Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-tltb3sebgj
Target 2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f
SHA256 2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f
Tags
yunsip banker trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f

Threat Level: Known bad

The file 2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f was found to be: Known bad.

Malicious Activity Summary

yunsip banker trojan

Yunsip

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-10-21 16:09

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 16:09

Reported

2022-10-22 18:13

Platform

win7-20220901-en

Max time kernel

47s

Max time network

52s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1380 wrote to memory of 1672 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\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

Network

N/A

Files

memory/1672-54-0x0000000000000000-mapping.dmp

memory/1672-55-0x00000000757A1000-0x00000000757A3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 16:09

Reported

2022-10-22 18:13

Platform

win10v2004-20220812-en

Max time kernel

99s

Max time network

133s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5012 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5012 wrote to memory of 2080 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5012 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\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe8d2516d2bf0efe9a5d4ff731d05f165a7aa1e97cc19c680e2036b3a29613f.dll,#1

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
NL 8.248.5.254:80 tcp

Files

memory/2080-132-0x0000000000000000-mapping.dmp