Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-lkhj7afhc3
Target c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238
SHA256 c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238
Tags
yunsip banker trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238

Threat Level: Known bad

The file c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238 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 09:35

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 09:35

Reported

2022-10-21 23:43

Platform

win10v2004-20220812-en

Max time kernel

91s

Max time network

136s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4948 wrote to memory of 4884 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4948 wrote to memory of 4884 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4948 wrote to memory of 4884 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\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
IE 13.69.239.73:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp

Files

memory/4884-132-0x0000000000000000-mapping.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-20 09:35

Reported

2022-10-21 23:44

Platform

win7-20220812-en

Max time kernel

37s

Max time network

49s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

Signatures

Yunsip

trojan banker yunsip

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c446e5da1c2a0938697469489ff2e86118b766e5d54a8f3e3e1c79f83b327238.dll,#1

Network

N/A

Files

memory/1736-54-0x0000000000000000-mapping.dmp

memory/1736-55-0x0000000075281000-0x0000000075283000-memory.dmp