Malware Analysis Report

2025-01-18 18:16

Sample ID 241207-b5kj6svmfm
Target 045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.exe
SHA256 045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d

Threat Level: Known bad

The file 045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.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

2024-12-07 01:43

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-07 01:43

Reported

2024-12-07 01:45

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

97s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.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 1644 wrote to memory of 5072 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1644 wrote to memory of 5072 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1644 wrote to memory of 5072 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\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 180.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-07 01:43

Reported

2024-12-07 01:45

Platform

win7-20241010-en

Max time kernel

119s

Max time network

16s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.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 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1800 wrote to memory of 3012 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\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\045a53e1b87c651a9fbed462127e6cd229ccea30f4a7ffe63e067fb396a09f1d.dll,#1

Network

N/A

Files

N/A