Malware Analysis Report

2025-01-18 18:16

Sample ID 241219-jp48mswnbj
Target 71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.exe
SHA256 71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2e
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

71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2e

Threat Level: Known bad

The file 71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.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 07:51

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-19 07:51

Reported

2024-12-19 07:53

Platform

win7-20240903-en

Max time kernel

118s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.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 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2144 wrote to memory of 2748 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\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-19 07:51

Reported

2024-12-19 07:53

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

96s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.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 988 wrote to memory of 2432 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 988 wrote to memory of 2432 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 988 wrote to memory of 2432 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\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\71515d0385670d44c8e59c79720a1f2a52120d4e8b8e190dc95817de2ca16f2eN.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.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 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A