Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-z62f3sfabk
Target 5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f
SHA256 5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f
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

5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f

Threat Level: Known bad

The file 5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f 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 21:20

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-20 21:20

Reported

2022-10-21 00:56

Platform

win7-20220812-en

Max time kernel

39s

Max time network

44s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1116 wrote to memory of 2032 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\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

Network

N/A

Files

memory/2032-54-0x0000000000000000-mapping.dmp

memory/2032-55-0x0000000076681000-0x0000000076683000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 21:20

Reported

2022-10-21 00:56

Platform

win10v2004-20220812-en

Max time kernel

112s

Max time network

140s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3112 wrote to memory of 5112 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3112 wrote to memory of 5112 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3112 wrote to memory of 5112 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\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ca03b35e8073165542c05981384ca00441059410ed61d0e5ab1294b1d68bf3f.dll,#1

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
IE 13.69.239.72:443 tcp
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp
NL 104.80.225.205:443 tcp

Files

memory/5112-132-0x0000000000000000-mapping.dmp