Analysis
-
max time kernel
118s -
max time network
120s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
10-02-2022 18:26
Static task
static1
Behavioral task
behavioral1
Sample
pys_d751f5436518.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
pys_d751f5436518.exe
Resource
win10v2004-en-20220113
General
-
Target
pys_d751f5436518.exe
-
Size
500KB
-
MD5
d751f54365181f544f908cc9ae3c91c5
-
SHA1
51cbc9455b7781cf0529f299631e59016fe52e95
-
SHA256
af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8
-
SHA512
04497dcac535c18247b13634db35a3a53369719696e700ff2c45637c616f6932ba22ddad2e3925055c92e5922f38c34f09ce8d87106f894a7a586ad0d41e6d33
Malware Config
Signatures
-
Mespinoza Ransomware 2 TTPs
Also known as Pysa. Ransomware-as-a-servoce which first appeared in 2020.
-
Modifies extensions of user files 16 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
pys_d751f5436518.exedescription ioc process File renamed C:\Users\Admin\Pictures\EnterReceive.crw => C:\Users\Admin\Pictures\EnterReceive.crw.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\InitializeMeasure.png => C:\Users\Admin\Pictures\InitializeMeasure.png.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\InitializeMeasure.png.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\MeasureMerge.raw => C:\Users\Admin\Pictures\MeasureMerge.raw.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\MergeUninstall.tif.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\WatchSearch.png.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\CloseOut.tif => C:\Users\Admin\Pictures\CloseOut.tif.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\CloseOut.tif.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\EnterReceive.crw.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\UnblockExport.crw.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\CloseSync.crw => C:\Users\Admin\Pictures\CloseSync.crw.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\CloseSync.crw.pysa pys_d751f5436518.exe File opened for modification C:\Users\Admin\Pictures\MeasureMerge.raw.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\UnblockExport.crw => C:\Users\Admin\Pictures\UnblockExport.crw.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\WatchSearch.png => C:\Users\Admin\Pictures\WatchSearch.png.pysa pys_d751f5436518.exe File renamed C:\Users\Admin\Pictures\MergeUninstall.tif => C:\Users\Admin\Pictures\MergeUninstall.tif.pysa pys_d751f5436518.exe -
Deletes itself 1 IoCs
Processes:
cmd.exepid process 1768 cmd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Drops file in Program Files directory 64 IoCs
Processes:
pys_d751f5436518.exedescription ioc process File opened for modification C:\Program Files\SubmitRestore.midi.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\es-ES\css\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Locales\ar.pak.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jre7\lib\currency.data.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Common Files\microsoft shared\EQUATION\1033\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.ui.zh_CN_5.5.0.165303.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.themes_1.0.1.v20140819-1717\css\e4_classic_win7.css.pysa pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\BREEZE\BREEZE.ELM.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Sidebar\Gadgets\SlideShow.Gadget\ja-JP\css\Readme.README pys_d751f5436518.exe File created C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\p2\org.eclipse.equinox.p2.engine\profileRegistry\JMC.profile\.data\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-openide-loaders_zh_CN.jar.pysa pys_d751f5436518.exe File created C:\Program Files\VideoLAN\VLC\locale\fur\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\ECHO\ECHO.ELM.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\db\lib\derbyLocale_zh_CN.jar.pysa pys_d751f5436518.exe File created C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Etc\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.forms.nl_zh_4.4.0.v20140623020002.jar.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\de-DE\js\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ecf.ssl_1.1.0.v20140827-1444.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\lib\org-openide-util.jar.pysa pys_d751f5436518.exe File created C:\Program Files\VideoLAN\VLC\locale\mk\LC_MESSAGES\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\icudtl.dat.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-core-windows_ja.jar.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Google\Update\Install\{920B63DC-D088-44C4-8453-54E1AD8D662D}\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\deploy\messages_de.properties.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\configuration\org.eclipse.update\platform.xml.pysa pys_d751f5436518.exe File created C:\Program Files\VideoLAN\VLC\locale\gu\Readme.README pys_d751f5436518.exe File created C:\Program Files (x86)\Common Files\microsoft shared\Help\1031\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Goose_Bay.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-modules-autoupdate-cli_zh_CN.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jre7\lib\content-types.properties.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\fr-FR\css\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\win32\bridge\AccessBridgeCalls.c.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\profiler\modules\locale\org-netbeans-modules-profiler_ja.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Europe\Rome.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Mail\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\7-Zip\Lang\ext.txt.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.ui.win32.nl_zh_4.4.0.v20140623020002.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.e4.rcp_1.3.100.v20141007-2033\feature.xml.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\144DPI\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\JOURNAL\THMBNAIL.PNG.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Sidebar\Gadgets\MediaCenter.Gadget\css\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\AcroSign.prc.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\Readme.README pys_d751f5436518.exe File created C:\Program Files\Common Files\System\ja-JP\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-api-progress_zh_CN.jar.pysa pys_d751f5436518.exe File created C:\Program Files\VideoLAN\VLC\lua\meta\art\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Resource\ENUtxt.pdf.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.e4.ui.css.core_0.10.100.v20140424-2042.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.p2.operations.nl_zh_4.4.0.v20140623020002.jar.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\VideoLAN\VLC\locale\bn_IN\LC_MESSAGES\vlc.mo.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Windows Sidebar\Gadgets\Clock.Gadget\de-DE\Readme.README pys_d751f5436518.exe File created C:\Program Files (x86)\Common Files\microsoft shared\Help\1041\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\ACEEXCL.DLL.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Common Files\Adobe\Acrobat\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\LICLUA.EXE.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\7-Zip\Lang\az.txt.pysa pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\MSO.DLL.pysa pys_d751f5436518.exe File created C:\Program Files (x86)\Common Files\System\msadc\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jre7\lib\fonts\LucidaBrightDemiBold.ttf.pysa pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Resource\Font\CourierStd-Bold.otf.pysa pys_d751f5436518.exe File created C:\Program Files\Windows Journal\es-ES\Readme.README pys_d751f5436518.exe File opened for modification C:\Program Files (x86)\Common Files\Adobe AIR\Versions\1.0\template.msi.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\license.html.pysa pys_d751f5436518.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-openide-nodes_zh_CN.jar.pysa pys_d751f5436518.exe -
Drops file in Windows directory 1 IoCs
Processes:
pys_d751f5436518.exedescription ioc process File created C:\Windows\Readme.README pys_d751f5436518.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
pys_d751f5436518.exedescription pid process target process PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe PID 1972 wrote to memory of 1768 1972 pys_d751f5436518.exe cmd.exe -
System policy modification 1 TTPs 2 IoCs
Processes:
pys_d751f5436518.exedescription ioc process Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\legalnoticetext = 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 pys_d751f5436518.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\legalnoticecaption = 50005900530041000000 pys_d751f5436518.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\pys_d751f5436518.exe"C:\Users\Admin\AppData\Local\Temp\pys_d751f5436518.exe"1⤵
- Modifies extensions of user files
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
- System policy modification
-
C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "2⤵
- Deletes itself
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\update.batMD5
85a05d7c95deccd4b7ccc516641f00fe
SHA10b188a926ebb909ad8fd202ea51e5faa27eeba99
SHA2564264caf50de1b6c24044bb5b6d1bff884c72a902f779c509f12578d777aac45d
SHA512a7891dc1e8e2b899f983e82d4bf725476205799946ef2bdaf27670dc3b1b5b25eebc7d16b560c7b3d41664055c5650e11f359592f62a5a84b36ac229f575382b
-
memory/1972-55-0x0000000074B21000-0x0000000074B23000-memory.dmpFilesize
8KB