Analysis

  • user interaction
    yes
  • max time kernel
    36s
  • max time network
    42s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260126-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260126-enlocale:en-usos:windows10-ltsc_2021-x64system
  • submitted
    20/04/2026, 13:00

General

  • Target
    https://api.instafin.pl/api/p/agreements/download-preview-doc/credit_information_form_preview?code=pdl&amount=1000&tenor=30
  • Sample260420-p8metsfs7x

Malware Config

Signatures

  • Drops desktop.ini file(s) 3 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Checks processor information in registry 2 TTPs 18 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 18 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of SetWindowsHookEx 1 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 "https://api.instafin.pl/api/p/agreements/download-preview-doc/credit_information_form_preview?code=pdl&amount=1000&tenor=30"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4432
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url https://api.instafin.pl/api/p/agreements/download-preview-doc/credit_information_form_preview?code=pdl&amount=1000&tenor=30
      2⤵
      • Drops desktop.ini file(s)
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4296
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2020 -prefsLen 27100 -prefMapHandle 2024 -prefMapSize 270279 -ipcHandle 2100 -initialChannelId {bdb68196-071a-450d-a4b1-2f4770b11b7b} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
        3⤵
          PID:4516
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2500 -prefsLen 27136 -prefMapHandle 2504 -prefMapSize 270279 -ipcHandle 2512 -initialChannelId {5805a5f8-298e-4e74-89a6-7ae88ed47eaa} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
          3⤵
            PID:2928
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3836 -prefsLen 25164 -prefMapHandle 3840 -prefMapSize 270279 -jsInitHandle 3844 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3852 -initialChannelId {9c177a90-1b96-4d15-9681-6fa08ddc4d3d} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
            3⤵
            • Checks processor information in registry
            PID:4744
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 4028 -prefsLen 27277 -prefMapHandle 4032 -prefMapSize 270279 -ipcHandle 3836 -initialChannelId {8d4036d3-84bb-4ecc-a3bd-51c34726ce9b} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
            3⤵
              PID:5528
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 4440 -prefsLen 34776 -prefMapHandle 4444 -prefMapSize 270279 -jsInitHandle 4448 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4464 -initialChannelId {f1ae43c1-3f24-4c03-a286-7793b9ac80b4} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
              3⤵
              • Checks processor information in registry
              PID:6012
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 5112 -prefsLen 35013 -prefMapHandle 5116 -prefMapSize 270279 -ipcHandle 4984 -initialChannelId {9c1c428b-c774-4323-af66-a6bfadea900f} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
              3⤵
              • Checks processor information in registry
              PID:5308
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2116 -prefsLen 32952 -prefMapHandle 1620 -prefMapSize 270279 -jsInitHandle 5532 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4448 -initialChannelId {1bc7f210-c199-4b24-8598-26110a18a50b} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
              3⤵
              • Checks processor information in registry
              PID:1368
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5616 -prefsLen 32952 -prefMapHandle 5260 -prefMapSize 270279 -jsInitHandle 5632 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5640 -initialChannelId {98b0f392-aeef-44ff-a31d-983b382043cb} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
              3⤵
              • Checks processor information in registry
              PID:1704
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5812 -prefsLen 32952 -prefMapHandle 5816 -prefMapSize 270279 -jsInitHandle 5820 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5828 -initialChannelId {44e86f96-fcb4-498d-a6c7-03e2ee957727} -parentPid 4296 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4296" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
              3⤵
              • Checks processor information in registry
              PID:1628

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              CD1C116DEEE8F4F97C1806976E10E7E2B349E486

              • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\1r2x66wx.default-release\cache2\entries\CD1C116DEEE8F4F97C1806976E10E7E2B349E486
              • Size 13KB
              • SHA256 973db59b73602139de55028b5a33d355061a2fcafb05fe754608d65f67fe6121
              • MD5 SHA1 SHA512 SSDEEP TLSH

              webext.sc.lz4

              • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\1r2x66wx.default-release\startupCache\webext.sc.lz4
              • Size 105KB
              • SHA256 f104764a249d214cc3c66ea0311e98e7831dd59749a086c3d09f80aac2f5c71c
              • 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\1r2x66wx.default-release\datareporting\glean\db\data.safe.tmp
              • Size 43KB
              • SHA256 789d17c4a287e78317ec9a89b9c65c1d67eaf64ebee13b0462189966d79247e5
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\db\data.safe.tmp
              • Size 6KB
              • SHA256 a4630445f93d9fed6a461e16331ef1df8b9e39cfed88db428a2214672452abe7
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\db\data.safe.tmp
              • Size 6KB
              • SHA256 84361621e6d2fde5b1d5428cb5479ced66f9d0b939bf0d84408037d5495b1abe
              • MD5 SHA1 SHA512 SSDEEP TLSH

              events

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\events\events
              • Size 1KB
              • SHA256 65ca3656dfa06951b23929dcf45f26335233cb921b8518399cbea2e1b20e8353
              • MD5 SHA1 SHA512 TLSH

