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03/08/2024, 03:16
240803-dse52awejb1003/08/2024, 03:15
240803-dr286swdrd1003/08/2024, 03:15
240803-drxcxs1fnj1003/08/2024, 03:14
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240803-dmj7sswcne10Analysis
- max time kernel
1618s - max time network
1589s - 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, 03:15
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
rBlbqI2.exe
Resource
win11-20240802-en
12 signatures
1800 seconds
General
- Target rBlbqI2.exe
- Size 291KB
- Sample240803-dr286swdrd
- SHA256 df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
- MD5 2fec9bf50de5395f799b23a1099b10d6
- SHA1 6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
- SHA512 5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8
- SSDEEP 6144:pdSK04ETTZ+4TBpvjLCnVlBpevKBauJirVuD05VSKJ:poL4EnU4T/vjLeVlayRihuA5D
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
- Renames multiple (1540) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Executes dropped EXE 1 IoCs
pid Process 2316 drpbx.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2227988167-2813779459-4240799794-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" rBlbqI2.exe - Drops desktop.ini file(s) 2 IoCs
description 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
description ioc Process File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1909.12456.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\PeopleMedTile.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-40_altform-lightunplated_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-32_altform-unplated_contrast-white.png drpbx.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_gridview-hover.svg.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.32731.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-96.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-72_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-72_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\contrast-white\BadgeLogo.scale-150_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.2008.32311.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_4.6.3102.0_x64__8wekyb3d8bbwe\Win10\MicrosoftSolitaireAppList.targetsize-40.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-72_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\OutlookMailBadge.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_1.0.38.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\VoiceRecorderMedTile.scale-125_contrast-black.png drpbx.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\EssentialResume.dotx.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.2012.21.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\CalculatorLargeTile.scale-125_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-white\ExchangeLargeTile.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Generic-Light.scale-400.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsNotepad_10.2102.13.0_x64__8wekyb3d8bbwe\Assets\contrast-white\NotepadAppList.targetsize-96.png drpbx.exe File created C:\Program Files\Java\jdk-1.8\jvisualvm.txt.zemblax drpbx.exe File created C:\Program Files\VideoLAN\VLC\THANKS.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsSplashScreen.scale-100_contrast-black.png drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\pt.txt drpbx.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\hwrenUSlm.dat drpbx.exe File created C:\Program Files\Mozilla Firefox\defaults\pref\channel-prefs.js.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_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.PowerAutomateDesktop_1.0.65.0_x64__8wekyb3d8bbwe\Images\contrast-white\PowerAutomateSquare71x71Logo.scale-125.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.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\contrast-white\Dismiss.scale-64.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsNotepad_10.2102.13.0_x64__8wekyb3d8bbwe\Assets\contrast-white\NotepadAppList.targetsize-80_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsCamera_2020.503.58.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\contrast-white\CameraMedTile.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingNews_1.0.6.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\AppTiles\contrast-white\NewsLargeTile.scale-100_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\Theme_Photo_GreenClovers_Thumbnail.jpg drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.contrast-white_scale-80.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.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\contrast-white\SnipSketchAppList.targetsize-20_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-32_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_1.0.6.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\WeatherAppList.targetsize-20_altform-unplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipssrb.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_1.0.38.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.targetsize-96_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxGamingOverlay_2.50.24002.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\GameBar_MedTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\contrast-white\SnipSketchAppList.targetsize-36.