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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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

Processes:

rBlbqI2.exe

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

Processes:

rBlbqI2.exe

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

Processes:

rBlbqI2.exedrpbx.exe

description pid process

Token: SeDebugPrivilege 1356 rBlbqI2.exe
Token: SeDebugPrivilege 1828 drpbx.exe

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

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

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rBlbqI2.exe

description	pid	process	target process
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	drpbx.exe
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	drpbx.exe
PID 1356 wrote to memory of 1828	1356	rBlbqI2.exe	drpbx.exe

Executes dropped EXE 1 IoCs

Processes:

drpbx.exe

pid process

1828 drpbx.exe

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

Processes:

rBlbqI2.exe

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 Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

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

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

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

Filesize
4KB

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

Filesize
4KB

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

Filesize
4KB

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