jigsaw | e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51

Resubmissions

06-03-2021 22:16

210306-flkmay1p1a 10

12-02-2021 09:25

210212-1dqmyv511e 10

Analysis

max time kernel
13s
max time network
111s
platform
windows10_x64
resource
win10v20201028
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

pid	Process
2732	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-1-5-21-1985363256-3005190890-1182679451-1000\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 2 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 2732	796	Compito matematica.pdf.exe	75
PID 796 wrote to memory of 2732	796	Compito matematica.pdf.exe	75

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:796
- 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:2732

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

memory/796-3-0x0000000002380000-0x0000000002382000-memory.dmp

Filesize
8KB

Download
memory/796-2-0x00007FF99FCC0000-0x00007FF9A0660000-memory.dmp

Filesize
9.6MB

Download
memory/2732-7-0x00007FF99FCC0000-0x00007FF9A0660000-memory.dmp

Filesize
9.6MB

Download
memory/2732-8-0x00000000024E0000-0x00000000024E2000-memory.dmp

Filesize
8KB

Download