mespinoza | c5741701b3866459dd1ffa2477cfd8776713612912693a5897f78aac795d23e9

Resubmissions

28-07-2024 16:38

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07-07-2024 14:07

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07-07-2024 14:07

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13-09-2022 17:54

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Analysis

max time kernel
1689s
max time network
1702s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
13-09-2022 17:54

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Report Analysis Logs

General

Target

RansomwareSamples/Pysa_08_04_2021_500KB.exe
Size

500KB
MD5

d751f54365181f544f908cc9ae3c91c5
SHA1

51cbc9455b7781cf0529f299631e59016fe52e95
SHA256

af99b482eb0b3ff976fa719bf0079da15f62a6c203911655ed93e52ae05c4ac8
SHA512

04497dcac535c18247b13634db35a3a53369719696e700ff2c45637c616f6932ba22ddad2e3925055c92e5922f38c34f09ce8d87106f894a7a586ad0d41e6d33
SSDEEP

12288:oDMUibBYoo+OeO+OeNhBBhhBB7TRU+FR+q1mITXimIscFa:KMUiFTTRU+3+qAILfo

Score

10^/10

mespinoza ransomware spyware stealer

Malware Config

Signatures

Mespinoza Ransomware 2 TTPs
Also known as Pysa. Ransomware-as-a-servoce which first appeared in 2020.
ransomware mespinoza

Query Registry
T1012

Data Encrypted for Impact
T1486

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Pysa_08_04_2021_500KB.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\DebugApprove.tiff => C:\Users\Admin\Pictures\DebugApprove.tiff.pysa	Pysa_08_04_2021_500KB.exe
File renamed	C:\Users\Admin\Pictures\FindEnable.tif => C:\Users\Admin\Pictures\FindEnable.tif.pysa	Pysa_08_04_2021_500KB.exe
File renamed	C:\Users\Admin\Pictures\PingDebug.crw => C:\Users\Admin\Pictures\PingDebug.crw.pysa	Pysa_08_04_2021_500KB.exe
File renamed	C:\Users\Admin\Pictures\ResumeWait.tiff => C:\Users\Admin\Pictures\ResumeWait.tiff.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\DebugApprove.tiff.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\FindEnable.tif.pysa	Pysa_08_04_2021_500KB.exe
File renamed	C:\Users\Admin\Pictures\LockGroup.crw => C:\Users\Admin\Pictures\LockGroup.crw.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\LockGroup.crw.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\PingDebug.crw.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\ResumeWait.tiff.pysa	Pysa_08_04_2021_500KB.exe
File renamed	C:\Users\Admin\Pictures\SaveDismount.tif => C:\Users\Admin\Pictures\SaveDismount.tif.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Users\Admin\Pictures\SaveDismount.tif.pysa	Pysa_08_04_2021_500KB.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Pysa_08_04_2021_500KB.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Pysa_08_04_2021_500KB.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Drops file in Program Files directory 64 IoCs

Processes:

Pysa_08_04_2021_500KB.exe

description	ioc	process
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\aicuc\js\nls\it-it\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Windows Media Player\ja-JP\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\lib\psfont.properties.ja.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.text.nl_ja_4.4.0.v20140623020002.jar.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files\Java\jdk1.8.0_66\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-recent-files\js\nls\de-de\ui-strings.js.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\rna-main.js.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\TypeSupport\Unicode\Mappings\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.common_3.6.200.v20130402-1505.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_gridview-hover.svg.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\combinepdf\js\nls\en-ae\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\eu-es\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.operations_2.4.0.v20131119-0908.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-openide-nodes.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagement\fr-FR\MSFT_PackageManagement.strings.psd1.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\ru-ru\ui-strings.js.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.browser.attach.zh_CN_5.5.0.165303.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.frameworkadmin.equinox.nl_ja_4.4.0.v20140623020002.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Tracker\review_shared.gif.pysa	Pysa_08_04_2021_500KB.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.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\cs_get.svg.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\modules\org-netbeans-modules-profiler-attach.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\http\css\ui-lightness\images\ui-icons_ef8c08_256x240.png.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_reminders_18.svg.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\ko-kr\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files-select\js\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\images\themes\dark\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\lib\management\snmp.acl.template.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.e4.rcp_1.3.100.v20141007-2033\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\playlist\koreus.luac.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\Readme.README	Pysa_08_04_2021_500KB.exe
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.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\sv-se\ui-strings.js.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.ui.intro_3.4.200.v20130326-1254.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\lib\org-openide-modules.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-openide-dialogs_ja.jar.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\iadata\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\he-il\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\7-Zip\Lang\uz.txt.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.updatechecker_1.1.200.v20131119-0908.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.simpleconfigurator.nl_ja_4.4.0.v20140623020002.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\uss-search\js\nls\nl-nl\ui-strings.js.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Windows NT\TableTextService\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\Playstore\ar_get.svg.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\signatures\js\nls\fi-fi\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\sd\icecast.luac.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\plugins\editpdf-tool-view.js.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\js\nls\sl-si\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\activity-badge\js\nls\sl-si\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\pages-app\images\example_icons2x.png.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\db\bin\setEmbeddedCP.bat.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\configuration\config.ini.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\profiler\modules\locale\org-netbeans-modules-profiler-selector-ui_zh_CN.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\lib\fontconfig.bfc.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\http\images\Other-48.png.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\de-de\ui-strings.js.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\js\nls\ja-jp\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\js\nls\da-dk\Readme.README	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\core\locale\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\modules\com-sun-tools-visualvm-jmx.jar.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\lib\deploy.jar.pysa	Pysa_08_04_2021_500KB.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\js\nls\ko-kr\Readme.README	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\DSCResources\MSFT_PackageManagementSource\de-DE\MSFT_PackageManagementSource.schema.mfl.pysa	Pysa_08_04_2021_500KB.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\images\new_icons_retina.png.pysa	Pysa_08_04_2021_500KB.exe

Drops file in Windows directory 1 IoCs

Processes:

Pysa_08_04_2021_500KB.exe

description ioc process

File created C:\Windows\Readme.README Pysa_08_04_2021_500KB.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\Readme.README	Pysa_08_04_2021_500KB.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Pysa_08_04_2021_500KB.exe

description	pid	process	target process
PID 1424 wrote to memory of 3868	1424	Pysa_08_04_2021_500KB.exe	cmd.exe
PID 1424 wrote to memory of 3868	1424	Pysa_08_04_2021_500KB.exe	cmd.exe
PID 1424 wrote to memory of 3868	1424	Pysa_08_04_2021_500KB.exe	cmd.exe

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

Processes:

Pysa_08_04_2021_500KB.exe

description	ioc	process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\legalnoticecaption = 50005900530041000000	Pysa_08_04_2021_500KB.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\legalnoticetext = 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	Pysa_08_04_2021_500KB.exe

C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\Pysa_08_04_2021_500KB.exe
"C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\Pysa_08_04_2021_500KB.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1424
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
  2⤵
  PID:3868

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1486

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\update.bat

Filesize
307B

MD5
500d20a1c66f984df577ead3578baa6e

SHA1
15e4f30890d806ea39c722b7ec3b4ff8c29c3da1

SHA256
57274f42114888d8e6d8c48bd02b4cd2f5dd20bb407aa3472a62568f6fb15dfa

SHA512
a077bd8671b6c03257739c5a2a5685bc57c57f37b9bbca40d021ea2e3c73fb798cbf3a607426ca18f72909f25b01ddd617946b2942578bfbc191d5a8402aa47e

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memory/3868-132-0x0000000000000000-mapping.dmp

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