Analysis

  • user interaction
    yes
  • max time kernel
    112s
  • max time network
    117s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260618-ja
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260618-jalocale:ja-jpos:windows11-ltsc_2024-x64systemwindows
  • submitted
    27/06/2026, 00:00

General

  • Target
    kouma_update102f.exe
  • Size 820KB
  • Sample260627-aahawsgs3l
  • SHA256 fb6dfa3f75d325e644262887adb24bfaf138216bb9cb419c107a02f85bcb99ae
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • 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 21 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 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\kouma_update102f.exe
    "C:\Users\Admin\AppData\Local\Temp\kouma_update102f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:4608
  • C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe"
      2⤵
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4792
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 1952 -prefsLen 27097 -prefMapHandle 1956 -prefMapSize 270279 -ipcHandle 2040 -initialChannelId {99111348-d538-48bd-8c45-287e88500a5b} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
        3⤵
          PID:2812
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2420 -prefsLen 27133 -prefMapHandle 2424 -prefMapSize 270279 -ipcHandle 2432 -initialChannelId {2d885152-7460-419c-a5f8-1171f10fb4aa} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
          3⤵
            PID:1500
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3864 -prefsLen 27274 -prefMapHandle 3868 -prefMapSize 270279 -jsInitHandle 3872 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3880 -initialChannelId {f2488c71-093c-41fd-9cee-8062f039e71a} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
            3⤵
            • Checks processor information in registry
            PID:1856
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 4032 -prefsLen 27274 -prefMapHandle 4036 -prefMapSize 270279 -ipcHandle 4164 -initialChannelId {09382d4d-e6e7-4e6f-98ee-d6ef17a016d9} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
            3⤵
              PID:2824
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2712 -prefsLen 34773 -prefMapHandle 2792 -prefMapSize 270279 -jsInitHandle 2944 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 2768 -initialChannelId {a26ace5c-6a1f-4ba0-9036-152ca6083fa9} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
              3⤵
              • Checks processor information in registry
              PID:3016
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 4936 -prefsLen 34822 -prefMapHandle 4940 -prefMapSize 270279 -ipcHandle 4916 -initialChannelId {43910506-d510-4a00-9edb-ee4b35a050b1} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
              3⤵
              • Checks processor information in registry
              PID:1104
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2752 -prefsLen 32952 -prefMapHandle 5512 -prefMapSize 270279 -jsInitHandle 5528 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5452 -initialChannelId {40822cac-1d59-4992-a588-575852ff8a7f} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
              3⤵
              • Checks processor information in registry
              PID:5944
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5668 -prefsLen 32952 -prefMapHandle 5672 -prefMapSize 270279 -jsInitHandle 5676 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5684 -initialChannelId {86e81abf-73c6-4d6c-8f32-55071ebfbeaa} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
              3⤵
              • Checks processor information in registry
              PID:2640
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5856 -prefsLen 32952 -prefMapHandle 5860 -prefMapSize 270279 -jsInitHandle 5864 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5872 -initialChannelId {bc634426-ce2c-42ab-a42f-405e4223e24c} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
              3⤵
              • Checks processor information in registry
              PID:3272
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 2640 -prefsLen 36541 -prefMapHandle 1636 -prefMapSize 270279 -jsInitHandle 1640 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 1240 -initialChannelId {a5a417b9-98ef-4eab-83ed-937f33ffbf14} -parentPid 4792 -crashReporter "\\.\pipe\gecko-crash-server-pipe.4792" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 10 tab
              3⤵
              • Checks processor information in registry
              PID:4548

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              03100235E7AEBB25C597DD91664A8F544DDFC529

              • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\hfzslj2z.default-release\cache2\entries\03100235E7AEBB25C597DD91664A8F544DDFC529
              • Size 13KB
              • SHA256 a44710a273b54d8d0dc7dd400ab3f627fab6df1d427bd43caef878b6ad1da74e
              • 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.bin

