Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-ahcelsecc4
Target 307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0
SHA256 307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0
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

307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0

Threat Level: Known bad

The file 307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0 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 05:53

Platform

win7-20220812-en

Max time kernel

26s

Max time network

47s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1628 wrote to memory of 1880 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\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

Network

N/A

Files

memory/1880-54-0x0000000000000000-mapping.dmp

memory/1880-55-0x0000000076201000-0x0000000076203000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 00:12

Reported

2022-10-20 05:53

Platform

win10v2004-20220812-en

Max time kernel

147s

Max time network

177s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4412 wrote to memory of 4824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4412 wrote to memory of 4824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4412 wrote to memory of 4824 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\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\307ec13c5bbf0d83401c460b76b095400af68a527718306d0ba8b1cc3fccc3d0.dll,#1

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 52.182.141.63:443 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp

Files

memory/4824-132-0x0000000000000000-mapping.dmp