Analysis
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max time kernel
54s -
max time network
34s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
03-08-2024 17:32
Static task
static1
Behavioral task
behavioral1
Sample
rBlbqI2.exe
Resource
win10v2004-20240802-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 (466) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
rBlbqI2.exedescription ioc Process Key value queried \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation rBlbqI2.exe -
Executes dropped EXE 1 IoCs
Processes:
drpbx.exepid Process 1180 drpbx.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rBlbqI2.exedescription ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\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 opened for modification C:\Windows\assembly\Desktop.ini rBlbqI2.exe File created 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\7-Zip\Lang\is.txt drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001F-0409-1000-0000000FF1CE.xml.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\OneNoteSectionGroupLargeTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\manifests\BuiltinClassNotebook.xml drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\mk.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2019.19071.12548.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-60_altform-colorize.png drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\Integration\C2RManifest.Proof.Culture.msi.16.en-us.xml drpbx.exe File created C:\Program Files\Microsoft Office\root\rsod\proof.en-us.msi.16.en-us.boot.tree.dat.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.22742.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-16.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MixedReality.Portal_2000.19081.1301.0_x64__8wekyb3d8bbwe\Assets\MixedRealityPortalAppList.targetsize-256_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.targetsize-30_altform-unplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\PublishSwitch.docx drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.contrast-black_targetsize-24.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.targetsize-30_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\Assets\ScreenSketchSquare44x44Logo.targetsize-72_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\ScreenSketchAppService\ReadMe.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_10.1906.1972.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.targetsize-72_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_neutral_~_8wekyb3d8bbwe\AppxMetadata\AppxBundleManifest.xml drpbx.exe File opened for modification C:\Program Files\Java\jdk-1.8\lib\packager.jar drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\Assets\tinytile.targetsize-256_altform-unplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\Assets\ScreenSketchSquare44x44Logo.targetsize-40_altform-unplated_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-32_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\InsiderHubAppList.scale-100_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.22681.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-20.png drpbx.exe File opened for modification C:\Program Files\Windows Media Player\Media Renderer\DMR_120.jpg drpbx.exe File opened for modification C:\Program Files\Microsoft Office\root\rsod\officemui.msi.16.en-us.boot.tree.dat drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.YourPhone_2019.430.2026.0_neutral_~_8wekyb3d8bbwe\AppxMetadata\AppxBundleManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\Assets\tinytile.targetsize-48_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\OneNotePageSmallTile.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxMailAppList.targetsize-20.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_3.6.73.0_x64__8wekyb3d8bbwe\Assets\StoreLogo.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_10.1906.1972.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.contrast-white_targetsize-30.png drpbx.exe File created C:\Program Files\7-Zip\Lang\uk.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\Assets\SplashWideTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\TimerMedTile.contrast-black_scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\HoloAssets\HoloLens_HandTracking.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.NET.Native.Runtime.1.7_1.7.25531.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\Assets\InsiderHubAppList.targetsize-80.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\Assets\InsiderHubWideTile.scale-200_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.22681.0_x64__8wekyb3d8bbwe\Assets\StoreLogo.scale-200.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-64.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_10.1906.1972.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.targetsize-96_altform-unplated.png drpbx.exe File created C:\Program Files\7-Zip\Lang\ug.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\Assets\ScreenSketchSquare44x44Logo.targetsize-24_altform-lightunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\Assets\ScreenSketchSquare44x44Logo.targetsize-48_altform-unplated_contrast-black_devicefamily-colorfulunplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\OutlookMailWideTile.scale-400.png drpbx.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipskor.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\OneNoteAppList.targetsize-20_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\EmptyCalendarSearch-Dark.scale-125.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxMailAppList.targetsize-72.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\Doughboy.scale-100.png drpbx.exe File opened for modification C:\Program Files\UnblockSet.xml drpbx.exe File created C:\Program Files\7-Zip\Lang\ca.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_x64__8wekyb3d8bbwe\Assets\GetStartedSmallTile.scale-100_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\images\OneNoteAppList.targetsize-16_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\bg2_thumb.png drpbx.exe File created C:\Program Files\Java\jdk-1.8\README.html.zemblax drpbx.exe File created C:\Program Files\7-Zip\Lang\ms.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_neutral_split.scale-200_8wekyb3d8bbwe\Assets\GetStartedSmallTile.scale-200_contrast-white.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-64_altform-unplated.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\Assets\InsiderHubAppList.targetsize-256_altform-unplated_contrast-black.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxGamingOverlay_2.34.28001.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\GameBar_SmallTile.scale-100.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxSpeechToTextOverlay_1.17.29001.0_x64__8wekyb3d8bbwe\Assets\GamesXboxHubStoreLogo.scale-200.png drpbx.exe File opened for modification C:\Program Files\Microsoft Office\AppXManifest.xml 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 5020 rBlbqI2.exe Token: SeDebugPrivilege 1180 drpbx.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
rBlbqI2.exedescription pid Process procid_target PID 5020 wrote to memory of 1180 5020 rBlbqI2.exe 85 PID 5020 wrote to memory of 1180 5020 rBlbqI2.exe 85 PID 5020 wrote to memory of 1180 5020 rBlbqI2.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"1⤵
- Checks computer location settings
- 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:5020 -
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:1180
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
291KB
MD52fec9bf50de5395f799b23a1099b10d6
SHA16000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
SHA256df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
SHA5125f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8