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\db\data.safe.bin
              • Size 29KB
              • SHA256 7b5cdbb7721893ef924017cfb6d8e865a69c0c3af7f7eda1153a5a4204aecd9c
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\db\data.safe.tmp
              • Size 28KB
              • SHA256 46e734b7a7ae63ae95a188a9c90f05b46f8b793944514894addc9bcb7dc25e78
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\db\data.safe.tmp
              • Size 29KB
              • SHA256 5982138dc102e51c8d77f3fc0afc25470d1b324c49bf14c8acbe282004cfad02
              • MD5 SHA1 SHA512 SSDEEP TLSH

              events

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\events\events
              • Size 1KB
              • SHA256 903cc0da05fa697775311c82e14bc161ef178f3b70b5b49fa9dcec0207f1f9c3
              • MD5 SHA1 SHA512 TLSH

              286c016c-088e-4d4b-8699-d5e58079a879

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\pending_pings\286c016c-088e-4d4b-8699-d5e58079a879
              • Size 235B
              • SHA256 d099be20bebc2aad9d929a2e9e0f195573d5e7f15b9d635f1a43ed1a7c993e98
              • MD5 SHA1 SHA512 TLSH

              61dc918b-7596-4ca5-8354-b7f60facee9b

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\pending_pings\61dc918b-7596-4ca5-8354-b7f60facee9b
              • Size 235B
              • SHA256 70050a55ed563d5d3e71604abcd9f7c01121721c9ad2040c7fe239c5ff02c787
              • MD5 SHA1 SHA512 TLSH

              7562a6fa-5d17-4929-86f6-c47b47e080f7

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\pending_pings\7562a6fa-5d17-4929-86f6-c47b47e080f7
              • Size 886B
              • SHA256 c82605e2e2291ae8255c7b1a3f503e414f7e6cd33d26e45b4eced61a4c40cb18
              • MD5 SHA1 SHA512 TLSH

              c6c252db-8fe5-4cbf-8d40-e296e0d0fbaa

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\pending_pings\c6c252db-8fe5-4cbf-8d40-e296e0d0fbaa
              • Size 2KB
              • SHA256 8feba1ee4af9bd157d1427480f3209288feb8b7d40d44db9e2e14c9daef22ca5
              • MD5 SHA1 SHA512 TLSH

              f0e52e41-83fb-4cf6-9d1a-9084acb8fc88

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\datareporting\glean\pending_pings\f0e52e41-83fb-4cf6-9d1a-9084acb8fc88
              • Size 871B
              • SHA256 5e8933355c595fdcb4c957cd755b15ba70c119877aba0ad45bde803a8db107ed
              • MD5 SHA1 SHA512 TLSH

              extensions.json

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\extensions.json
              • Size 16KB
              • SHA256 16a71da187f950932d898cf2b2cb89a9c182443ad05eb276bd3409a1a5b3282a
              • MD5 SHA1 SHA512 SSDEEP TLSH

              gmpopenh264.dll

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.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\hfzslj2z.default-release\gmp-gmpopenh264\2.6.0\gmpopenh264.info
              • Size 116B
              • SHA256 fe7686a6281f0ab519c32c788ce0da0d01640425018dcffcfcb81105757f6fe6
              • MD5 SHA1 SHA512 TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\prefs-1.js
              • Size 7KB
              • SHA256 39e42c14d403d296d91a581ce0b2e0f89871d6fbeb583842fbb0bbdba1190bd1
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\prefs-1.js
              • Size 6KB
              • SHA256 0d1e92e075c873a0b98635609ddfb30b60cf96af2ec41cbb8c0eaad73670430f
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\prefs.js
              • Size 6KB
              • SHA256 b50712be9e3c723be1e74df20aee1f45e4f98c1e943e368461d4548d9a9bf37f
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\prefs.js
              • Size 7KB
              • SHA256 60d98a02edc075806cabc07a28e5f4b12f755404e751a20d1e467bf0bdf14c4b
              • MD5 SHA1 SHA512 SSDEEP TLSH

              recovery.baklz4

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hfzslj2z.default-release\sessionstore-backups\recovery.baklz4
              • Size 1KB
              • SHA256 ef5e6ba0e63021f8959d4fa11d2214dde0ea9101d77e5487edab1d7d87e6ad39
              • MD5 SHA1 SHA512 TLSH