jigsaw | df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763

Resubmissions

09-10-2023 22:49

231009-2rysragh81 10

01-05-2020 14:11

200501-pez84yzjvx 10

Analysis

max time kernel
128s
max time network
97s
platform
windows10_x64
resource
win10v200430
submitted
01-05-2020 14:11

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Report Analysis Logs

General

Target

rBlbqI2.exe
Size

291KB
MD5

2fec9bf50de5395f799b23a1099b10d6
SHA1

6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e
SHA256

df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
SHA512

5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8

Score

10^/10

persistence ransomware jigsaw

Malware Config

Signatures

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	rBlbqI2.exe
File created	C:\Windows\assembly\Desktop.ini	rBlbqI2.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	rBlbqI2.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	rBlbqI2.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	rBlbqI2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1356	rBlbqI2.exe
Token: SeDebugPrivilege	1828	drpbx.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	68
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	68
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	68

Executes dropped EXE 1 IoCs

pid	Process
1828	drpbx.exe

Adds Run entry 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-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe"	rBlbqI2.exe

Jigsaw
Ransomware family first created in 2016. Named based on wallpaper set after infection.
ransomware jigsaw

C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
"C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"
1⤵
- Drops file in Windows directory
- Drops desktop.ini file(s)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- Adds Run entry to start application
PID:1356
- C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
  "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  PID:1828

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1356-0-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/1356-1-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/1828-5-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download