Malware Analysis Report

2024-10-18 23:53

Sample ID 230927-vb39zadg59
Target Jigsaw2-b.exe
SHA256 053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa
Tags
upx jigsaw persistence ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa

Threat Level: Known bad

The file Jigsaw2-b.exe was found to be: Known bad.

Malicious Activity Summary

upx jigsaw persistence ransomware

Jigsaw Ransomware

Checks computer location settings

Executes dropped EXE

UPX packed file

Adds Run key to start application

Drops desktop.ini file(s)

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-27 16:49

Signatures

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-27 16:49

Reported

2023-09-27 16:50

Platform

win10v2004-20230915-en

Max time kernel

29s

Max time network

33s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe"

Signatures

Jigsaw Ransomware

ransomware jigsaw

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A

Drops desktop.ini file(s)

Description Indicator Process Target
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\assembly C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe

"C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe"

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

"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Jigsaw2-b.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 203.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 54.120.234.20.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp

Files

memory/860-0-0x0000000000400000-0x0000000000454000-memory.dmp

memory/860-1-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/860-2-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/860-3-0x0000000000660000-0x0000000000670000-memory.dmp

memory/860-4-0x0000000000660000-0x0000000000670000-memory.dmp

memory/860-7-0x0000000000660000-0x0000000000670000-memory.dmp

memory/860-8-0x0000000000400000-0x0000000000454000-memory.dmp

memory/860-9-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-10-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-12-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-14-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-16-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-18-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-20-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-22-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-24-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-26-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-28-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-30-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-32-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-34-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-36-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-38-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-40-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-42-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-44-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-46-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-48-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-50-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-52-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-54-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-56-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-58-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-60-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-62-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-64-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-66-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-68-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-70-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-72-0x0000000005180000-0x00000000051B4000-memory.dmp

memory/860-167-0x0000000005240000-0x0000000005241000-memory.dmp

memory/860-171-0x0000000074D60000-0x0000000075311000-memory.dmp

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

MD5 33862bca1fe73d44277e9ad4f0aa81e1
SHA1 e900bf9dc2ad2b18e362c8d42ae8e8ce74fb3ff1
SHA256 053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa
SHA512 08c0ef71dcab39f772abf17b2c714bc89fe2add6fa61f734ea04c05770ad93a68e5fd9caf73d740c3c17dce1ebb0563b0bd82b20fc6a7e508a778bccbbf8384c

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

MD5 33862bca1fe73d44277e9ad4f0aa81e1
SHA1 e900bf9dc2ad2b18e362c8d42ae8e8ce74fb3ff1
SHA256 053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa
SHA512 08c0ef71dcab39f772abf17b2c714bc89fe2add6fa61f734ea04c05770ad93a68e5fd9caf73d740c3c17dce1ebb0563b0bd82b20fc6a7e508a778bccbbf8384c

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

MD5 33862bca1fe73d44277e9ad4f0aa81e1
SHA1 e900bf9dc2ad2b18e362c8d42ae8e8ce74fb3ff1
SHA256 053cec40ef1b8c148c4c1f798509e8b33e0f86f81555307b65e9fdffd670b9fa
SHA512 08c0ef71dcab39f772abf17b2c714bc89fe2add6fa61f734ea04c05770ad93a68e5fd9caf73d740c3c17dce1ebb0563b0bd82b20fc6a7e508a778bccbbf8384c

memory/860-183-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/4704-184-0x0000000000400000-0x0000000000454000-memory.dmp

memory/860-186-0x0000000000400000-0x0000000000454000-memory.dmp

memory/4704-187-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/860-191-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/4704-189-0x0000000002030000-0x0000000002040000-memory.dmp

memory/4704-193-0x0000000002030000-0x0000000002040000-memory.dmp

memory/4704-196-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/4704-350-0x0000000004F70000-0x0000000004F71000-memory.dmp

memory/4704-351-0x0000000002030000-0x0000000002040000-memory.dmp

memory/4704-352-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/4704-353-0x0000000002030000-0x0000000002040000-memory.dmp

memory/4704-354-0x0000000002030000-0x0000000002040000-memory.dmp

memory/4704-356-0x0000000074D60000-0x0000000075311000-memory.dmp