Analysis

  • user interaction
    yes
  • max time kernel
    98s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    05/07/2026, 17:16

General

  • Target
    F6IslN.html
  • Size 11KB
  • Sample260705-vs4baset5z
  • SHA256 d311a4f486e2f81d1ffb11b37782d8bc1325b1df96ff21ab3b3de818ae3d5d84
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Downloads MZ/PE file 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 4 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 7 IoCs
  • Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 1 IoCs

    When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Checks processor information in registry 2 TTPs 24 IoCs

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

  • Modifies registry class 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SetWindowsHookEx 23 IoCs
  • Suspicious use of WriteProcessMemory 49 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 "C:\Users\Admin\AppData\Local\Temp\F6IslN.html"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3512
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url C:\Users\Admin\AppData\Local\Temp\F6IslN.html
      2⤵
      • Downloads MZ/PE file
      • Subvert Trust Controls: Mark-of-the-Web Bypass
      • Checks processor information in registry
      • Modifies registry class
      • NTFS ADS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3812
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2028 -prefsLen 27099 -prefMapHandle 2032 -prefMapSize 270279 -ipcHandle 2100 -initialChannelId {d1cd8030-3244-4f15-91c4-135f6feb7642} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
        3⤵
          PID:4100
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2500 -prefsLen 27135 -prefMapHandle 2504 -prefMapSize 270279 -ipcHandle 2512 -initialChannelId {e4263df4-ec3d-4a51-9d1a-82b9df06e89f} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
          3⤵
            PID:4344
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3808 -prefsLen 27276 -prefMapHandle 3812 -prefMapSize 270279 -jsInitHandle 3816 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3824 -initialChannelId {44bb098f-6ce5-4be1-9c5a-cd892e1ad281} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
            3⤵
            • Checks processor information in registry
            PID:1980
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 3972 -prefsLen 27276 -prefMapHandle 3976 -prefMapSize 270279 -ipcHandle 4044 -initialChannelId {5d035dbe-64c8-4754-9c00-fa8839f1e12d} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
            3⤵
              PID:1640
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2780 -prefsLen 34775 -prefMapHandle 4388 -prefMapSize 270279 -jsInitHandle 4392 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4400 -initialChannelId {be1a7d0b-244f-4b63-b7ae-8a4a70c7958b} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
              3⤵
              • Checks processor information in registry
              PID:4632
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 4904 -prefsLen 35012 -prefMapHandle 4908 -prefMapSize 270279 -ipcHandle 4916 -initialChannelId {3d3c01b2-245e-4237-a053-0c96bb870e54} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
              3⤵
              • Checks processor information in registry
              PID:2268
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2904 -prefsLen 32952 -prefMapHandle 5124 -prefMapSize 270279 -jsInitHandle 5128 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5136 -initialChannelId {40f0e02f-69d4-4d81-bda5-1d38d4c98e5a} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
              3⤵
              • Checks processor information in registry
              PID:824
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5348 -prefsLen 32952 -prefMapHandle 5352 -prefMapSize 270279 -jsInitHandle 5356 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5368 -initialChannelId {e69082f5-3c18-4608-aa99-4b2c4e953772} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
              3⤵
              • Checks processor information in registry
              PID:4184
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5384 -prefsLen 32952 -prefMapHandle 5388 -prefMapSize 270279 -jsInitHandle 5392 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5396 -initialChannelId {6471d330-2412-4055-b4f0-bccba8ae1fb7} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
              3⤵
              • Checks processor information in registry
              PID:3808
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2792 -prefsLen 33031 -prefMapHandle 5852 -prefMapSize 270279 -jsInitHandle 2796 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 6056 -initialChannelId {e36a544c-80c4-439a-a416-ca8f5df92a27} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 10 tab
              3⤵
              • Checks processor information in registry
              PID:4348
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 6216 -prefsLen 35160 -prefMapHandle 5768 -prefMapSize 270279 -jsInitHandle 5292 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5276 -initialChannelId {0f7aaf45-91b4-4e96-b86d-e7a8830b33f1} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 11 tab
              3⤵
              • Checks processor information in registry
              PID:1544
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 6688 -prefsLen 36718 -prefMapHandle 6712 -prefMapSize 270279 -jsInitHandle 6220 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 6636 -initialChannelId {db238664-9e13-41de-b0be-9fb9c84c62f1} -parentPid 3812 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3812" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 12 tab
              3⤵
              • Checks processor information in registry
              PID:4040
            • C:\Users\Admin\Downloads\EMULATOR.exe
              "C:\Users\Admin\Downloads\EMULATOR.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of SetWindowsHookEx
              PID:5824

