jigsaw | 61cd0131cb4bf090c5ee7761566f6f7a778e78b37d220f0506f98632a2663ee8

Target

cats.exe
Size

126KB
MD5

e0d108435c58dc9403588e4dcab68275
SHA1

7a7331423938020550ff3decd2e8b50b3ee5c87a
SHA256

61cd0131cb4bf090c5ee7761566f6f7a778e78b37d220f0506f98632a2663ee8
SHA512

2a5648ced91b75d928b4d71a8580c5bee75a5f27623f8c5071cd23b8cd85eaa8129ddb0aaf0a1fcca05fb1b7868a0fcd9306e9ddf2d3eaaf605c41cc7fde4a9e

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
1500	Chrome32.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"	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

description	pid	Process	procid_target
PID 3812 wrote to memory of 1500	3812	cats.exe	75
PID 3812 wrote to memory of 1500	3812	cats.exe	75

C:\Users\Admin\AppData\Local\Temp\cats.exe
"C:\Users\Admin\AppData\Local\Temp\cats.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3812
- 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
  PID:1500

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/1500-7-0x00007FF98BE80000-0x00007FF98C820000-memory.dmp

Filesize
9.6MB

Download
memory/1500-8-0x0000000002AE0000-0x0000000002AE2000-memory.dmp

Filesize
8KB

Download
memory/3812-3-0x0000000002640000-0x0000000002642000-memory.dmp

Filesize
8KB

Download
memory/3812-2-0x00007FF98BE80000-0x00007FF98C820000-memory.dmp

Filesize
9.6MB

Download

Resubmissions

Analysis

Sharing

General