Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-x9k76aceaq
Target 898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d
SHA256 898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d
Tags
yunsip banker trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d

Threat Level: Known bad

The file 898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d 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: behavioral2

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:07

Platform

win10v2004-20220901-en

Max time kernel

91s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3420 wrote to memory of 5024 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3420 wrote to memory of 5024 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3420 wrote to memory of 5024 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\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
NL 104.80.225.205:443 tcp
US 72.21.91.29:80 tcp
GB 51.132.193.104:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp

Files

memory/5024-135-0x0000000000000000-mapping.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:07

Platform

win7-20220901-en

Max time kernel

43s

Max time network

48s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1184 wrote to memory of 2044 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\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\898e8b76627caa38ed1194364ce25266defdb7c1660c2e694ad90cedb68d5d4d.dll,#1

Network

N/A

Files

memory/2044-54-0x0000000000000000-mapping.dmp

memory/2044-55-0x0000000075A11000-0x0000000075A13000-memory.dmp