Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-x9kavsceap
Target 8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404
SHA256 8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404
Tags
yunsip banker trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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
10/10

SHA256

8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404

Threat Level: Known bad

The file 8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404 was found to be: Known bad.

Malicious Activity Summary

yunsip banker trojan

Yunsip

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-10-21 19:33

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:08

Platform

win7-20220812-en

Max time kernel

38s

Max time network

46s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 1620 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

Network

N/A

Files

memory/1620-54-0x0000000000000000-mapping.dmp

memory/1620-55-0x0000000075F51000-0x0000000075F53000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:07

Platform

win10v2004-20220812-en

Max time kernel

157s

Max time network

190s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4208 wrote to memory of 2724 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4208 wrote to memory of 2724 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4208 wrote to memory of 2724 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\8af5966054f9fd334c5cf9cb6963110f48f7e12ba3fdf9c241c8fea25b4c6404.dll,#1

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp
US 20.189.173.13:443 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp

Files

memory/2724-132-0x0000000000000000-mapping.dmp