Malware Analysis Report

2025-01-18 18:17

Sample ID 241124-aqm63svjcz
Target 2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.exe
SHA256 2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866
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

2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866

Threat Level: Known bad

The file 2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.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

2024-11-24 00:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-24 00:25

Reported

2024-11-24 00:27

Platform

win7-20241010-en

Max time kernel

121s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.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 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2080 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\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-24 00:25

Reported

2024-11-24 00:27

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

136s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.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 688 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 688 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 688 wrote to memory of 2084 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\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fcc0412df67cd6c5984e237a77efc04ba3739b72acd2d5f39bfa5a2333fd866.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 201.68.20.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.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 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A