jigsaw | bda65b6470b131bdcdb811a8c95e4498c15641dd97b9af9e3dd65ff82ac1a69a

General

Target

Cats.exe
Size

187KB
MD5

d3be36fa40f8ead25681fab7a9a0af12
SHA1

7a4fd7bccee34bb435126e8ab600277c8e1e9440
SHA256

79193fb1b7ab2698ddd617aa24fa64c08235851a78245d066e6fde02b73856ca
SHA512

c50fbc039a0e15cdac8823174297ebc35772fa40f4a56d89847b5f982db7075d5918f622efb9b3b3b8aa76159fcc68febcb8d3c2bb52040beb351a141afb0dc0

Score

10^/10

jigsaw persistence ransomware spyware stealer

Malware Config

Signatures

Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
ransomware jigsaw
Executes dropped EXE 1 IoCs

Processes:

Chrome32.exe

pid process

652 Chrome32.exe

pid	process
652	Chrome32.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Chrome32.exe

description	ioc	process
File created	C:\Users\Admin\Pictures\ConvertExit.raw.cat	Chrome32.exe
File created	C:\Users\Admin\Pictures\DismountResume.png.cat	Chrome32.exe
File created	C:\Users\Admin\Pictures\RenamePing.png.cat	Chrome32.exe
File created	C:\Users\Admin\Pictures\StepCompress.tif.cat	Chrome32.exe
File created	C:\Users\Admin\Pictures\UndoSplit.tif.cat	Chrome32.exe
File created	C:\Users\Admin\Pictures\UpdateMerge.raw.cat	Chrome32.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Cats.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe"	Cats.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

Cats.exe

description ioc process

File opened for modification C:\Windows\assembly\Desktop.ini Cats.exe
File created C:\Windows\assembly\Desktop.ini Cats.exe

description	ioc	process
File opened for modification	C:\Windows\assembly\Desktop.ini	Cats.exe
File created	C:\Windows\assembly\Desktop.ini	Cats.exe

Drops file in Program Files directory 64 IoCs

Processes:

Chrome32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\upsell.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\js\nls\ru-ru\ui-strings.js.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\7656_32x32x32.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.16112.11601.0_x64__8wekyb3d8bbwe\Assets\contrast-white\SmallLogo.scale-100_contrast-white.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Themes\Beach\mask\13c.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_5.1611.10393.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\SecondaryTiles\TrafficHub\contrast-white\WideTile.scale-125.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\images\rhp_world_icon_2x.png.cat	Chrome32.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\images\example_icons.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.10252.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppPackageAppList.scale-125.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.ZuneVideo_10.16112.11601.0_neutral_resources.scale-200_8wekyb3d8bbwe\Assets\contrast-black\AppList.scale-200_contrast-black.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\ar_16x11.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\SecondaryTiles\Collections\contrast-black\LargeTile.scale-100_contrast-black.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sign-services-auth\js\nls\hu-hu\ui-strings.js.cat	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\images\themes\dark\dd_arrow_small2x.png.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml	Chrome32.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols\symbase.xml	Chrome32.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\SearchEmail.png	Chrome32.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\scan-files\images\themeless\Playstore\th_get.svg	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Wallet_1.0.16328.0_x64__8wekyb3d8bbwe\images\WalletSquare44x44Logo.targetsize-24_altform-unplated.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\contrast-black\HxA-Generic-Light.scale-150.png	Chrome32.exe
File created	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\OsfInstallerConfigOnLogon.xml.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\AppTiles\WeatherIcons\30x30\166.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\ug_16x11.png	Chrome32.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\lib\locale\org-openide-util-lookup_zh_CN.jar	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\HxMailLargeTile.scale-200.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-white\OneNoteWideTile.scale-400.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_x64__8wekyb3d8bbwe\Assets\LiveTiles\Traffic.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\ky_16x11.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\eu-es\ui-strings.js.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\HowToPlay\FreeCell\Goal_2.jpg	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-black\OneNoteNotebookMedTile.scale-200.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-files\images\icons_ie8.gif.cat	Chrome32.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\org-netbeans-modules-options-api.jar	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Messaging_3.26.24002.0_x64__8wekyb3d8bbwe\Assets\starttile.sad.scale-200.png	Chrome32.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\visualvm\modules\com-sun-tools-visualvm-tools.jar	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\is_16x11.png	Chrome32.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ar.txt	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\5311_24x24x32.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\js\nls\ui-strings.js.cat	Chrome32.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\uss-search\js\nls\he-il\ui-strings.js	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-black\OneNoteSectionGroupLargeTile.scale-400.png	Chrome32.exe
File created	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.mbeanbrowser_5.5.0.165303.jar.cat	Chrome32.exe
File opened for modification	C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\FrameworkList.xml	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\js\nls\fr-fr\ui-strings.js.cat	Chrome32.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-sendopts_ja.jar	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1702.312.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.People_10.1.10531.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\contrast-black\PeopleAppStoreLogo.scale-100.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\gn_16x11.png	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\sign-in.png.cat	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\nb-no\ui-strings.js.cat	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\back-arrow-hover.svg.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.10252.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\AppPackageStoreLogo.scale-100.png	Chrome32.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\ClientVolumeLicense_eula.txt.cat	Chrome32.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-white_scale-80.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Themes\Western\western_1h.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\AppTiles\WeatherIcons\30x30\20.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_x64__8wekyb3d8bbwe\Assets\SecondaryTiles\Collections\contrast-black\LargeTile.scale-200_contrast-black.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1612.10312.0_x64__8wekyb3d8bbwe\Assets\InsiderHubAppList.targetsize-256_altform-unplated.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\contrast-white\HxA-Generic-Light.scale-250.png	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_1.1702.28017.0_x64__8wekyb3d8bbwe\Assets\Videos\Help\SmartSelect.mp4	Chrome32.exe
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\s_gridview_selected-hover.svg.cat	Chrome32.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\task-handler\js\nls\da-dk\ui-strings.js	Chrome32.exe
File created	C:\Program Files\Java\jdk1.8.0_66\jre\lib\ext\jaccess.jar.cat	Chrome32.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_x64__8wekyb3d8bbwe\Assets\SecondaryTiles\Work\contrast-white\MedTile.scale-200.png	Chrome32.exe

