jigsaw | 3cdad5d046d056559562601efd1f2e0eb14285303abbb43f148b76070f498534

Analysis

max time kernel
30s
max time network
16s
platform
windows7_x64
resource
win7-20250207-ja
resource tags

arch:x64arch:x86image:win7-20250207-jalocale:ja-jpos:windows7-x64systemwindows
submitted
09/03/2025, 00:49

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General

Target

Trojan.Ransom.Jigsaw.exe
Size

283KB
MD5

2773e3dc59472296cb0024ba7715a64e
SHA1

27d99fbca067f478bb91cdbcb92f13a828b00859
SHA256

3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
SHA512

6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262
SSDEEP

6144:7fukPLPvucHiQQQ4uuy9ApZbZWxcZt+kTfMLJTOAZiYSXjjeqXus:7fu5cCT7yYlWi8kTfMLJTOAZiYSXjyqX

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
Jigsaw family
jigsaw
Renames multiple (219) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Executes dropped EXE 1 IoCs

pid	Process
2972	drpbx.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe"	Trojan.Ransom.Jigsaw.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\7-Zip\Lang\zh-tw.txt	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_bw32.bmp	drpbx.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.BusinessData.xml.fun	drpbx.exe
File created	C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_extended.xml.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\co.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\fi.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\he.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\it.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\va.txt.fun	drpbx.exe
File created	C:\Program Files\Java\jre7\THIRDPARTYLICENSEREADME-JAVAFX.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\Mso Example Setup File A.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\io.txt	drpbx.exe
File opened for modification	C:\Program Files\Internet Explorer\en-US\eula.rtf	drpbx.exe
File opened for modification	C:\Program Files\Windows NT\TableTextService\TableTextServiceSimplifiedZhengMa.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ext.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\Filters.xml	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 (x86)\Microsoft Office\Office14\Microsoft.Office.Interop.InfoPath.Xml.xml	drpbx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\THIRDPARTYLICENSEREADME.txt	drpbx.exe
File created	C:\Program Files\Java\jre7\THIRDPARTYLICENSEREADME.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\fa.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\fur.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ga.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\lij.txt	drpbx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\THIRDPARTYLICENSEREADME-JAVAFX.txt	drpbx.exe
File created	C:\Program Files\OpenLimit.xlsx.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ro.txt.fun	drpbx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\SketchPadTestSchema.xml	drpbx.exe
File opened for modification	C:\Program Files (x86)\Windows NT\TableTextService\TableTextServiceArray.txt	drpbx.exe
File opened for modification	C:\Program Files\Java\jre7\THIRDPARTYLICENSEREADME-JAVAFX.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\mng.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\mr.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\nb.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\si.txt.fun	drpbx.exe
File created	C:\Program Files\VideoLAN\VLC\COPYING.txt.fun	drpbx.exe
File created	C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_client.xml.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\gl.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\he.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\uz.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Media Renderer\RenderingControl.xml	drpbx.exe
File created	C:\Program Files\7-Zip\History.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\eo.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\fy.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DissolveAnother.png	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\fy.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ga.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\mn.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\ta.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\uz-cyrl.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\va.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\License.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\io.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\it.txt	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\kab.txt.fun	drpbx.exe
File created	C:\Program Files\Java\jdk1.7.0_80\THIRDPARTYLICENSEREADME.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\bn.txt.fun	drpbx.exe
File created	C:\Program Files\7-Zip\Lang\da.txt.fun	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\si.txt	drpbx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\sr-spl.txt	drpbx.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color120.jpg	drpbx.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.Office.Interop.InfoPath.SemiTrust.xml.fun	drpbx.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\Microsoft.Office.Interop.InfoPath.Xml.xml.fun	drpbx.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2972	1984	Trojan.Ransom.Jigsaw.exe	31
PID 1984 wrote to memory of 2972	1984	Trojan.Ransom.Jigsaw.exe	31
PID 1984 wrote to memory of 2972	1984	Trojan.Ransom.Jigsaw.exe	31

C:\Users\Admin\AppData\Local\Temp\Trojan.Ransom.Jigsaw.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan.Ransom.Jigsaw.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
  "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Trojan.Ransom.Jigsaw.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  PID:2972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
283KB

MD5
2773e3dc59472296cb0024ba7715a64e

SHA1
27d99fbca067f478bb91cdbcb92f13a828b00859

SHA256
3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7

SHA512
6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262

Download Submit
memory/1984-0-0x000007FEF606E000-0x000007FEF606F000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x00000000022B0000-0x00000000022E8000-memory.dmp

Filesize
224KB

Download
memory/1984-2-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/1984-3-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/1984-13-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/2972-10-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/2972-11-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/2972-12-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/2972-14-0x000007FEF5DB0000-0x000007FEF674D000-memory.dmp

Filesize
9.6MB

Download
memory/2972-15-0x000000001B000000-0x000000001B058000-memory.dmp

Filesize
352KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads