Analysis

  • user interaction
    yes
  • max time kernel
    76s
  • max time network
    70s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    24/09/2026, 08:29

General

  • Target
    winmail.tnef
  • Size 1KB
  • Sample260924-kdl4csssft
  • SHA256 e2787bccd17657fbcb942cd4d81d88982c4f520f6c41880614505592e9a7708e
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 18 IoCs

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

  • Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 13 IoCs
  • Modifies registry class 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 22 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of SetWindowsHookEx 53 IoCs
  • Suspicious use of WriteProcessMemory 38 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:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\winmail.tnef
    1⤵
    • Executes a command shell one-liner
    • Modifies registry class
    PID:2468
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5328
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "C:\Users\Admin\AppData\Local\Temp\winmail.tnef"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4400
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url C:\Users\Admin\AppData\Local\Temp\winmail.tnef
        3⤵
        • 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:2112
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2020 -prefsLen 27099 -prefMapHandle 2024 -prefMapSize 270279 -ipcHandle 2100 -initialChannelId {7177b873-2ecd-4e2a-8185-a3ae0222c786} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
          4⤵
            PID:1504
          • 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 {0da3ce68-0878-4ffb-94ef-2d49f1986c98} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
            4⤵
              PID:220
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3044 -prefsLen 27276 -prefMapHandle 3004 -prefMapSize 270279 -jsInitHandle 3008 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3092 -initialChannelId {cb5bf7e8-3f96-407e-b2e9-5b3851a2182f} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
              4⤵
              • Checks processor information in registry
              PID:1824
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 3096 -prefsLen 27276 -prefMapHandle 3712 -prefMapSize 270279 -ipcHandle 3780 -initialChannelId {7112341b-576d-4a91-adc1-7e8775843b0c} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
              4⤵
                PID:684
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 4308 -prefsLen 34775 -prefMapHandle 4312 -prefMapSize 270279 -jsInitHandle 4316 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4288 -initialChannelId {18468fe6-ca15-49da-be6f-8711a38edf6d} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
                4⤵
                • Checks processor information in registry
                PID:5620
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 2876 -prefsLen 35012 -prefMapHandle 2880 -prefMapSize 270279 -ipcHandle 4932 -initialChannelId {a3e819f2-d10a-4a80-95ad-0ba3168de409} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
                4⤵
                • Checks processor information in registry
                PID:6036
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5340 -prefsLen 32900 -prefMapHandle 5344 -prefMapSize 270279 -jsInitHandle 5348 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5356 -initialChannelId {0502e0c9-7b82-4255-bed6-3de62bbefd54} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
                4⤵
                • Checks processor information in registry
                PID:1404
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5520 -prefsLen 32952 -prefMapHandle 5524 -prefMapSize 270279 -jsInitHandle 5592 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5600 -initialChannelId {55386aa2-e1d8-40be-b254-4fd5903260f8} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
                4⤵
                • Checks processor information in registry
                PID:1628
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5800 -prefsLen 32952 -prefMapHandle 5804 -prefMapSize 270279 -jsInitHandle 5808 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5816 -initialChannelId {f7e074b9-e9f0-44ed-a21f-c261441cd8b5} -parentPid 2112 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2112" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
                4⤵
                • Checks processor information in registry
                PID:3996
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\AppData\Local\Temp\winmail.tnef
          1⤵
          • Modifies Internet Explorer Phishing Filter
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:640
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:640 CREDAT:17410 /prefetch:2
            2⤵
            • System Location Discovery: System Language Discovery
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:3384

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              AABAB860D2646FDCEACF8AAC0CD412654CE5E4C0

              • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\0inymrgq.default-release\cache2\entries\AABAB860D2646FDCEACF8AAC0CD412654CE5E4C0
              • Size 16KB
              • SHA256 aca37af650c8c5f49515b5661eef0eee342170b55f962ef85d8a9bc2faa3ea5c
              • 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\0inymrgq.default-release\datareporting\glean\db\data.safe.tmp
              • Size 3KB
              • SHA256 3e2f219d750d4cd8bbe2bfbb51e56a29443cc96adf7e01d06fd792f7a0aea661
              • MD5 SHA1 SHA512 TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\db\data.safe.tmp
              • Size 6KB
              • SHA256 beac080451d8a4a3aac4e33e4c752eb2105942fc719fc103118d886d0aa5777c
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\db\data.safe.tmp
              • Size 7KB
              • SHA256 b08da94b0253f7b10784e97199bd9b44cf9b1bcaadb491bd01b28625fd69b43c
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\db\data.safe.tmp
              • Size 7KB
              • SHA256 28a3e8b042f6bf92f929cd5193200aaec9d6f87f6e384c6e2193c1c64873acd0
              • MD5 SHA1 SHA512 SSDEEP TLSH