              4316bb81-f2a7-4186-82b4-9c1331b1e57f

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\4316bb81-f2a7-4186-82b4-9c1331b1e57f
              • Size 235B
              • SHA256 216dfc6d706c765c52365105754c970628ff544db2d68b4f98295c9d70412906
              • MD5 SHA1 SHA512 TLSH

              4b102cad-d6ac-44bc-8b11-97c8f7eb99e5

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\4b102cad-d6ac-44bc-8b11-97c8f7eb99e5
              • Size 2KB
              • SHA256 b3ce5684b2d4e561ae9292e326b13d63884697ea0ddd6be1842b2bc6dff79432
              • MD5 SHA1 SHA512 TLSH

              5e946439-2ffd-4e28-8ef8-2049c2fb4fa1

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\5e946439-2ffd-4e28-8ef8-2049c2fb4fa1
              • Size 17KB
              • SHA256 38004a4682aa2a59a0e2606973f8c569b1db39f32d38fe4583d6cc45f7537bba
              • MD5 SHA1 SHA512 SSDEEP TLSH

              6515952b-9dee-4547-be52-b677b9827d45

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\6515952b-9dee-4547-be52-b677b9827d45
              • Size 886B
              • SHA256 092e6a58cb3ee44078d1a299a8d931f6100477d8260beb72a10c1ce852101cdf
              • MD5 SHA1 SHA512 TLSH

              bbbfc1e8-2d02-499e-a413-ba84f05f5baf

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\bbbfc1e8-2d02-499e-a413-ba84f05f5baf
              • Size 883B
              • SHA256 a3c829edd975b1ea04fcd05d14cfb519d0ed3e5b19413e5b24dcb26369278ea0
              • MD5 SHA1 SHA512 TLSH

              c3413f65-6bec-490c-856f-cda8112603d9

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\datareporting\glean\pending_pings\c3413f65-6bec-490c-856f-cda8112603d9
              • Size 235B
              • SHA256 d2f4b21ee85d3dcdbdb66990534a4d8d43a78a8ff7e6d43f9e4231b56e585ee4
              • MD5 SHA1 SHA512 TLSH

              extensions.json

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\extensions.json
              • Size 16KB
              • SHA256 479f0bb8adaec07b8f5ad8acb0843ef6e8c19a0c077d42afbfdd2086ba6c58cf
              • MD5 SHA1 SHA512 SSDEEP TLSH

              gmpopenh264.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.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\1r2x66wx.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\1r2x66wx.default-release\gmp-widevinecdm\4.10.2934.0\manifest.json
              • Size 1001B
              • SHA256 25ac9b79df29fa869b4c9f4ca3bdbc3a85f6122f5a8efab5a1216d577099becc
              • MD5 SHA1 SHA512 TLSH

              widevinecdm.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\gmp-widevinecdm\4.10.2934.0\widevinecdm.dll
              • Size 8.8MB
              • SHA256 f1e5bf234e81be1386a118aaf2fea5bf25880eb09efb714da768850b1647e83e
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\prefs-1.js
              • Size 8KB
              • SHA256 b37f63fa4d598b643e303c0c1d7cf02fa3e7c430d1e4c80acc150f01e842ffe8
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\prefs-1.js
              • Size 6KB
              • SHA256 fc984d35983420052fcee43916767d7c4d5c6302a7c7e72b7d8386ba3a30fcaf
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\prefs.js
              • Size 6KB
              • SHA256 200abdba422cfe63fdd9be467f5e994d5f8d2b68656257a02b596c39727edf8a
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\prefs.js
              • Size 7KB
              • SHA256 c7d2b3c38ee837a3e1e1719cb5d51f989b3e8f31189000ea045f772fd48971c2
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\sessionstore-backups\recovery.baklz4
              • Size 1KB
              • SHA256 cdce36238e2eb155d4025510d12d8f174cdd527c077ded2376aad48cc3253b3d
              • MD5 SHA1 SHA512 TLSH

              recovery.jsonlz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\1r2x66wx.default-release\sessionstore-backups\recovery.jsonlz4
              • Size 2KB
              • SHA256 891e0d1f89cb9f3028d1b1611bad0c860232e9ae71f2d7beeb61e39b5ac73bd7
              • MD5 SHA1 SHA512 TLSH