Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-lkt8zsfhd7
Target 0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5
SHA256 0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5
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

0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5

Threat Level: Known bad

The file 0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5 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

2022-10-20 09:35

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-20 09:35

Reported

2022-10-21 23:45

Platform

win7-20220812-en

Max time kernel

40s

Max time network

47s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.dll,#1

Signatures

Yunsip

trojan banker yunsip

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.dll,#1

Network

N/A

Files

memory/852-54-0x0000000000000000-mapping.dmp

memory/852-55-0x0000000075ED1000-0x0000000075ED3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 09:35

Reported

2022-10-21 23:45

Platform

win10v2004-20220812-en

Max time kernel

166s

Max time network

173s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.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\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0f4883add5ad4dd248834b1c9d9554f6fcfd1c88c3ad987e009b77fa77ba28d5.dll,#1

Network

Country Destination Domain Proto
NL 20.224.151.203:443 tcp
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp
US 20.189.173.13:443 tcp
US 93.184.220.29:80 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
US 72.21.81.240:80 tcp
US 8.8.8.8:53 15.89.54.20.in-addr.arpa udp
US 8.8.8.8:53 f.7.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.0.0.0.0.3.0.1.3.0.6.2.ip6.arpa udp

Files

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