Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-ahc15seder
Target 207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f
SHA256 207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f
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

207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f

Threat Level: Known bad

The file 207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f 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 00:12

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-20 00:12

Reported

2022-10-20 05:56

Platform

win7-20220812-en

Max time kernel

35s

Max time network

46s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1492 wrote to memory of 1376 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\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

Network

N/A

Files

memory/1376-54-0x0000000000000000-mapping.dmp

memory/1376-55-0x0000000075921000-0x0000000075923000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 00:12

Reported

2022-10-20 05:56

Platform

win10v2004-20220812-en

Max time kernel

145s

Max time network

164s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3424 wrote to memory of 4768 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3424 wrote to memory of 4768 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3424 wrote to memory of 4768 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\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\207a5de0ac3203b1128c5bf2603d64cc0136408747d7d8adf8d6ae53cb37836f.dll,#1

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 8.253.225.254:80 tcp
US 8.253.225.254:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 20.42.72.131:443 tcp

Files

memory/4768-132-0x0000000000000000-mapping.dmp