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              9512A4488B00CC053350DAC32D417B4A35C11513

              • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\nxqdpovk.default-release\cache2\entries\9512A4488B00CC053350DAC32D417B4A35C11513
              • Size 13KB
              • SHA256 34baac282797e618befa2b4af92ebffcdc1cf25f7c48c6eab9a71307190f2521
              • MD5 SHA1 SHA512 SSDEEP TLSH

              tmpaddon

              • Path C:\Users\Admin\AppData\Local\Temp\tmpaddon
              • Size 11KB
              • SHA256 ddf3ba4e25a622276755133e0cce5605b83719c7cab3546e09acbfed00d6a986
              • MD5 SHA1 SHA512 SSDEEP TLSH

              tmpaddon

              • Path C:\Users\Admin\AppData\Local\Temp\tmpaddon
              • Size 502KB
              • SHA256 87862f4bc8559fbe578389a9501dc01c4c585edb4bb03b238493327296d60171
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\db\data.safe.tmp
              • Size 6KB
              • SHA256 761b28f0a8367b159fe4150609c9737c233bbf081dd62e848836fcea39cff13b
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\db\data.safe.tmp
              • Size 7KB
              • SHA256 852198f7d6ffc2d06d3f0ab4d292699c4c5e00adfa124cb1df84781032f7ffae
              • MD5 SHA1 SHA512 SSDEEP TLSH

              events

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\events\events
              • Size 1KB
              • SHA256 5fc5b0c58ef39cc8dbdc11e96bde64432b2765a3a6a840762bdaeb23c4a9cd5b
              • MD5 SHA1 SHA512 TLSH

              4bc183ae-9daa-4ae6-97ce-cd1f6452eff1

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\4bc183ae-9daa-4ae6-97ce-cd1f6452eff1
              • Size 883B
              • SHA256 fd60373251b09dea4e2a124e631d39987303d4bf9ae7d3459cafe294dc0aaaf8
              • MD5 SHA1 SHA512 TLSH

              579f71b6-55c2-4936-95ac-9e1dc19e99b2

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\579f71b6-55c2-4936-95ac-9e1dc19e99b2
              • Size 15KB
              • SHA256 0d3e6cd69f7a516ecc985e20cfba831c715a0690c1fc9a57efdeefcd54c70e3d
              • MD5 SHA1 SHA512 SSDEEP TLSH

              85df0e21-a89f-441d-9980-a1426237f9f4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\85df0e21-a89f-441d-9980-a1426237f9f4
              • Size 886B
              • SHA256 d009eee6fd9131136b06175395d7190995419dc72b218d3d1e2e407021e8e48c
              • MD5 SHA1 SHA512 TLSH

              d7210bb6-08a5-41f1-9ffa-4d30780ee541

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\d7210bb6-08a5-41f1-9ffa-4d30780ee541
              • Size 235B
              • SHA256 a136f570963f6b3452c645ebb745a198bedea792606b5680479985c74698e2a7
              • MD5 SHA1 SHA512 TLSH

              e2d3fa7d-0007-4e57-b309-b3f27202957d

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\e2d3fa7d-0007-4e57-b309-b3f27202957d
              • Size 235B
              • SHA256 4b2ce000816e2f894b6c656d624f765f4e87de25d44737655e3e568671fff042
              • MD5 SHA1 SHA512 TLSH

              f1cb4e55-e73e-4e6d-81b3-04b75365b751

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\datareporting\glean\pending_pings\f1cb4e55-e73e-4e6d-81b3-04b75365b751
              • Size 2KB
              • SHA256 8db5cd0cb6cd57c0d4e33b743825666f17ff7697053b47114d652b6f44349db6
              • MD5 SHA1 SHA512 TLSH

              extensions.json

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\extensions.json
              • Size 16KB
              • SHA256 a267ae6311150e019fb6c056c1ca449488f3032b0c9d95391ed50de8a17c5d13
              • MD5 SHA1 SHA512 SSDEEP TLSH

