Resubmissions

13-01-2025 01:00

250113-bcnq5axqbt 10

09-01-2025 12:16

250109-pfhwyazjhs 10

06-01-2025 14:21

250106-rpb6vs1kgr 10

02-01-2025 20:47

250102-zlagvsvpdv 10

02-01-2025 20:45

250102-zjvd9ayjar 10

Analysis

  • max time kernel
    148s
  • max time network
    142s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-01-2025 14:21

General

  • Target

    Firefox Installer (ratted).exe

  • Size

    170KB

  • MD5

    200eb10c73336127006740ae06003933

  • SHA1

    32ef06528018d4f9fc8da3a7e7e07363b3a143f4

  • SHA256

    b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0

  • SHA512

    026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce

  • SSDEEP

    1536:4ig4nFL9z2BOwVCMs6se7llqn17KineXd2wVKtivEYoNRh8RX9EIKhI49No:5zFL9zWOw7sgbcUieNJqKoPC5+Lm

Malware Config

Extracted

Family

xworm

Version

5.0

C2

109.231.31.129:2021

Mutex

H7HNKbba3h7eEPOa

Attributes
  • Install_directory

    %AppData%

  • install_file

    FlrefoxUpdate.exe

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Executes dropped EXE 3 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 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\Firefox Installer (ratted).exe
    "C:\Users\Admin\AppData\Local\Temp\Firefox Installer (ratted).exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FlrefoxUpdate" /tr "C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4164
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://google.com/
      2⤵
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4908
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=90.0.4430.212 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=90.0.818.66 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7fffa62c3cb8,0x7fffa62c3cc8,0x7fffa62c3cd8
        3⤵
          PID:3452
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1920 /prefetch:2
          3⤵
            PID:4724
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2232 /prefetch:3
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2628
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2524 /prefetch:8
            3⤵
              PID:4424
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3164 /prefetch:1
              3⤵
                PID:4556
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3192 /prefetch:1
                3⤵
                  PID:1948
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4688 /prefetch:1
                  3⤵
                    PID:4060
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4888 /prefetch:8
                    3⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:5116
                  • C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5784 /prefetch:8
                    3⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:3304
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3708 /prefetch:1
                    3⤵
                      PID:1984
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=1744 /prefetch:1
                      3⤵
                        PID:3536
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4820 /prefetch:1
                        3⤵
                          PID:1652
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1900,10237623154228429343,18433089880606986053,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5460 /prefetch:1
                          3⤵
                            PID:2684
                      • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
                        "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
                        1⤵
                        • Modifies registry class
                        • Suspicious use of SetWindowsHookEx
                        PID:3448
                      • C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                        C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                        1⤵
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        PID:3660
                      • C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                        C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                        1⤵
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        PID:5100
                      • C:\Windows\System32\CompPkgSrv.exe
                        C:\Windows\System32\CompPkgSrv.exe -Embedding
                        1⤵
                          PID:2884
                        • C:\Windows\System32\CompPkgSrv.exe
                          C:\Windows\System32\CompPkgSrv.exe -Embedding
                          1⤵
                            PID:3352
                          • C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                            C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe
                            1⤵
                            • Executes dropped EXE
                            • Suspicious use of AdjustPrivilegeToken
                            PID:660

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

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                          Downloads

                          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\FlrefoxUpdate.exe.log

                            Filesize

                            654B

                            MD5

                            2cbbb74b7da1f720b48ed31085cbd5b8

                            SHA1

                            79caa9a3ea8abe1b9c4326c3633da64a5f724964

                            SHA256

                            e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

                            SHA512

                            ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                            Filesize

                            152B

                            MD5

                            e11c77d0fa99af6b1b282a22dcb1cf4a

                            SHA1

                            2593a41a6a63143d837700d01aa27b1817d17a4d

                            SHA256

                            d96f9bfcc81ba66db49a3385266a631899a919ed802835e6fb6b9f7759476ea0

                            SHA512

                            c8f69f503ab070a758e8e3ae57945c0172ead1894fdbfa2d853e5bb976ed3817ecc8f188eefd5092481effd4ef650788c8ff9a8d9a5ee4526f090952d7c859f3

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                            Filesize

                            152B

                            MD5

                            c0a1774f8079fe496e694f35dfdcf8bc

                            SHA1

                            da3b4b9fca9a3f81b6be5b0cd6dd700603d448d3

                            SHA256

                            c041da0b90a5343ede7364ccf0428852103832c4efa8065a0cd1e8ce1ff181cb

                            SHA512

                            60d9e87f8383fe3afa2c8935f0e5a842624bb24b03b2d8057e0da342b08df18cf70bf55e41fa3ae54f73bc40a274cf6393d79ae01f6a1784273a25fa2761728b

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Cache\f_000003

                            Filesize

                            215KB

                            MD5

                            d79b35ccf8e6af6714eb612714349097

                            SHA1

                            eb3ccc9ed29830df42f3fd129951cb8b791aaf98

                            SHA256

                            c8459799169b81fdab64d028a9ebb058ea2d0ad5feb33a11f6a45a54a5ccc365

                            SHA512

                            f4be1c1e192a700139d7cff5059af81c0234ed5f032796036a1a4879b032ce4eedd16a121bbf776f17bc84a0012846f467ad48b46db4008841c25b779c7d8f5a

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Code Cache\js\index-dir\the-real-index

                            Filesize

                            144B

                            MD5

                            854151955f5c357465c59b4874bda302

                            SHA1

                            d4f4714f1ebad7dc7e79bf0bd0345089e981b573

                            SHA256

                            72e70fb956778b022bd37f48f55315fbf8df99ebc5eb08ffb1344f9ab7ebf09a

                            SHA512

                            671fcd1cd160ded85f8f3d2532573e2ae3c5f647c19f496e29f3dd5f3b7cfb6c158a5ba12e5a35f278ca76602184cefd3f943f2c0431036e18cd79b2b5cc6882

