Malware Analysis Report

2025-01-18 18:16

Sample ID 241207-ame2asvrfx
Target 891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.exe
SHA256 891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305
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

891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305

Threat Level: Known bad

The file 891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.exe was found to be: Known bad.

Malicious Activity Summary

yunsip banker discovery trojan

Yunsip

Yunsip family

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-07 00:19

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-07 00:19

Reported

2024-12-07 00:21

Platform

win7-20240903-en

Max time kernel

16s

Max time network

17s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.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 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2212 wrote to memory of 2444 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\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-07 00:19

Reported

2024-12-07 00:21

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

95s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.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 4300 wrote to memory of 2844 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4300 wrote to memory of 2844 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4300 wrote to memory of 2844 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\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\891fddda82d3ec31f8fdfdf9fb6d503ca3dbb254286bcc931816bf6e3e92c305N.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 160.50.123.104.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

N/A