              gmpopenh264.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\gmp-gmpopenh264\2.6.0\gmpopenh264.dll
              • Size 1.1MB
              • SHA256 37c005a7789747b412d6c0a6a4c30d15732da3d857b4f94b744be1a67231b651
              • MD5 SHA1 SHA512 SSDEEP TLSH

              gmpopenh264.info

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\gmp-gmpopenh264\2.6.0\gmpopenh264.info
              • Size 116B
              • SHA256 fe7686a6281f0ab519c32c788ce0da0d01640425018dcffcfcb81105757f6fe6
              • MD5 SHA1 SHA512 TLSH

              manifest.json

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\gmp-widevinecdm\4.10.3050.0\manifest.json
              • Size 1002B
              • SHA256 2894996540fabbd346ed4ced8386ca77d6badf60372e307ee15c906c30340d0d
              • MD5 SHA1 SHA512 TLSH

              widevinecdm.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\gmp-widevinecdm\4.10.3050.0\widevinecdm.dll
              • Size 21.6MB
              • SHA256 f1216e26ee8c27f938d7722427d29f190e569ed83d0ba16ea872cae684b97602
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\prefs-1.js
              • Size 7KB
              • SHA256 cf2dc3924b15da08b9498f124929e7d5e6718729408231c6a04cb48269f19e77
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\prefs.js
              • Size 6KB
              • SHA256 574930d86eb44c0d6d5baed4a626887a5c153d97b48ec2282528670003705c0c
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\prefs.js
              • Size 6KB
              • SHA256 3d899ad6c1cfd7c49c39dc98555efc81aa1ccdd99918a522f5337a727f6f25c5
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionstore-backups\recovery.baklz4
              • Size 6KB
              • SHA256 c5ef2733e2f6e0dfc6d24ef70cc2693ffb73a1e3a6a7675928cb46166c1538eb
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionstore-backups\recovery.baklz4
              • Size 6KB
              • SHA256 8c96815622b83f06e901f667cd2d826c781fedfbb02dcc6ff8b2a09c53d98c0f
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionstore-backups\recovery.baklz4
              • Size 1KB
              • SHA256 390a7345248adbcc5f3eda001cab89d1536affac9f0e1fb32fd2c5c45858dc46
              • MD5 SHA1 SHA512 TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionstore-backups\recovery.baklz4
              • Size 6KB
              • SHA256 3d8253ef9b227795135e10cedcbe0d3dce42d090d64c09fbc9b78f61b29f7c86
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\sessionstore-backups\recovery.baklz4
              • Size 5KB
              • SHA256 2d93e78a777b40e52fc1729cd6db9670301367b1d32328a6fe7f249afba77567
              • MD5 SHA1 SHA512 SSDEEP TLSH

              3870112724rsegmnoittet-es.sqlite

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\nxqdpovk.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite
              • Size 4.5MB
              • SHA256 fe40abd712ace9e9d0468f2371e6ad1c77ccb5d3e46f53a404cf9875c48f3c43
              • MD5 SHA1 SHA512 SSDEEP TLSH

              EMULATOR.3P64Yhx2.exe.part

              • Path C:\Users\Admin\Downloads\EMULATOR.3P64Yhx2.exe.part
              • Size 20.1MB
              • SHA256 324b5844650ee36391f527880502a7eac8c9d0a605988951fb6bd294e5ff41d2
              • MD5 SHA1 SHA512 SSDEEP TLSH

              memory/5824-852-0x0000000140161000-0x0000000140D71000-memory.dmp

              memory/5824-860-0x00007FF9573C0000-0x00007FF9573C2000-memory.dmp

              memory/5824-859-0x00007FF9573B0000-0x00007FF9573B2000-memory.dmp

              memory/5824-865-0x0000000140000000-0x0000000142187000-memory.dmp

              memory/5824-866-0x00000000001F0000-0x00000000001F1000-memory.dmp

              memory/5824-861-0x0000000140000000-0x0000000142187000-memory.dmp

              memory/5824-867-0x0000000140000000-0x0000000142187000-memory.dmp

              memory/5824-868-0x0000000140000000-0x0000000142187000-memory.dmp

              memory/5824-869-0x0000000140161000-0x0000000140D71000-memory.dmp

              memory/5824-870-0x0000000140000000-0x0000000142187000-memory.dmp

              memory/5824-877-0x0000000140000000-0x0000000142187000-memory.dmp