) 4 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 4 IoCs
  • Themida packer 8 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 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\fwanufwa.exe
    "C:\Users\Admin\AppData\Local\Temp\fwanufwa.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\ProgramData\5Bzkgs9t.exe
      "C:\ProgramData\5Bzkgs9t.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2120
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command Remove-Item 'C:\ProgramData\5Bzkgs9t.exe.bak' -force
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2840
      • C:\Windows\system32\net.exe
        net stop w32time
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2472
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 stop w32time
          4⤵
            PID:2496
        • C:\Windows\system32\w32tm.exe
          w32tm /unregister
          3⤵
            PID:2212
          • C:\Windows\system32\w32tm.exe
            w32tm /register
            3⤵
            • Sets DLL path for service in the registry
            PID:2520
          • C:\Windows\system32\net.exe
            net start w32time
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2984
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 start w32time
              4⤵
                PID:2688
            • C:\Windows\system32\w32tm.exe
              w32tm /resync /force
              3⤵
                PID:2744
              • C:\Windows\system32\net.exe
                net stop w32time
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:2412
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 stop w32time
                  4⤵
                    PID:380
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell (GWMI Win32_Processor).VirtualizationFirmwareEnabled
                  3⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1660
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -command "confirm-securebootuefi"
                  3⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1820
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -command "$env:firmware_type"
                  3⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1340
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 2120 -s 888
                  3⤵
                  • Loads dropped DLL
                  PID:3016
                • C:\Windows\system32\fsutil.exe
                  fsutil behavior set disablelastaccess 1
                  3⤵
                    PID:2152
                  • C:\Windows\system32\sc.exe
                    sc stop "PcaSvc"
                    3⤵
                    • Launches sc.exe
                    PID:2680
                • C:\ProgramData\XClient.exe
                  "C:\ProgramData\XClient.exe"
                  2⤵
                  • Drops startup file
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:2768
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\XClient.exe'
                    3⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1136
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
                    3⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1560
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
                    3⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1084
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
                    3⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2324
                  • C:\Windows\System32\schtasks.exe
                    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
                    3⤵
                    • Creates scheduled task(s)
                    PID:2076
              • C:\Windows\system32\taskeng.exe
                taskeng.exe {6BF5529C-703E-46DB-9AF8-64F207853626} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
                1⤵
                • Suspicious use of WriteProcessMemory
                PID:1804
                • C:\Users\Admin\AppData\Roaming\XClient.exe
                  C:\Users\Admin\AppData\Roaming\XClient.exe
                  2⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1732
                • C:\Users\Admin\AppData\Roaming\XClient.exe
                  C:\Users\Admin\AppData\Roaming\XClient.exe
                  2⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1736

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\ProgramData\XClient.exe

                Filesize

                59KB

                MD5

                373a87e2d6e4f2d5b6b530bece8ceb67

                SHA1

                17b5e6fdc6a6a797e5833ccb8c0d8aebae96d60f

                SHA256

                1d6dd855bb196a7b983bd151fda3c0a302ebad418395b737cdf300de40c08a31

                SHA512

                0d99eb06b36a73124ccffe9e5251dbba71b905c5eb3b2d38492512d4b6327845017eb0cdc30273d917556f701cd37f26385936bee4feaa0982b89fa4541ad5c0

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

                Filesize

                7KB

                MD5

                92a0b694e858eaf5304d6f48ff855ed0

                SHA1

                97abadd7313d9bf989ef902c9985329c3812a383

                SHA256

                242bb7ed7f8e3effb563fb53ec0cd34e8021b1e573960173968a0bd855a1042f

                SHA512

                214374c56c1aa6230fa58375bbc37315e31fa44691421b06d3dc58c95ea8e2ae4455c2058b227e323bdcfd7ba4e65441290d431db13d47d2bfcf1d80422077bb

              • \ProgramData\5Bzkgs9t.exe

                Filesize

                16.6MB

                MD5

                2168b2eff6aa08948aa8bec7304a3358

                SHA1

                b19f9edd3fa9a53a687120f778ce6b9bfd6c0ac1

                SHA256

                cbc18abc563c1fe2d1a71c7bc2350807c62ecffdb02b11f1a34946b0777bd677

                SHA512

                76f1963825df8b9cc7427127357216ce27a0e61f4b8500f7b2f6e65093fd98e7cdd7289a6867f223e23f2cedd10ae52ba72ccb21075c2eee70efeaca50f4f04b

              • memory/1136-70-0x0000000000460000-0x0000000000468000-memory.dmp

                Filesize

                32KB

              • memory/1136-69-0x000000001B7F0000-0x000000001BAD2000-memory.dmp

                Filesize

                2.9MB

              • memory/1660-50-0x000000001B4B0000-0x000000001B792000-memory.dmp

                Filesize

                2.9MB

              • memory/1660-55-0x0000000002240000-0x0000000002248000-memory.dmp

                Filesize

                32KB

              • memory/1732-97-0x0000000000180000-0x0000000000196000-memory.dmp

                Filesize

                88KB

              • memory/1736-104-0x0000000000040000-0x0000000000056000-memory.dmp

                Filesize

                88KB

              • memory/2120-14-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-16-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-102-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-37-0x000007FFFFF90000-0x000007FFFFFA0000-memory.dmp

                Filesize

                64KB

              • memory/2120-19-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-18-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-17-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2120-91-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2768-12-0x00000000000F0000-0x0000000000106000-memory.dmp

                Filesize

                88KB

              • memory/2840-24-0x000000001B790000-0x000000001BA72000-memory.dmp

                Filesize

                2.9MB

              • memory/2840-25-0x0000000001D10000-0x0000000001D18000-memory.dmp

                Filesize

                32KB

              • memory/2944-0-0x000007FEF54B3000-0x000007FEF54B4000-memory.dmp

                Filesize

                4KB

              • memory/2944-13-0x0000000140000000-0x00000001428C5000-memory.dmp

                Filesize

                40.8MB

              • memory/2944-1-0x0000000000870000-0x000000000192C000-memory.dmp

                Filesize

                16.7MB