Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-x9f87sccc3
Target ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3
SHA256 ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3
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

ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3

Threat Level: Known bad

The file ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3 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 19:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 19:32

Reported

2022-10-22 23:06

Platform

win7-20220812-en

Max time kernel

11s

Max time network

49s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1908 wrote to memory of 1492 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\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

Network

N/A

Files

memory/1492-54-0x0000000000000000-mapping.dmp

memory/1492-55-0x0000000075B11000-0x0000000075B13000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 19:32

Reported

2022-10-22 23:03

Platform

win10v2004-20220812-en

Max time kernel

81s

Max time network

145s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2328 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2328 wrote to memory of 2732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2328 wrote to memory of 2732 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\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac54420704a8e6381550cd3394cd11151c488d5548ce9d91b45e073a649c5ab3.dll,#1

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
FR 40.79.141.153:443 tcp
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp

Files

memory/2732-132-0x0000000000000000-mapping.dmp