Malware Analysis Report

2025-08-11 06:08

Sample ID 240527-w4depaed55
Target ysoserial-all.jar
SHA256 2c9bddd6a1a4ec66c1078ea97dacb61eb66d1c41aec7b6d21e3c72214ce170f1
Tags
discovery
score
7/10

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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

2c9bddd6a1a4ec66c1078ea97dacb61eb66d1c41aec7b6d21e3c72214ce170f1

Threat Level: Shows suspicious behavior

The file ysoserial-all.jar was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery

Modifies file permissions

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-27 18:28

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-27 18:28

Reported

2024-05-27 18:32

Platform

win7-20240508-en

Max time kernel

124s

Max time network

123s

Command Line

java -jar C:\Users\Admin\AppData\Local\Temp\ysoserial-all.jar

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A

Processes

C:\Windows\system32\java.exe

java -jar C:\Users\Admin\AppData\Local\Temp\ysoserial-all.jar

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x500

Network

N/A

Files

memory/1644-2-0x00000000024B0000-0x0000000002720000-memory.dmp

memory/1644-10-0x0000000000140000-0x0000000000141000-memory.dmp

memory/1644-11-0x0000000000140000-0x0000000000141000-memory.dmp

memory/1644-16-0x0000000000140000-0x0000000000141000-memory.dmp

memory/1644-17-0x00000000024B0000-0x0000000002720000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-27 18:28

Reported

2024-05-27 18:32

Platform

win10v2004-20240426-en

Max time kernel

91s

Max time network

93s

Command Line

java -jar C:\Users\Admin\AppData\Local\Temp\ysoserial-all.jar

Signatures

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\icacls.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1076 wrote to memory of 4064 N/A C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe C:\Windows\system32\icacls.exe
PID 1076 wrote to memory of 4064 N/A C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe C:\Windows\system32\icacls.exe

Processes

C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe

java -jar C:\Users\Admin\AppData\Local\Temp\ysoserial-all.jar

C:\Windows\system32\icacls.exe

C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 101.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/1076-2-0x00000138E0760000-0x00000138E09D0000-memory.dmp

C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp

MD5 665b0a1011c80d5a03e065b44a2a6a25
SHA1 d2060341bc17dd44a80c53eb3853c8e08322c184
SHA256 8738c0eba06ce12beee69a49ecc343b315d821a64dc833a8dc8d9e2f8be4f44e
SHA512 fba636d059e4ecc985a10e98e8c41c650dbf2bc24530d14d65fe976466af6d42074beeddd8f7d04654e5a3b717aa20202d2f47248d99246f149c233fea62c558

memory/1076-12-0x00000138DEF10000-0x00000138DEF11000-memory.dmp

memory/1076-17-0x00000138DEF10000-0x00000138DEF11000-memory.dmp

memory/1076-18-0x00000138E0760000-0x00000138E09D0000-memory.dmp