Analysis
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max time kernel
94s -
max time network
119s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
02-10-2024 09:31
Static task
static1
Behavioral task
behavioral1
Sample
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe
Resource
win10v2004-20240802-en
General
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Target
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe
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Size
906KB
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MD5
6dd8c26f64df37d0c7645b63c9bba51f
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SHA1
9e2d705afad61509a90fd07915d3925aa4a3d997
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SHA256
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a
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SHA512
0eb26db5752c6806f8b6f51eb7f311154c6a0a3907563b4f144fc09159996ebb014432c0ed98090356ff9fcd88d3f360d3d4ddb97d0c77cc631c8d86de3006e7
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SSDEEP
6144:EYdNbzC+2VEOxgtCoW0RlmQzr7cCJPBv7ameMF8DXUQa1xCSjOT:1iuCoW0RlmQzrQCBv76DXfoxCa
Malware Config
Signatures
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Detects Rhysida ransom note 1 IoCs
Processes:
resource yara_rule C:\Program Files\7-Zip\Lang\CriticalBreachDetected.pdf family_rhysida_ransomnote -
Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
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Renames multiple (8290) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
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Drops startup file 1 IoCs
Processes:
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops file in Program Files directory 64 IoCs
Processes:
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exedescription ioc process File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\activity-badge\js\nls\en-il\ui-strings.js.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\reviews\js\nls\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\Dictionaries\en_GB\affDescription.txt.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Common Files\System\msadc\de-DE\msdaprsr.dll.mui.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\POWERPNT_COL.HXT.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL083.XML.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\VideoLAN\VLC\locale\nl\LC_MESSAGES\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\7-Zip\Lang\fi.txt.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Trial-pl.xrm-ms.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1906.1972.0_x64__8wekyb3d8bbwe\Assets\SecondaryTiles\Directions\Home\LTR\contrast-black\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\images\themes\dark\icons.png.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\zh-cn\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Locales\fr-CA.pak.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_Subscription-pl.xrm-ms.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\Windows NT\TableTextService\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\VideoLAN\VLC\plugins\demux\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\Appstore\Download_on_the_App_Store_Badge_cs_135x40.svg.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\WindowsPowerShell\Modules\PowerShellGet\1.0.0.1\it-IT\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.scale-80.png.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\FirstRunLogoSmall.scale-180.png.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\OpenSSL64.DllA\openssl64.dlla.manifest.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\DataModel\Cartridges\sql70.xsl.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\JOURNAL\JOURNAL.INF.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_x64__8wekyb3d8bbwe\fmui\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\js\nls\ja-jp\ui-strings.js.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\pt-BR.pak.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\SkypeForBusinessBasic2019_eula.txt.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\kn\LC_MESSAGES\vlc.mo.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-recent-files\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\unified-share\js\nls\cs-cz\ui-strings.js.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Grace-ppd.xrm-ms.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagement\fr-FR\MSFT_PackageManagement.schema.mfl.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagementSource\en-US\MSFT_PackageManagementSource.schema.mfl.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagementSource\it-IT\MSFT_PackageManagementSource.schema.mfl.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\nls\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\hi_contrast\core_icons_highcontrast_retina.png.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_Subscription-pl.xrm-ms.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\VideoLAN\VLC\lua\meta\reader\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_listview_selected-hover.svg.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\activity-badge\css\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\add-account\js\nls\zh-tw\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\hu_get.svg.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.cpl.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\OUTLFLTR.DAT.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail-ul-oob.xrm-ms.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\fr.pak.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\add-account\images\new_icons_retina.png.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\images\themes\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\nls\en-gb\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\en-us\oregres.dll.mui.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Mozilla Firefox\browser\features\[email protected] a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\js\nls\ko-kr\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\reviews\css\main.css.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Java\jre-1.8\lib\jfr\default.jfc.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files\Java\jre-1.8\lib\calendars.properties.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Locale\en_US\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\app\dev\nls\ar-ae\CriticalBreachDetected.pdf a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\ui-strings.js.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\task-handler\js\plugin.js.rhysida a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe -
System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs
Adversaries may check for Internet connectivity on compromised systems.
Processes:
cmd.execmd.exePING.EXEpid process 6036 cmd.exe 4464 cmd.exe 5552 PING.EXE -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exepid process 2464 a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe 2464 a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.execmd.execmd.exedescription pid process target process PID 2464 wrote to memory of 6036 2464 a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe cmd.exe PID 2464 wrote to memory of 6036 2464 a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe cmd.exe PID 6036 wrote to memory of 4464 6036 cmd.exe cmd.exe PID 6036 wrote to memory of 4464 6036 cmd.exe cmd.exe PID 4464 wrote to memory of 5552 4464 cmd.exe PING.EXE PID 4464 wrote to memory of 5552 4464 cmd.exe PING.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe"C:\Users\Admin\AppData\Local\Temp\a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe"1⤵
- Drops startup file
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2464 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c cmd.exe /c start ping 127.0.0.1 -n 2 > nul && del /f /q "C:\Users\Admin\AppData\Local\Temp\C:\Users\Admin\AppData\Local\Temp\a40b815afce131df6d4bc3f389cb64b742f545481119d3ecb78dda22e546a41a.exe"2⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:6036 -
C:\Windows\system32\cmd.execmd.exe /c start ping 127.0.0.1 -n 23⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:4464 -
C:\Windows\system32\PING.EXEping 127.0.0.1 -n 24⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
PID:5552
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Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
111KB
MD593dc030fb16eb16f5f15afb6ce42b1fc
SHA10ace6ca808c97236dd24470b9b3925416cb55777
SHA2560ba11fb0caa6a8c7b24c5d8dcfb88b2edee9310265f8e4e2c795ec3389c4b225
SHA5121266b09415136ca4ef201527e110f938f50802fa2074796728d7ab0e5868cb1a670f2c2846a46c88d138e83080b7ed1f178e479dd0216bf4c84a31c80d5d078b