Analysis
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max time kernel
132s -
max time network
132s -
platform
windows10-2004_x64 -
resource
win10v2004-20230221-en -
resource tags
arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system -
submitted
28-03-2023 06:55
Static task
static1
Behavioral task
behavioral1
Sample
Crypter.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
Crypter.exe
Resource
win10v2004-20230221-en
General
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Target
Crypter.exe
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Size
129KB
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MD5
9c62af504ce79cc4c0bbcc2612f3c4db
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SHA1
37c01dc0342c161569e9d434246dc42962c00860
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SHA256
43c9c228baf00bc4614fdeb578eb84ad2232cef6c2820046b0b9fec502be573f
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SHA512
3572b9dde32844ba873de6c994dcf42e71bc217806390d6cf9d767d4c837266592087837aa70991604e3bd283a27a6e11d1d48177996213e8575326f86f839f3
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SSDEEP
3072:qLbLpVIYbQf91G3im/2Ef07JysgNv8Ofr4pt6Y46ab6koEMQBfjS3f2vYeBgrOi4:qTpVXvxyq6ko0BSveYprzOu3ScuT06
Malware Config
Signatures
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies extensions of user files 1 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
Crypter.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\UseWrite.tiff Crypter.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
Crypter.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation Crypter.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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Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
Crypter.exedescription ioc process File opened (read-only) \??\D: Crypter.exe -
Drops file in Program Files directory 64 IoCs
Processes:
Crypter.exedescription ioc process File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\BREEZE\BREEZE.INF.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\compare.png Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\css\tool-selector.css Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-time-l1-1-0.dll Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL026.XML Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\add-account\js\nls\zh-tw\ui-strings.js Crypter.exe File opened for modification C:\Program Files\Mozilla Firefox\browser\features\screenshots@mozilla.org.xpi Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\Assets\Square150x150Logo.scale-200.png Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.22753.0_x64__8wekyb3d8bbwe\Assets\contrast-black\LargeTile.scale-125_contrast-black.png Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.DOC.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Trial-pl.xrm-ms.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-16.png Crypter.exe File created C:\Program Files\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\#FILE ENCRYPTED.txt Crypter.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_5.1906.1972.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\SecondaryTiles\Work\contrast-black\SmallTile.scale-125.png Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Retail-ul-phn.xrm-ms.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\contrast-white\HxMailAppList.targetsize-30.png Crypter.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\deploy\messages_pt_BR.properties Crypter.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\resources.jar.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\ro.pak Crypter.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxMailBadge.scale-150.png Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL105.XML Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\it-it\ui-strings.js Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\send-for-sign\js\nls\ca-es\ui-strings.js Crypter.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.de-de.dll Crypter.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\images\HxA-Yahoo-Light.scale-400.png Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-white_scale-140.png Crypter.exe File created C:\Program Files\VideoLAN\VLC\locale\ks_IN\#FILE ENCRYPTED.txt Crypter.exe File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\ResiliencyLinks\Locales\sl.pak.DATA.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-masterfs-nio2_zh_CN.jar Crypter.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-sampler_ja.jar.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_5.1906.1972.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\SecondaryTiles\Home\contrast-black\MedTile.scale-125.png Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\MondoR_KMS_Automation-ul-oob.xrm-ms.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File created C:\Program Files\Java\jre1.8.0_66\lib\applet\#FILE ENCRYPTED.txt Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\Assets\contrast-black\AppPackageSplashScreen.scale-150_contrast-black.png Crypter.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\it-it\#FILE ENCRYPTED.txt Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\ScreenSketchWide310x150Logo.scale-125_contrast-white.png Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2019.19071.12548.