Analysis
- user interaction
yes - max time kernel
898s - max time network
889s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
21/02/2026, 01:31
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
Ransomware.Jigsaw.zip
Resource
win11-20260130-en
0 signatures
900 seconds
Behavioral task
behavioral2
Sample
jigsaw.exe
Resource
win11-20260130-en
10 signatures
900 seconds
General
- Target jigsaw.exe
- Size 283KB
- Sample260221-bxjynsb16d
- SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
- MD5 2773e3dc59472296cb0024ba7715a64e
- SHA1 27d99fbca067f478bb91cdbcb92f13a828b00859
- SHA512 6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262
- SSDEEP 6144:7fukPLPvucHiQQQ4uuy9ApZbZWxcZt+kTfMLJTOAZiYSXjjeqXus:7fu5cCT7yYlWi8kTfMLJTOAZiYSXjyqX
- TLSH T110549D9C366076EFC867D476DEA81CA4FA6078BB832B8207901715EDA90D997CF141F3
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
Malware Config
Signatures
- Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
- Jigsaw family
- Renames multiple (1689) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Executes dropped EXE 2 IoCs
pid Process 5048 drpbx.exe 3140 firefox.exe - Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-600123060-2148212387-2211176695-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" jigsaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-600123060-2148212387-2211176695-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" firefox.exe - ConfuserEx .NET packer 1 IoCs
Detects ConfuserEx .NET packer.
resource yara_rule behavioral2/files/0x001900000002b4ae-12.dat ConfuserEx - Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-36_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.Todos_0.33.33351.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\SplashScreen.scale-125_altform-colorful_theme-light.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-36_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_4.0.2.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\Icons\StickyNotesStoreLogo.scale-100_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxMailSplashLogo.scale-400.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.YourPhone_0.19051.7.0_x64__8wekyb3d8bbwe\Assets\AppTiles\AppIcon.targetsize-32.png drpbx.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\requests\status.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingNews_1.0.6.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\NewsAppList.targetsize-80_altform-unplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsMaps_1.0.22.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\MapsWideTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-64_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-80_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.2012.21.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.targetsize-32_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\EmptyCalendarSearch-Dark.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingNews_1.0.6.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\NewsAppList.targetsize-72_altform-unplated_contrast-black.png drpbx.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_reminders_18.svg.fun drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\PaintAppList.targetsize-24_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\Doughboy.scale-300.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-40_altform-unplated_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\SnipSketchAppList.targetsize-16_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-60_altform-lightunplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsFeedbackHub_1.2103.1172.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\FeedbackHubStoreLogo.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-72_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.2103.1172.0_x64__8wekyb3d8bbwe\Assets\contrast-white\FeedbackHubAppList.targetsize-24_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_12104.1001.1.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\AppTiles\contrast-white\StoreAppList.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.YourPhone_0.19051.7.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppTiles\contrast-white\SplashScreen.scale-125_contrast-white.png drpbx.exe File opened for modification C:\Program Files\Windows Media Player\Media Renderer\avtransport.xml firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCamera_2020.503.58.0_x64__8wekyb3d8bbwe\AppxManifest.xml firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-256.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\PlaylistMediumTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\contrast-white\StoreLogo.scale-100_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxMailLargeTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\contrast-black\SmallLogo.scale-200_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_1.0.22.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppTiles\contrast-black\MapsAppList.scale-125_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_2.2106.2807.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\contrast-white\PaintAppList.targetsize-96.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-40_altform-lightunplated_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingNews_1.0.6.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\NewsAppList.targetsize-24_altform-unplated_contrast-white.png drpbx.exe File created C:\Program Files\7-Zip\Lang\eu.txt.fun firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Todos_0.33.33351.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\SplashScreen.scale-100_altform-colorful_theme-light.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxSpeechToTextOverlay_1.17.29001.0_x64__8wekyb3d8bbwe\Assets\GamesXboxHubMedTile.