              events

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\events\events
              • Size 1KB
              • SHA256 1f99e01f44a54aad037fca268cdd45de909922ca2aad2808acf5267d5c203f0a
              • MD5 SHA1 SHA512 TLSH

              26f7304c-e864-4b28-ad07-df32f86b6bdc

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\26f7304c-e864-4b28-ad07-df32f86b6bdc
              • Size 2KB
              • SHA256 e9e9f947f3fe937ca119b095c430aaa0ecb57c15581f1101c4c7b1830406983d
              • MD5 SHA1 SHA512 TLSH

              515e2e10-68a1-4f0c-ac9a-83b466882adb

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\515e2e10-68a1-4f0c-ac9a-83b466882adb
              • Size 883B
              • SHA256 e3231320649412bcbc5447ab99bdd69bc0fb3212a17d243f97c1a834466c7a41
              • MD5 SHA1 SHA512 TLSH

              51eeefb9-66cf-4c86-acf8-a6160cbe7c80

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\51eeefb9-66cf-4c86-acf8-a6160cbe7c80
              • Size 886B
              • SHA256 cc39d23d578cf0624ec2e1e2de426f2916834f076d55c453884549d0eb17d75d
              • MD5 SHA1 SHA512 TLSH

              90f4a6d8-58eb-41f6-808a-a437a11cae68

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\90f4a6d8-58eb-41f6-808a-a437a11cae68
              • Size 235B
              • SHA256 a19ca889f9ba19f4218be2fba9a0f7c80593cd5989438a569092efaa2c3f2771
              • MD5 SHA1 SHA512 TLSH

              bb010324-7a34-4a1d-8b31-c66254030a20

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\bb010324-7a34-4a1d-8b31-c66254030a20
              • Size 15KB
              • SHA256 4ab31c6d0421e35f87574c9cddb8fb952be42ff496e284c6bd16f6b93fafeaa7
              • MD5 SHA1 SHA512 SSDEEP TLSH

              cb0ca45f-91e0-4340-8be6-f9c91ca25401

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\datareporting\glean\pending_pings\cb0ca45f-91e0-4340-8be6-f9c91ca25401
              • Size 235B
              • SHA256 dcc3957109cb8f2bb92dac50dfb590872f1d9f65e0de19fde8a6f7d49b01da8f
              • MD5 SHA1 SHA512 TLSH

              extensions.json

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\extensions.json
              • Size 16KB
              • SHA256 e55e3118b021898a71401cb2559f2d5c74f56922d04a6d1bc6463a892e576420
              • MD5 SHA1 SHA512 SSDEEP TLSH

              gmpopenh264.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.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\0inymrgq.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\0inymrgq.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\0inymrgq.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\0inymrgq.default-release\prefs-1.js
              • Size 6KB
              • SHA256 68636d9a7fc2757de61a0304f8d08ba8e0cc264e7ffdf4900c011e6ba9970142
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\prefs.js
              • Size 6KB
              • SHA256 aa9d08461d97e77f70d76aadd5af18d5e40998bb488c211ea316680fb3760f5e
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\prefs.js
              • Size 7KB
              • SHA256 4763120d900e64a165caed683e03933599a8e2b4891caa37f3d293e27c242fba
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\0inymrgq.default-release\sessionstore-backups\recovery.baklz4
              • Size 1KB
              • SHA256 c1575370e1dfd12e348de9801572a3a7bbf075ac6eda7236ec9ef463d4ac3dfe
              • MD5 SHA1 SHA512 TLSH

              zINAHW4Q.tnef.part

              • Path C:\Users\Admin\Downloads\zINAHW4Q.tnef.part
              • Size 1KB
              • SHA256 e2787bccd17657fbcb942cd4d81d88982c4f520f6c41880614505592e9a7708e
              • MD5 SHA1 SHA512 TLSH