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240803-dmj7sswcne 10Analysis
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max time kernel
1567s -
max time network
1539s -
platform
windows11-21h2_x64 -
resource
win11-20240802-en -
resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system -
submitted
03-08-2024 03:14
Static task
static1
Behavioral task
behavioral1
Sample
rBlbqI2.exe
Resource
win11-20240802-en
General
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Target
rBlbqI2.exe
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Size
291KB
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MD5
2fec9bf50de5395f799b23a1099b10d6
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SHA1
6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
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SHA256
df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
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SHA512
5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8
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SSDEEP
6144:pdSK04ETTZ+4TBpvjLCnVlBpevKBauJirVuD05VSKJ:poL4EnU4T/vjLeVlayRihuA5D
Malware Config
Signatures
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Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
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Renames multiple (1530) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Executes dropped EXE 1 IoCs
Processes:
drpbx.exepid Process 3236 drpbx.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rBlbqI2.exedescription ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-242286936-336880687-2152680090-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" rBlbqI2.exe -
Drops desktop.ini file(s) 2 IoCs
Processes:
rBlbqI2.exedescription ioc Process File created C:\Windows\assembly\Desktop.ini rBlbqI2.exe File opened for modification C:\Windows\assembly\Desktop.ini rBlbqI2.exe -
Drops file in Program Files directory 64 IoCs
Processes:
drpbx.exedescription ioc Process File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_1.0.38.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.targetsize-40.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1909.12456.0_x64__8wekyb3d8bbwe\Assets\contrast-black\PeopleAppList.targetsize-72.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\contrast-white\SnipSketchAppList.targetsize-96.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxA-Generic-Dark.scale-400.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\contrast-black\StoreLogo.scale-100_contrast-black.png drpbx.exe File created C:\Program Files\7-Zip\Lang\ast.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.2012.21.0_x64__8wekyb3d8bbwe\Assets\Standard.targetsize-16_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\FetchingMail.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Images\SplashScreen.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-24.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.Windows.Photos_21.21030.25003.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\PhotosMedTile.contrast-white_scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_4.0.2.0_x64__8wekyb3d8bbwe\Assets\Icons\StickyNotesWideTile.scale-200_altform-colorful_theme-light.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.42251.0_x64__8wekyb3d8bbwe\Assets\AppPackageAppList.targetsize-96_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-96_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\TXP_TicketedEvent.png drpbx.exe File created C:\Program Files\Google\Chrome\Application\123.0.6312.123\VisualElements\Logo.png.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\PhotosSplashScreen.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarLogoExtensions.scale-16.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\contrast-black\SnipSketchAppList.targetsize-64_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\ExchangeLargeTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxCalendarMediumTile.scale-400.png drpbx.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Tracker\form_responses.gif.zemblax drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Delete.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCamera_2020.503.58.0_x64__8wekyb3d8bbwe\Assets\contrast-black\CameraAppList.targetsize-24_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-white\ExchangeBadge.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-80_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Images\StoreLogo.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.PowerAutomateDesktop_1.0.65.0_x64__8wekyb3d8bbwe\Images\contrast-black\PowerAutomateSplashScreen.scale-400.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\FetchingMail.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsCamera_2020.503.58.0_neutral_split.scale-200_8wekyb3d8bbwe\Assets\contrast-black\CameraAppList.scale-200.png drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\nn.txt drpbx.exe File opened for modification C:\Program Files (x86)\Windows NT\TableTextService\TableTextServiceArray.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.contrast-black_scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\YahooPromoTile.scale-100.png drpbx.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Click on 'Change' to select default PDF handler.pdf drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_4.0.2.0_x64__8wekyb3d8bbwe\Assets\Icons\StickyNotesAppList.targetsize-48.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\SnippingTool\Assets\Square44x44Logo.targetsize-256.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_1.0.6.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\AppTiles\contrast-black\WeatherLargeTile.scale-100_contrast-black.png drpbx.