Malware Analysis Report

2025-01-18 18:16

Sample ID 241215-z2sndaypam
Target 34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf
SHA256 34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf
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

34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf

Threat Level: Known bad

The file 34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf 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

2024-12-15 21:13

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-15 21:13

Reported

2024-12-15 21:15

Platform

win7-20240903-en

Max time kernel

120s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.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 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2692 wrote to memory of 2408 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\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-15 21:13

Reported

2024-12-15 21:15

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

143s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.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 3052 wrote to memory of 2388 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3052 wrote to memory of 2388 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3052 wrote to memory of 2388 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\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\34a33d1ce7b83e5be9e8f1addf2ed558cc04a2c74a32a83c875f176adac0cebf.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

N/A