Drops file in Windows directory 3 IoCs

Processes:

Cats.exe

description	ioc	process
File opened for modification	C:\Windows\assembly	Cats.exe
File created	C:\Windows\assembly\Desktop.ini	Cats.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	Cats.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Cats.exe

description pid process target process

PID 1308 wrote to memory of 652 1308 Cats.exe Chrome32.exe
PID 1308 wrote to memory of 652 1308 Cats.exe Chrome32.exe

description	pid	process	target process
PID 1308 wrote to memory of 652	1308	Cats.exe	Chrome32.exe
PID 1308 wrote to memory of 652	1308	Cats.exe	Chrome32.exe

C:\Users\Admin\AppData\Local\Temp\Cats.exe
"C:\Users\Admin\AppData\Local\Temp\Cats.exe"
1⤵
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1308

C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe
"C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe" C:\Users\Admin\AppData\Local\Temp\Cats.exe
2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Drops file in Program Files directory
PID:652

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe
MD5
d3be36fa40f8ead25681fab7a9a0af12

SHA1
7a4fd7bccee34bb435126e8ab600277c8e1e9440

SHA256
79193fb1b7ab2698ddd617aa24fa64c08235851a78245d066e6fde02b73856ca

SHA512
c50fbc039a0e15cdac8823174297ebc35772fa40f4a56d89847b5f982db7075d5918f622efb9b3b3b8aa76159fcc68febcb8d3c2bb52040beb351a141afb0dc0

Download Submit
C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe
MD5
d3be36fa40f8ead25681fab7a9a0af12

SHA1
7a4fd7bccee34bb435126e8ab600277c8e1e9440

SHA256
79193fb1b7ab2698ddd617aa24fa64c08235851a78245d066e6fde02b73856ca

SHA512
c50fbc039a0e15cdac8823174297ebc35772fa40f4a56d89847b5f982db7075d5918f622efb9b3b3b8aa76159fcc68febcb8d3c2bb52040beb351a141afb0dc0

Download Submit
memory/652-4-0x0000000000000000-mapping.dmp

Download
memory/652-7-0x00007FF8DA490000-0x00007FF8DAE30000-memory.dmp

Filesize
9.6MB

Download
memory/652-8-0x0000000003240000-0x0000000003242000-memory.dmp

Filesize
8KB

Download
memory/652-10-0x0000000003249000-0x000000000324A000-memory.dmp

Filesize
4KB

Download
memory/652-9-0x0000000003247000-0x0000000003249000-memory.dmp

Filesize
8KB

Download
memory/652-11-0x000000000324A000-0x000000000324F000-memory.dmp

Filesize
20KB

Download
memory/1308-2-0x00007FF8DA490000-0x00007FF8DAE30000-memory.dmp

Filesize
9.6MB

Download
memory/1308-3-0x0000000002F10000-0x0000000002F12000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads