Malware Analysis Report

2025-01-18 18:16

Sample ID 241219-27x66aspdx
Target cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.exe
SHA256 cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebec
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

cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebec

Threat Level: Known bad

The file cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.exe was found to be: Known bad.

Malicious Activity Summary

yunsip banker discovery trojan

Yunsip

Yunsip family

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-19 23:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-19 23:14

Reported

2024-12-19 23:16

Platform

win7-20241010-en

Max time kernel

77s

Max time network

19s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.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 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2880 wrote to memory of 2876 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\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-19 23:14

Reported

2024-12-19 23:16

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

102s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.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 4024 wrote to memory of 4896 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4024 wrote to memory of 4896 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4024 wrote to memory of 4896 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\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd8d1fcd8f05cddad6afea1c69dcd73db468ad6c4716773f9646b0b6a940ebecN.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

N/A