jigsaw | e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51

Resubmissions

06-03-2021 22:16

210306-flkmay1p1a 10

12-02-2021 09:25

210212-1dqmyv511e 10

Analysis

max time kernel
4s
max time network
13s
platform
windows7_x64
resource
win7v20201028
submitted
12-02-2021 09:25

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General

Target

Compito matematica.pdf.exe
Size

606KB
MD5

4e890ba5a4f6fd63727c0005daa654dd
SHA1

e9ade30c93942c3f5928522552dd01eb25a9e9db
SHA256

e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51
SHA512

177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477

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

Processes:

drpbx.exe

pid process

2024 drpbx.exe

pid	process
2024	drpbx.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Compito matematica.pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe"	Compito matematica.pdf.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

Processes:

Compito matematica.pdf.exe

description	pid	process	target process
PID 784 wrote to memory of 2024	784	Compito matematica.pdf.exe	drpbx.exe
PID 784 wrote to memory of 2024	784	Compito matematica.pdf.exe	drpbx.exe
PID 784 wrote to memory of 2024	784	Compito matematica.pdf.exe	drpbx.exe

C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:784

C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Compito?matematica.pdf.exe
2⤵
- Executes dropped EXE
PID:2024

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
MD5
4e890ba5a4f6fd63727c0005daa654dd

SHA1
e9ade30c93942c3f5928522552dd01eb25a9e9db

SHA256
e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51

SHA512
177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477

Download Submit
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
MD5
4e890ba5a4f6fd63727c0005daa654dd

SHA1
e9ade30c93942c3f5928522552dd01eb25a9e9db

SHA256
e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51

SHA512
177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477

Download Submit
memory/784-2-0x000007FEF58F0000-0x000007FEF628D000-memory.dmp

Filesize
9.6MB

Download
memory/784-3-0x000007FEF58F0000-0x000007FEF628D000-memory.dmp

Filesize
9.6MB

Download
memory/784-4-0x0000000000880000-0x0000000000882000-memory.dmp

Filesize
8KB

Download
memory/2024-5-0x0000000000000000-mapping.dmp

Download
memory/2024-8-0x000007FEF58F0000-0x000007FEF628D000-memory.dmp

Filesize
9.6MB

Download
memory/2024-9-0x000007FEF58F0000-0x000007FEF628D000-memory.dmp

Filesize
9.6MB

Download
memory/2024-10-0x0000000000B30000-0x0000000000B32000-memory.dmp

Filesize
8KB

Download