Resubmissions

21/04/2026, 00:43

260421-a23qxagw7k3

21/04/2026, 00:41

260421-a2aecsat6z1

Analysis

  • user interaction
    yes
  • max time kernel
    42s
  • max time network
    43s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    21/04/2026, 00:41

General

  • Target
    http://loser.freetls.fastly
  • Sample260421-a2aecsat6z
Score
1/10

Malware Config

Signatures

  • Checks processor information in registry 2 TTPs 18 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 36 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:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "http://loser.freetls.fastly"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url http://loser.freetls.fastly
      2⤵
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1352
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 1976 -prefsLen 27097 -prefMapHandle 1980 -prefMapSize 270279 -ipcHandle 1948 -initialChannelId {b5f8e657-f7ba-4671-b7cb-9e2cc6460b51} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
        3⤵
          PID:4124
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2428 -prefsLen 27133 -prefMapHandle 2432 -prefMapSize 270279 -ipcHandle 2440 -initialChannelId {81d7a020-e92f-47de-a827-9f7c33e97117} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
          3⤵
            PID:764
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3880 -prefsLen 25213 -prefMapHandle 3884 -prefMapSize 270279 -jsInitHandle 3888 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3896 -initialChannelId {8f808acf-5e48-4edd-9fcb-946c6de79567} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
            3⤵
            • Checks processor information in registry
            PID:4988
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 4040 -prefsLen 27323 -prefMapHandle 4044 -prefMapSize 270279 -ipcHandle 4116 -initialChannelId {f7214902-95d7-43fe-8f62-5256847c2be5} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
            3⤵
              PID:1872
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3084 -prefsLen 34822 -prefMapHandle 2740 -prefMapSize 270279 -jsInitHandle 2772 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 2700 -initialChannelId {e92ce828-ca2c-45e3-8143-196d521adf44} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
              3⤵
              • Checks processor information in registry
              PID:4380
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 5044 -prefsLen 34903 -prefMapHandle 5048 -prefMapSize 270279 -ipcHandle 5016 -initialChannelId {2ae266ed-e18d-451f-9e30-a92e90a0b69b} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
              3⤵
              • Checks processor information in registry
              PID:1880
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5640 -prefsLen 32845 -prefMapHandle 5644 -prefMapSize 270279 -jsInitHandle 5648 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 2780 -initialChannelId {32d1014a-9511-43f4-a1e3-9ad6c65ee01d} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
              3⤵
              • Checks processor information in registry
              PID:2204
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5768 -prefsLen 32845 -prefMapHandle 5772 -prefMapSize 270279 -jsInitHandle 5776 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5784 -initialChannelId {1a2bc79a-d16d-4571-9c52-dc42f0f4b2d0} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
              3⤵
              • Checks processor information in registry
              PID:2956
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5924 -prefsLen 32845 -prefMapHandle 5920 -prefMapSize 270279 -jsInitHandle 5916 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5908 -initialChannelId {e706b18e-dbe6-43c6-9fd6-6b66afb91348} -parentPid 1352 -crashReporter "\\.\pipe\gecko-crash-server-pipe.1352" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
              3⤵
              • Checks processor information in registry
              PID:1700
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
          1⤵
            PID:900

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                activity-stream.discovery_stream.json.tmp

                • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\8bpv94fp.default-release\activity-stream.discovery_stream.json.tmp
                • Size 22KB
                • SHA256 fe2c61ee4829295bd32bad57d5286014ff56e07a428a84489d7f42d4139a2f87
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\db\data.safe.tmp
                • Size 29KB
                • SHA256 5950553e00bf188ee83ef245e4b818edc688abb39e217eb467147688f2c8a581
                • MD5 SHA1 SHA512 SSDEEP TLSH

                data.safe.tmp

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\db\data.safe.tmp
                • Size 29KB
                • SHA256 d7794d90e778230b08d8dc77274dcbe43b7f3752d0d4b4e699f67e4f5c245b55
                • MD5 SHA1 SHA512 SSDEEP TLSH

                events

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\events\events
                • Size 1KB
                • SHA256 726ba5d06d77873e22f97d781607262b22a4df328ffd99262d2256eae9bdc9a1
                • MD5 SHA1 SHA512 TLSH

                3fce1280-a517-49cd-b21d-5b50dbe1d203

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\pending_pings\3fce1280-a517-49cd-b21d-5b50dbe1d203
                • Size 871B
                • SHA256 e18d3a2376f2d56e97a9b509d4494ad0ccb4054e414464bbe12a0e6aebf8eca2
                • MD5 SHA1 SHA512 TLSH

                49fd848c-b579-43ea-86c9-2eb98a42bd56

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\pending_pings\49fd848c-b579-43ea-86c9-2eb98a42bd56
                • Size 235B
                • SHA256 205420c89696e91292caf266823280d2d9634d8d22cc76b882bd1debd4ad6909
                • MD5 SHA1 SHA512 TLSH

                6368cc65-18ca-4af7-8d2c-5520659d9374

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\pending_pings\6368cc65-18ca-4af7-8d2c-5520659d9374
                • Size 886B
                • SHA256 e414100d6ace3770aaf60f6b84dfdfb348e31e5c64ed9a79ee8a57d77f4806f8
                • MD5 SHA1 SHA512 TLSH

                9f8dd797-d20a-4625-a0a5-a7bc3b160175

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\pending_pings\9f8dd797-d20a-4625-a0a5-a7bc3b160175
                • Size 235B
                • SHA256 535a91d5395a0161291cf1bda12e9a060fb6d40af8db8c8e887e3109f25ce48e
                • MD5 SHA1 SHA512 TLSH

                d5f2b20c-316e-4c7e-98f3-ad5d3bc39d92

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\datareporting\glean\pending_pings\d5f2b20c-316e-4c7e-98f3-ad5d3bc39d92
                • Size 2KB
                • SHA256 81b0616057dde95bec6b47f5bcd8e121ba6ba3528ff508d68b4324a5ed62cb4d
                • MD5 SHA1 SHA512 TLSH

                prefs-1.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\prefs-1.js
                • Size 7KB
                • SHA256 c61ef18c5c45a936d1a67422fa2e3c44a85160e8b955cde26c43e2c9ce5694b6
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\prefs.js
                • Size 6KB
                • SHA256 bc6787e8d3e81a4c296d8c5c4ef64d39b49392e90031d3f3250c7d8b54d031ea
                • MD5 SHA1 SHA512 SSDEEP TLSH

                prefs.js

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\prefs.js
                • Size 6KB
                • SHA256 3ff15ebfbb4b92dbca133e7d790739dfa9809574bdee917793f703c17ff51066
                • MD5 SHA1 SHA512 SSDEEP TLSH

                recovery.baklz4

                • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\8bpv94fp.default-release\sessionstore-backups\recovery.baklz4
                • Size 1KB
                • SHA256 e4e5a3684f090795897b146477d0702d92bb6913912f35cdda70b68c51c23e0b
                • MD5 SHA1 SHA512 TLSH