Malware Analysis Report

2025-01-18 18:16

Sample ID 241216-y2n5hszjbs
Target 1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37
SHA256 1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37
Tags
yunsip banker discovery trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37

Threat Level: Known bad

The file 1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37 was found to be: Known bad.

Malicious Activity Summary

yunsip banker discovery trojan

Yunsip family

Yunsip

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-16 20:17

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-16 20:17

Reported

2024-12-16 20:19

Platform

win7-20241010-en

Max time kernel

14s

Max time network

18s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

Signatures

Yunsip

trojan banker yunsip

Yunsip family

yunsip

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2076 wrote to memory of 1552 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\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-16 20:17

Reported

2024-12-16 20:19

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

147s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

Signatures

Yunsip

trojan banker yunsip

Yunsip family

yunsip

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3184 wrote to memory of 1600 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3184 wrote to memory of 1600 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3184 wrote to memory of 1600 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\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1716d70321717098882dae5ba5bfbc0365bf031e3faeda932f592ecbcd6c9c37.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 20.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

N/A