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

                            Filesize

                            111B

                            MD5

                            285252a2f6327d41eab203dc2f402c67

                            SHA1

                            acedb7ba5fbc3ce914a8bf386a6f72ca7baa33c6

                            SHA256

                            5dfc321417fc31359f23320ea68014ebfd793c5bbed55f77dab4180bbd4a2026

                            SHA512

                            11ce7cb484fee66894e63c31db0d6b7ef66ad0327d4e7e2eb85f3bcc2e836a3a522c68d681e84542e471e54f765e091efe1ee4065641b0299b15613eb32dcc0d

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                            Filesize

                            5KB

                            MD5

                            dfaf25286e9a5cafba896b159c195113

                            SHA1

                            bfb882c9d704df5bfc3b56dde23d21c32044bceb

                            SHA256

                            0bed934b90be77dc27d6bc08a9f4fdf28c89eec3325f93a2839fd78a3812bd99

                            SHA512

                            d43b706594e9f6236b81fb845e4221588be7fba3e26339fa14484f8be66e1c49cee5348a51b220a45e25aed3e03756830ae44849c9b0a365481e1a46f32e98a0

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                            Filesize

                            6KB

                            MD5

                            a9836ca62824c7839ad63b2a5099ff8e

                            SHA1

                            f35e2b8d7e48ba7593b9a97b57909358bc95d92f

                            SHA256

                            41a29d9c508d9d1308dcbae00bd85b0c0ab3bb0c4e766a04cee0dc12e75e915f

                            SHA512

                            298b8b5be2aa1812287bddb25da2591e6582d1c4aa510504c068fc80edf645c1afc49e186120875df18354f715cbea49db8e62e78518304c7b0cc86880d69ad0

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                            Filesize

                            16B

                            MD5

                            46295cac801e5d4857d09837238a6394

                            SHA1

                            44e0fa1b517dbf802b18faf0785eeea6ac51594b

                            SHA256

                            0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443

                            SHA512

                            8969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                            Filesize

                            16B

                            MD5

                            206702161f94c5cd39fadd03f4014d98

                            SHA1

                            bd8bfc144fb5326d21bd1531523d9fb50e1b600a

                            SHA256

                            1005a525006f148c86efcbfb36c6eac091b311532448010f70f7de9a68007167

                            SHA512

                            0af09f26941b11991c750d1a2b525c39a8970900e98cba96fd1b55dbf93fee79e18b8aab258f48b4f7bda40d059629bc7770d84371235cdb1352a4f17f80e145

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                            Filesize

                            10KB

                            MD5

                            5a40c2ce7294311fc15ec27cc13ec54b

                            SHA1

                            be4caa907ccf35c18718c60207ed34d83ccf6bf8

                            SHA256

                            c572df05f7ef2deb3787693d6d4ab7d0cbcb371e3edfc2b8b6e71426bd56180a

                            SHA512

                            92e99818cfac62f9f30abcc4942e31bdd66daa1e1a1fa99fa9d8e5dd743afe33ca73ebbad903306bcde14c9870be5f36c9ede0d588418e42ed2136476dd59886

                          • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

                            Filesize

                            10KB

                            MD5

                            76fbe77cbc68f3bd5f0decad25775716

                            SHA1

                            2ebc2dea0b2224ea73fb5413d94ad38218122bf3

                            SHA256

                            8d59129db45c9f234318144380c9d167d89a9faa8e2a6aede9b5a3bcfdf650b6

                            SHA512

                            1a5d850914bd033defe42de3a333c2a7497927a07289258acd5ec08e973b4ed45030b0f299d6da5bac16ad607ed471b3db52a5c9676a532ecaa0836682618230

                          • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

                            Filesize

                            10KB

                            MD5

                            0c71204dc7dd088aa8f1b279e29d7bf5

                            SHA1

                            475dbeb8589312574e6b5f3ca2913b8b80af155b

                            SHA256

                            28f655f695c0992c73fa7b02fca2c93b65aec5b8c82297e1be30ed9016eb54a1

                            SHA512

                            f10ec78286923446833e4f19900a790be0440885688fe273a811648de090a765ea82ef8ccc062987ec12285e0de608b803671d01358a18dd4504f90845169826

                          • C:\Users\Admin\AppData\Roaming\FlrefoxUpdate.exe

                            Filesize

                            170KB

                            MD5

                            200eb10c73336127006740ae06003933

                            SHA1

                            32ef06528018d4f9fc8da3a7e7e07363b3a143f4

                            SHA256

                            b46624ea261bec807dc1f93431ab3156450646976443c27322a7a9c4eec5e5f0

                            SHA512

                            026eb0e018f25449f664dbc2655cfb5c360fd60a928fec344bd31b3cefa01a3fcce4dd1fc87b3aabce7557db57cb1247a1984c69b3ecb00d83f388fd6b09a0ce

                          • memory/2488-27-0x0000000002630000-0x000000000263A000-memory.dmp

                            Filesize

                            40KB

                          • memory/2488-0-0x00007FFFAB0F3000-0x00007FFFAB0F5000-memory.dmp

                            Filesize

                            8KB

                          • memory/2488-5-0x00007FFFAB0F0000-0x00007FFFABBB2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/2488-4-0x00007FFFAB0F3000-0x00007FFFAB0F5000-memory.dmp

                            Filesize

                            8KB

                          • memory/2488-3-0x00007FFFAB0F0000-0x00007FFFABBB2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/2488-1-0x00000000004E0000-0x0000000000510000-memory.dmp

                            Filesize

                            192KB