Malware Analysis Report

2025-01-18 18:15

Sample ID 241203-grz1lasqf1
Target 6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.exe
SHA256 6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d
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

6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d

Threat Level: Known bad

The file 6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.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

2024-12-03 06:03

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-03 06:03

Reported

2024-12-03 06:05

Platform

win7-20240903-en

Max time kernel

122s

Max time network

130s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.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 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2236 wrote to memory of 1792 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\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-03 06:03

Reported

2024-12-03 06:05

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.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 4004 wrote to memory of 2332 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4004 wrote to memory of 2332 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4004 wrote to memory of 2332 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\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6632fc5ec3340c29aed587f734670ca2f4a7c2b57d08f1a0d76f50131e396f3d.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

N/A