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\OutlookMailSmallTile.scale-400.png drpbx.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.MicrosoftOfficeHub_18.2104.12721.0_neutral_split.scale-125_8wekyb3d8bbwe\Images\Square71x71Logo.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\contrast-white\PaintAppList.targetsize-24_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\AppCS\Assets\EmptyAlbumList.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.BingNews_1.0.6.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppTiles\contrast-black\NewsLargeTile.scale-125_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_2021.226.1915.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-80.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.contrast-black_targetsize-40.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.People_10.1909.12456.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\PeopleWideTile.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.2008.32311.0_x64__8wekyb3d8bbwe\Assets\GetHelpAppList.targetsize-20_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-black_scale-140.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1909.12456.0_x64__8wekyb3d8bbwe\Assets\contrast-white\PeopleAppList.targetsize-256.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsNotepad_10.2102.13.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\contrast-black\NotepadAppList.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingNews_1.0.6.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\NewsAppList.targetsize-60_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.2103.1172.0_x64__8wekyb3d8bbwe\Assets\contrast-white\FeedbackHubAppList.targetsize-256_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.PowerAutomateDesktop_1.0.65.0_x64__8wekyb3d8bbwe\Images\PowerAutomateWide310x150Logo.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\SplashScreen.scale-100_altform-colorful.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-80_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.Paint_10.2104.17.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\contrast-black\PaintLargeTile.scale-125.png drpbx.exe File opened for modification C:\Program Files\VideoLAN\VLC\README.txt firefox.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\PaintAppList.targetsize-80.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.2012.21.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.targetsize-16_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.BingNews_1.0.6.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppTiles\contrast-black\NewsAppList.scale-125_contrast-black.png drpbx.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 3828 wrote to memory of 5048 3828 jigsaw.exe 79
Processes
-
C:\Users\Admin\AppData\Local\Temp\jigsaw.exe"C:\Users\Admin\AppData\Local\Temp\jigsaw.exe"1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3828 -
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\jigsaw.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
PID:5048
-
-
C:\Users\Admin\AppData\Roaming\Frfx\firefox.exeC:\Users\Admin\AppData\Roaming\Frfx\firefox.exe1⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Program Files directory
PID:3140
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\LanguageNames2\DisplayLanguageNames.en_US_POSIX.txt.fun
- Size 32KB
- SHA256 a193ee2673e0ba5ebc5ea6e65665b8a28bd7611f06d2b0174ec2076e22d94356
- MD5 829165ca0fd145de3c2c8051b321734f
- SHA1 f5cc3af85ab27c3ea2c2f7cbb8295b28a76a459e
- SHA512 7d380cda12b342a770def9d4e9c078c97874f3a30cd9f531355e3744a8fef2308f79878ffeb12ce26953325cb6a17bc7e54237dfdc2ee72b140ec295676adbcb
- SSDEEP 768:G0/UcQ5N99TO/VAWPngk6pGemIpytzO2VnXoE6Yiif2U8tzVdiSl:cjTONA4ngknHUUyQXoE5N2U8t5v
- TLSH T131E2F13169EE435456F3C78B5CF49328AB62F7D0F76AA7A30F9A18620DF342150D1A64
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\invalid32x32.gif.fun
- Size 160B
- SHA256 98b6c2ddfefc628d03ceaef9d69688674a6bc32eb707f9ed86bc8c75675c4513
- MD5 580ee0344b7da2786da6a433a1e84893
- SHA1 60f8c4dd5457e9834f5402cb326b1a2d3ca0ba7e
- SHA512 356d2cdea3321e894b5b46ad1ea24c0e3c8be8e3c454b5bd300b7340cbb454e71fc89ca09ea0785b373b483e67c2f6f6bb408e489b0de4ff82d5ed69a75613ba
- TLSH T15FC08C6A014B9E0F0B8A99A600301646A72AD831C151B007E67A1E9BA6AA6666220006
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
- Size 283KB
- SHA256 3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
- MD5 2773e3dc59472296cb0024ba7715a64e
- SHA1 27d99fbca067f478bb91cdbcb92f13a828b00859
- SHA512 6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262
- SSDEEP 6144:7fukPLPvucHiQQQ4uuy9ApZbZWxcZt+kTfMLJTOAZiYSXjjeqXus:7fu5cCT7yYlWi8kTfMLJTOAZiYSXjyqX
- TLSH T110549D9C366076EFC867D476DEA81CA4FA6078BB832B8207901715EDA90D997CF141F3
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Packages\Microsoft.AccountsControl_cw5n1h2txyewy\Settings\settings.dat.fun
- Size 8KB
- SHA256 36537e56d60910ab6aa548e64ca4adafdcabde9d60739013993e12ba061dfd65
- MD5 f22599af9343cac74a6c5412104d748c
- SHA1 e2ac4c57fa38f9d99f3d38c2f6582b4334331df5
- SHA512 5c8afc025e1d8342d93b7842dc7ef22eca61085857a80a08ba9b3f156ee3b814606bb32bc244bd525a7913e7915bdf3a86771d39577f4a1176ade04dc381c6d4
- SSDEEP 192:FSgNbwp27vLa0nMdhWNBPh0X4f4ht6VfJHYwiP8bIpu6Ev0KrDj:FnNbwp2/HnMdhWN1h0XG4hix4wmFpu6g
- TLSH T10F029E5D52CA6AB63C3B8FB69378A11E87F234CB332445CE41AA263CA3D5195D4148BA
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\BroadcastMsg_1769750943.txt.fun
- Size 16B
- SHA256 619e246fc0ac11320ff9e322a979948d949494b0c18217f4d794e1b398818880
- MD5 8ebcc5ca5ac09a09376801ecdd6f3792
- SHA1 81187142b138e0245d5d0bc511f7c46c30df3e14
- SHA512 cec50bfc6ad2f57f16da99459f40f2d424c6d5691685fa1053284f46c8c8c8a975d7bcb1f3521c4f3fbdc310cf4714e29404aa23be6021e2e267c97b090dc650
- MD5 SHA1 SHA512