Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-tlrhgsebfq
Target ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1
SHA256 ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1
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

ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1

Threat Level: Known bad

The file ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1 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 16:09

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 16:09

Reported

2022-10-22 18:13

Platform

win7-20220901-en

Max time kernel

45s

Max time network

49s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 2016 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\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

Network

N/A

Files

memory/2016-54-0x0000000000000000-mapping.dmp

memory/2016-55-0x00000000766D1000-0x00000000766D3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 16:09

Reported

2022-10-22 18:13

Platform

win10v2004-20220901-en

Max time kernel

90s

Max time network

154s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4328 wrote to memory of 4368 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4328 wrote to memory of 4368 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4328 wrote to memory of 4368 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\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee33b4aa8c28f0aef965abc53f15624dc387601d87054180fb205b792a3cb8b1.dll,#1

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
NL 104.80.225.205:443 tcp
US 20.189.173.4:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp

Files

memory/4368-132-0x0000000000000000-mapping.dmp