jigsaw | e398c99bd0f61a4590594dc912e4d4ad23c306df6bd00274e2756d1a28f3ef80

Analysis

max time kernel
159s
max time network
46s
platform
windows7_x64
resource
win7-20220331-en
submitted
08-04-2022 01:39

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General

Target

37fa8fa315d60727ebce5fafa56690b8.exe
Size

240KB
MD5

37fa8fa315d60727ebce5fafa56690b8
SHA1

599c28e16fda50ab1377e900678084ae28557090
SHA256

e398c99bd0f61a4590594dc912e4d4ad23c306df6bd00274e2756d1a28f3ef80
SHA512

cc900fb64eececdd030be5d6b79ef4213f128cae0f4314e77ced24df573d54a68350c2bcd3c5f448e4c640d336ef4888bc2b9a5a6fca1ba39668df4b43c50b09

Score

10^/10

jigsaw persistence ransomware

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

pid	Process
1220	drpbx.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\DisableWait.tif.fun	drpbx.exe
File created	C:\Users\Admin\Pictures\ShowSwitch.raw.fun	drpbx.exe
File created	C:\Users\Admin\Pictures\UseMove.raw.fun	drpbx.exe
File created	C:\Users\Admin\Pictures\BackupExport.tif.fun	drpbx.exe
File created	C:\Users\Admin\Pictures\ConvertToReceive.png.fun	drpbx.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe"	37fa8fa315d60727ebce5fafa56690b8.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\CloseInitialize.mpeg.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ko.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\mr.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\th.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\uk.txt.fun	drpbx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.Office.Interop.InfoPath.SemiTrust.xml	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\io.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\mng2.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\nn.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\sr-spc.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\uk.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ast.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ms.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\th.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\id.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\pt-br.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\tt.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\ConnectionManager.xml	drpbx.exe
File opened for modification	C:\Program Files\Windows NT\TableTextService\TableTextServiceSimplifiedZhengMa.txt	drpbx.exe
File opened for modification	C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_client.xml	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\an.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\hy.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\pt.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Common Files\Services\verisign.bmp	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\uz.txt	drpbx.exe
File opened for modification	C:\Program Files (x86)\Windows NT\TableTextService\TableTextServiceArray.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\af.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\kab.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\lt.txt.fun	drpbx.exe
File created	C:\Program Files\VideoLAN\VLC\COPYING.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\tt.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\uz.txt.fun	drpbx.exe
File created	C:\Program Files\Java\jre7\THIRDPARTYLICENSEREADME-JAVAFX.txt.fun	drpbx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.Office.BusinessApplications.RuntimeUi.xml	drpbx.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\Media Renderer\connectionmanager_dmr.xml	drpbx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.BusinessData.xml	drpbx.exe
File opened for modification	C:\Program Files\Mozilla Firefox\firefox.VisualElementsManifest.xml	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\cy.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\eo.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\lij.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\vi.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_bw32.jpg	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\kaa.txt	drpbx.exe
File opened for modification	C:\Program Files\Java\jre7\README.txt	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Media Renderer\DMR_120.jpg	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Media Renderer\DMR_48.png	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_bw120.jpg	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color32.jpg	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color120.jpg	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color48.jpg	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\an.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\cs.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\hr.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\is.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\pl.txt	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Media Renderer\DMR_48.jpg	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ky.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\mk.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\si.txt	drpbx.exe
File created	C:\Program Files\Java\jre7\THIRDPARTYLICENSEREADME.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\zh-cn.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color120.png	drpbx.exe
File created	C:\Program Files\FormatConnect.mp3.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ar.txt.fun	drpbx.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 3 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 1220	812	37fa8fa315d60727ebce5fafa56690b8.exe	28
PID 812 wrote to memory of 1220	812	37fa8fa315d60727ebce5fafa56690b8.exe	28
PID 812 wrote to memory of 1220	812	37fa8fa315d60727ebce5fafa56690b8.exe	28

C:\Users\Admin\AppData\Local\Temp\37fa8fa315d60727ebce5fafa56690b8.exe
"C:\Users\Admin\AppData\Local\Temp\37fa8fa315d60727ebce5fafa56690b8.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:812
- C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
  "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\37fa8fa315d60727ebce5fafa56690b8.exe
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Drops file in Program Files directory
  PID:1220

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe

Filesize
240KB

MD5
37fa8fa315d60727ebce5fafa56690b8

SHA1
599c28e16fda50ab1377e900678084ae28557090

SHA256
e398c99bd0f61a4590594dc912e4d4ad23c306df6bd00274e2756d1a28f3ef80

SHA512
cc900fb64eececdd030be5d6b79ef4213f128cae0f4314e77ced24df573d54a68350c2bcd3c5f448e4c640d336ef4888bc2b9a5a6fca1ba39668df4b43c50b09

Download Submit
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe

Filesize
240KB

MD5
37fa8fa315d60727ebce5fafa56690b8

SHA1
599c28e16fda50ab1377e900678084ae28557090

SHA256
e398c99bd0f61a4590594dc912e4d4ad23c306df6bd00274e2756d1a28f3ef80

SHA512
cc900fb64eececdd030be5d6b79ef4213f128cae0f4314e77ced24df573d54a68350c2bcd3c5f448e4c640d336ef4888bc2b9a5a6fca1ba39668df4b43c50b09

Download Submit
memory/812-54-0x0000000001FA0000-0x0000000001FA2000-memory.dmp

Filesize
8KB

Download
memory/812-55-0x000007FEF3090000-0x000007FEF4126000-memory.dmp

Filesize
16.6MB

Download
memory/1220-59-0x000007FEEE1E0000-0x000007FEEF276000-memory.dmp

Filesize
16.6MB

Download
memory/1220-60-0x0000000000B40000-0x0000000000B42000-memory.dmp

Filesize
8KB

Download