Malware Analysis Report

2025-01-18 18:16

Sample ID 241129-qgkycs1rfn
Target 290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.exe
SHA256 290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4f
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

290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4f

Threat Level: Known bad

The file 290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.exe 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

2024-11-29 13:13

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-29 13:13

Reported

2024-11-29 13:16

Platform

win7-20240903-en

Max time kernel

29s

Max time network

16s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.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 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1044 wrote to memory of 2280 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\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-29 13:13

Reported

2024-11-29 13:16

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

95s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.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 3148 wrote to memory of 4796 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3148 wrote to memory of 4796 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3148 wrote to memory of 4796 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\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\290a9efc4fdd998fd8e30fe0c001f44c2aa698efea9f643ea63bca6eff8a5e4fN.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 101.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 102.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

N/A