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-16_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_12104.1001.1.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\StoreAppList.targetsize-32.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.2104.12721.0_x64__8wekyb3d8bbwe\Images\FileOneNote32x32.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_11.2104.2.0_x64__8wekyb3d8bbwe\Assets\SnipSketchAppList.targetsize-80_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\OutlookMailBadge.scale-400.png drpbx.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.scale-140.png.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_4.0.2.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\Icons\StickyNotesSmallTile.scale-100_altform-colorful_theme-light.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsMaps_1.0.22.0_x64__8wekyb3d8bbwe\Assets\AppTiles\MapsAppList.targetsize-48_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.32731.0_x64__8wekyb3d8bbwe\Assets\SplashScreen.scale-150.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-16_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.32731.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppList.targetsize-40_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.21012.10511.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\contrast-black\SmallLogo.scale-100_contrast-black.png drpbx.exe File created C:\Program Files\VideoLAN\VLC\lua\http\dialogs\error_window.html.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.YourPhone_0.19051.7.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\AppIcon.targetsize-80_altform-unplated_contrast-black.png drpbx.exe File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\VisualElements\SmallLogo.png drpbx.exe File created C:\Program Files\7-Zip\Lang\va.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxMailAppList.targetsize-48_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\Google\Chrome\Application\123.0.6312.123\VisualElements\SmallLogoDev.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\AlarmsAppList.scale-100_contrast-black.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.WebpImageExtension_1.0.32731.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.targetsize-96_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-256_altform-lightunplated_contrast-white.png drpbx.exe - Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\assembly rBlbqI2.exe File created C:\Windows\assembly\Desktop.ini rBlbqI2.exe File opened for modification C:\Windows\assembly\Desktop.ini rBlbqI2.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language drpbx.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rBlbqI2.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3976 rBlbqI2.exe Token: SeDebugPrivilege 2316 drpbx.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3976 wrote to memory of 2316 3976 rBlbqI2.exe 78 PID 3976 wrote to memory of 2316 3976 rBlbqI2.exe 78 PID 3976 wrote to memory of 2316 3976 rBlbqI2.exe 78
Processes
-
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:3976 -
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:2316
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\LanguageNames2\DisplayLanguageNames.en_US_POSIX.txt.zemblax
- Size 32KB
- SHA256 15fcb7c77cf60f287e9c81ec8053a9cdd1aa8bc0413734e8a1499a9de635c6d0
- MD5 aec7bd7c96948d97d13c7df53988e89c
- SHA1 7b906b88009e7509324ae92dc8a32ae4fb38626c
- SHA512 27d12f825c16d1d5349f53a23d57f71eb8d4534a1ae4af2c4eead9cda09a4440dadc518a8887a3ea818494cb6319fc82ab8147cdb85958e9b344400b7d6b2803
- SSDEEP 768:nF82oqJCnYDoA0bMB4IZ6NDUZYEanwbafhbADJVyZR:jInYDoAqSoDYynGafhuVa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\invalid32x32.gif.zemblax
- Size 160B
- SHA256 8bdfa6a5b7de345cf0d4fe0e9c17d8b0e9db26d58b05b1b2ebbb3a05a068ff28
- MD5 000e8c41d4a15fb34d0be0dbb56e3778
- SHA1 00c4eae64ee6239d7c65d819c6ce1ac329224f8c
- SHA512 775d832eb8ab73e4a93789917dca69edb6c91fbb426e02acf7c6e213ffb4575776187209d1c471fbf57c4621ea3c23d9850f6dfc2770d62c17de9d66710800af
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
- Size 291KB
- SHA256 df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
- MD5 2fec9bf50de5395f799b23a1099b10d6
- SHA1 6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
- SHA512 5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8
- SSDEEP 6144:pdSK04ETTZ+4TBpvjLCnVlBpevKBauJirVuD05VSKJ:poL4EnU4T/vjLeVlayRihuA5D
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Packages\Microsoft.AccountsControl_cw5n1h2txyewy\Settings\settings.dat.zemblax
- Size 8KB
- SHA256 e94c37d7dc8dd954bfee8e340abc882bc361baf0d3771ed442ed625a3bcb0174
- MD5 420960c4b17842a24bbf117222c60e47
- SHA1 4e2f5bc3a3fe7da4ea60dfaae851b1b88e48751d
- SHA512 b42f16f6fca9b66d49a2ad7c80e56c51e04d023a4ae50e984dbd267e204682ecbb929fefb5c7ee67775597773b08b6bd39416f13b87f1782cf8c5d553ecd7ce5
- SSDEEP 192:keqQxRAGZiDunha1lHIBYwn0bDmTqUzsZY98bMeY:kpQHZ08ha1lHIBdLzsCGYeY
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\BroadcastMsg_1722612834.txt.zemblax
- Size 16B
- SHA256 33088cb514406f31e3d96a92c03294121ee9f24e176f7062625c2b36bee7a325
- MD5 cfdae8214d34112dbee6587664059558
- SHA1 f649f45d08c46572a9a50476478ddaef7e964353
- SHA512 c260f2c223ecbf233051ac1d6a1548ad188a2777085e9d43b02da41b291ff258e4c506f99636150847aa24918c7bbb703652fef2fe55b3f50f85b5bd8dd5f6e3
- MD5 SHA1 SHA512