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-40_altform-colorize.png Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Assets\CalculatorAppList.contrast-white_targetsize-72.png Crypter.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\jre\lib\ext\sunec.jar.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_x64__8wekyb3d8bbwe\Assets\AppTiles\WeatherIcons\30x30\12.png Crypter.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\COPYRIGHT.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Trial-pl.xrm-ms Crypter.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe\Reader\DC\Linguistics\Providers\Plugins2\AdobeHunspellPlugin\SupplementalDictionaries\en_US\Excluded.txt.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\Localized_images\ja-jp\#FILE ENCRYPTED.txt Crypter.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\ast\LC_MESSAGES\vlc.mo.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\MEIPreload\manifest.json Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\Toast.svg.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\playlist\vimeo.luac.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\playlist\youtube.luac Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Send2Fluent.White@3x.png Crypter.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.bg-bg.dll Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\vcruntime140.dll.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\manifests\BuiltinResearcher.xml Crypter.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.22753.0_x64__8wekyb3d8bbwe\Assets\contrast-white\AppList.scale-200_contrast-white.png Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\walk-through\js\nls\root\ui-strings.js.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Windows Media Player\fr-FR\wmlaunch.exe.mui Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial2-ul-oob.xrm-ms Crypter.exe File opened for modification C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Locales\de.pak Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_organize_18.svg Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\nls\pl-pl\ui-strings.js.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\VideoLAN\VLC\skins\winamp2.xml.EMAIL=[antistrees2000@keemail.me]ID=[6A3C5245BE2098C3].BTC Crypter.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\ISO690Nmerical.XSL Crypter.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\home\images\themes\dark\new_icons.png Crypter.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Interacts with shadow copies 2 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exevssadmin.exepid process 224 vssadmin.exe 4876 vssadmin.exe -
Modifies registry class 1 IoCs
Processes:
StartMenuExperienceHost.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings\MuiCache StartMenuExperienceHost.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
Crypter.exepid process 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe 4568 Crypter.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 8 vssvc.exe Token: SeRestorePrivilege 8 vssvc.exe Token: SeAuditPrivilege 8 vssvc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
StartMenuExperienceHost.exepid process 6072 StartMenuExperienceHost.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
Crypter.execmd.execmd.exedescription pid process target process PID 4568 wrote to memory of 4572 4568 Crypter.exe cmd.exe PID 4568 wrote to memory of 4572 4568 Crypter.exe cmd.exe PID 4572 wrote to memory of 224 4572 cmd.exe vssadmin.exe PID 4572 wrote to memory of 224 4572 cmd.exe vssadmin.exe PID 4568 wrote to memory of 3224 4568 Crypter.exe cmd.exe PID 4568 wrote to memory of 3224 4568 Crypter.exe cmd.exe PID 3224 wrote to memory of 4876 3224 cmd.exe vssadmin.exe PID 3224 wrote to memory of 4876 3224 cmd.exe vssadmin.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\Crypter.exe"C:\Users\Admin\AppData\Local\Temp\Crypter.exe"1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service1⤵
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C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\#FILE ENCRYPTED.txt1⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\#FILE ENCRYPTED.txtFilesize
332B
MD594250996214fbc1194e5d00ca0472059
SHA14aa601fd325613df0d1e070cd9b97aaeba31033e
SHA2569dbda2ff049da53281eb3336461d309b8da1de14c11169187dcfc08dcbfe4b7d
SHA5128ff4dfbe8cfd6c7ab86d045827a3fa79303f77e6fa4c9ef1d5000cbf36e9a8b8c397ec2fc98de341305151872e7a50e9184a385fc703907384cb5fdaba57938f
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\~tartUnifiedTileModelCache.tmpFilesize
14KB
MD5d1526c611fbfa91ce5d14239ae65da65
SHA19a0e562796985467c8e64545427f13506a4e7487
SHA256167aa904fbe7aab5885a364596c3f01efca69badbb90ca8c2660ea3e46ec4ae2
SHA51294e5601e35a84ac3d8838ff2ee45c60a2072a5e030fdfbb6e518f731b88b56e0da4b002d34129598d64e8025274aef8a0e44ca82ddb32c8214073def3740105d
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C:\Users\Admin\Desktop\#FILE ENCRYPTED.txtFilesize
332B
MD594250996214fbc1194e5d00ca0472059
SHA14aa601fd325613df0d1e070cd9b97aaeba31033e
SHA2569dbda2ff049da53281eb3336461d309b8da1de14c11169187dcfc08dcbfe4b7d
SHA5128ff4dfbe8cfd6c7ab86d045827a3fa79303f77e6fa4c9ef1d5000cbf36e9a8b8c397ec2fc98de341305151872e7a50e9184a385fc703907384cb5fdaba57938f