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\lib\security\policy\limited\US_export_policy.jar drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_4.6.3102.0_x64__8wekyb3d8bbwe\Win10\MicrosoftSolitaireAppList.targetsize-16_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.2103.1172.0_x64__8wekyb3d8bbwe\Assets\FeedbackHubAppList.targetsize-30_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-3102-0000-1000-0000000FF1CE.xml drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.scale-140.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.Getstarted_10.2.41172.0_neutral_split.scale-200_8wekyb3d8bbwe\Assets\TipsBadgeLogo.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.2103.1172.0_x64__8wekyb3d8bbwe\Assets\Retail\guest.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GamingApp_2105.900.24.0_x64__8wekyb3d8bbwe\Assets\Xbox_UnplatedLargeTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.40831.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-72_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsLargeTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.PowerAutomateDesktop_1.0.65.0_neutral_split.scale-100_8wekyb3d8bbwe\Images\contrast-white\PowerAutomateSquare310x310Logo.scale-100.png drpbx.exe File created C:\Program Files\Microsoft Office\ThinAppXManifest.xml.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxA-GoogleCloudCacheMini.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_4.0.2.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\Icons\StickyNotesLargeTile.scale-125_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.PowerAutomateDesktop_1.0.65.0_x64__8wekyb3d8bbwe\Images\contrast-black\PowerAutomateWide310x150Logo.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.2103.1172.0_x64__8wekyb3d8bbwe\Assets\contrast-black\FeedbackHubAppList.targetsize-40.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-96.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_4.6.3102.0_neutral_split.scale-200_8wekyb3d8bbwe\Win10\contrast-white\MicrosoftSolitaireMedTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\contrast-white\PaintAppList.targetsize-256_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.PowerAutomateDesktop_1.0.65.0_x64__8wekyb3d8bbwe\Images\contrast-white\PowerAutomateSquare70x70Logo.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxA-Yahoo-Dark.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_12104.1001.1.0_x64__8wekyb3d8bbwe\Resources\RetailDemo\data\en-us\1.jpg drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-48_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_2.2106.2807.0_x64__8wekyb3d8bbwe\Assets\Store\SplashScreen.scale-125.altform-colorful.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-black\HxMailAppList.targetsize-60_altform-lightunplated.png drpbx.exe -
Drops file in Windows directory 3 IoCs
Processes:
rBlbqI2.exedescription ioc Process File opened for modification C:\Windows\assembly\Desktop.ini rBlbqI2.exe File opened for modification C:\Windows\assembly rBlbqI2.exe File created C:\Windows\assembly\Desktop.ini rBlbqI2.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
rBlbqI2.exedrpbx.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rBlbqI2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language drpbx.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
rBlbqI2.exedrpbx.exedescription pid Process Token: SeDebugPrivilege 2700 rBlbqI2.exe Token: SeDebugPrivilege 3236 drpbx.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rBlbqI2.exedescription pid Process procid_target PID 2700 wrote to memory of 3236 2700 rBlbqI2.exe 80 PID 2700 wrote to memory of 3236 2700 rBlbqI2.exe 80 PID 2700 wrote to memory of 3236 2700 rBlbqI2.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"1⤵
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700 -
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3236
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\LanguageNames2\DisplayLanguageNames.en_US_POSIX.txt.zemblax
Filesize32KB
MD5aec7bd7c96948d97d13c7df53988e89c
SHA17b906b88009e7509324ae92dc8a32ae4fb38626c
SHA25615fcb7c77cf60f287e9c81ec8053a9cdd1aa8bc0413734e8a1499a9de635c6d0
SHA51227d12f825c16d1d5349f53a23d57f71eb8d4534a1ae4af2c4eead9cda09a4440dadc518a8887a3ea818494cb6319fc82ab8147cdb85958e9b344400b7d6b2803
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Filesize
160B
MD5000e8c41d4a15fb34d0be0dbb56e3778
SHA100c4eae64ee6239d7c65d819c6ce1ac329224f8c
SHA2568bdfa6a5b7de345cf0d4fe0e9c17d8b0e9db26d58b05b1b2ebbb3a05a068ff28
SHA512775d832eb8ab73e4a93789917dca69edb6c91fbb426e02acf7c6e213ffb4575776187209d1c471fbf57c4621ea3c23d9850f6dfc2770d62c17de9d66710800af
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Filesize
291KB
MD52fec9bf50de5395f799b23a1099b10d6
SHA16000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
SHA256df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
SHA5125f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8
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C:\Users\Admin\AppData\Local\Packages\Microsoft.AccountsControl_cw5n1h2txyewy\Settings\settings.dat.zemblax
Filesize8KB
MD5420960c4b17842a24bbf117222c60e47
SHA14e2f5bc3a3fe7da4ea60dfaae851b1b88e48751d
SHA256e94c37d7dc8dd954bfee8e340abc882bc361baf0d3771ed442ed625a3bcb0174
SHA512b42f16f6fca9b66d49a2ad7c80e56c51e04d023a4ae50e984dbd267e204682ecbb929fefb5c7ee67775597773b08b6bd39416f13b87f1782cf8c5d553ecd7ce5
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Filesize
16B
MD5cfdae8214d34112dbee6587664059558
SHA1f649f45d08c46572a9a50476478ddaef7e964353
SHA25633088cb514406f31e3d96a92c03294121ee9f24e176f7062625c2b36bee7a325
SHA512c260f2c223ecbf233051ac1d6a1548ad188a2777085e9d43b02da41b291ff258e4c506f99636150847aa24918c7bbb703652fef2fe55b3f50f85b5bd8dd5f6e3