Analysis
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max time kernel
142s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28-05-2024 04:57
Static task
static1
Behavioral task
behavioral1
Sample
a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe
Resource
win10v2004-20240226-en
General
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Target
a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe
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Size
126KB
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MD5
84134031ba193cf5cc6da995ce298cd2
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SHA1
e955ce1fa9b31084c822cc641f49a28859b82371
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SHA256
a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e
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SHA512
cab52649cb176c160efccb21b8a3c3f16311ba30e25c86e1c6878a84fe4a60c9d1073f2df673c05823145fb27fb0879703bd8c8daaeac13ff310e39d3c5f3c6f
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SSDEEP
3072:BNEp/EAS/mhYugM7vewJ8oJno9Xxh+tuk0oFaWJxT6XyzJ53Lnhdgddz5:nEpBduutSwJ8oJn8X+turkJ/6Xy57hS1
Malware Config
Extracted
C:\Program Files\!nissenvelten!HOW_TO_RESTORE.log
rook
Signatures
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Rook
Rook is a ransomware which copies from NightSky ransomware.
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Renames multiple (6930) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops file in Program Files directory 64 IoCs
Processes:
a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exedescription ioc process File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\TypeSupport\Unicode\Mappings\Mac\SYMBOL.TXT.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\viewer\nls\ja-jp\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial4-pl.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\TRANSLAT\FREN\MSB1FREN.ITS.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\css\main.css.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\Locales\eu.pak.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7EN.LEX.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Java\jre-1.8\lib\security\policy\unlimited\local_policy.jar.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\7-Zip\Lang\fi.txt.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_5.1906.1972.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\SecondaryTiles\Place\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\identity_proxy\win11\identity_helper.Sparse.Internal.msix.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\WordR_OEM_Perp-pl.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\VideoLAN\VLC\locale\my\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalDemoR_BypassTrial180-ul-oob.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\da_get.svg.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Redshift\lib\OpenSSL64.DllA\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\CONCRETE\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioStdVL_MAK-pl.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\invalid32x32.gif.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\DataModel\Cartridges\trdtv2r41.xsl.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\VideoLAN\VLC\locale\as_IN\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.ZuneMusic_10.19071.19011.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\contrast-white\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\ca-es\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\ResiliencyLinks\Locales\ms.pak.DATA.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\ResiliencyLinks\Trust Protection Lists\Mu\Fingerprinting.DATA.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\add-comment.png.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\root\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\js\nls\hu-hu\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0000-1000-0000000FF1CE.xml.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioStdVL_KMS_Client-ppd.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeCore\122.0.2365.52\Locales\fr.pak.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_x64__8wekyb3d8bbwe\Assets\Fonts\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\nls\en-gb\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\MondoR_O17EnterpriseVL_Bypass30-ul-oob.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL111.XML.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroApp\ENU\EPDF_RHP.aapp.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeCore\122.0.2365.52\msedgewebview2.exe.sig.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\eu-es\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\ru-ru\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectProO365R_SubTrial-pl.xrm-ms.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\mobile_equalizer.html.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\js\nls\cs-cz\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\sv-se\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\GRAPH_F_COL.HXK.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Filters\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\app\dev\nls\fr-ma\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\zh-tw\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\generic-rhp-app\js\plugins\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\nls\ro-ro\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-white\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\hr-hr\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\apple-touch-icon-114x114-precomposed.png.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\ResiliencyLinks\Trust Protection Lists\Mu\CompatExceptions.DATA.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files-select\css\main.css.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\images\close.svg.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\jscripts\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\Client2019_eula.txt.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\plugins\rhp\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\fr-fr\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Microsoft\EdgeCore\122.0.2365.52\Locales\en-GB.pak.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\microsoft.system.package.metadata\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\!nissenvelten!HOW_TO_RESTORE.log a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\en-il\ui-strings.js.nissenvelten-sjj3hhut a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe"C:\Users\Admin\AppData\Local\Temp\a9238bb7a0c565768ab6478114704dce98c161e82d9f8b59b5989f7a5d1d189e.exe"1⤵
- Drops file in Program Files directory
PID:1616
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1044 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:81⤵PID:2376
Network
MITRE ATT&CK Matrix
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Program Files (x86)\Microsoft\EdgeWebView\Application\122.0.2365.52\WidevineCdm\_platform_specific\win_x64\widevinecdm.dll.sig.nissenvelten-sjj3hhut
Filesize2KB
MD5e600823c746e6925b136cc3cdda01fd5
SHA19b62121e2ca40792452628b6fa33eff90d6d928a
SHA256fbb1d85b52fd4a30f7f172220bffa1be2b4ee46a40f95cf99fd92184673e6ce6
SHA512dbc1bb315de1e015eed371c3e79d1327da82dd477080b2ae11441ec0afc3b2c3136594da6b7dd7e9c5807ab84eabe7eb9cded4a67c6cbd1f18a0e563c80d2e65
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Filesize
1KB
MD51ac13e1c2b35dfaf377ceb55e61e5309
SHA1e53185eee04a0578483054e507d639be2635b4d7
SHA25672e9a50a52585a25c5529b846cf586946694e46a912a97b526e4a7067ab1d7e6
SHA512fa702569f13d82d24e78cba21397f0d53281c0a93db7a484bb974f4cb965da23dd4691c7061de6bfd54e40d5d32faa2e8b8af52968191b91f9164f5c7d459fa6