Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-z6v93afaan
Target c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f
SHA256 c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f
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

c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f

Threat Level: Known bad

The file c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f 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

win7-20220901-en

Max time kernel

47s

Max time network

52s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

Network

N/A

Files

memory/1252-54-0x0000000000000000-mapping.dmp

memory/1252-55-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 21:20

Reported

2022-10-21 00:56

Platform

win10v2004-20220901-en

Max time kernel

112s

Max time network

140s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1836 wrote to memory of 1496 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1836 wrote to memory of 1496 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1836 wrote to memory of 1496 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\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6fba941aee3b86f2582c1c0b8f8c53ee182a9fb95373251e134799121775f7f.dll,#1

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
NL 142.251.39.100:80 tcp
US 209.197.3.8:80 tcp
NL 142.251.39.100:80 tcp
US 209.202.254.10:443 tcp
US 209.197.3.8:80 tcp
US 52.109.8.86:443 tcp
US 20.189.173.5:443 tcp
NL 104.80.225.205:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 8.8.8.8:53 14.110.152.52.in-addr.arpa udp
IE 212.82.100.137:80 tcp
US 13.107.42.16:443 tcp

Files

memory/1496-132-0x0000000000000000-mapping.dmp