Malware Analysis Report

2024-10-19 10:29

Sample ID 221020-z6z81sfbf8
Target 82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a
SHA256 82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a
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

82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a

Threat Level: Known bad

The file 82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a 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

2022-10-20 21:20

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-20 21:20

Reported

2022-10-21 00:44

Platform

win7-20220812-en

Max time kernel

40s

Max time network

44s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

Signatures

Yunsip

trojan banker yunsip

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

Network

N/A

Files

memory/544-54-0x0000000000000000-mapping.dmp

memory/544-55-0x0000000076151000-0x0000000076153000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-20 21:20

Reported

2022-10-21 00:44

Platform

win10v2004-20220812-en

Max time kernel

158s

Max time network

168s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4308 wrote to memory of 1560 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4308 wrote to memory of 1560 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4308 wrote to memory of 1560 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\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\82bdac6e02abb36ffc886ad3f68250806b83fb50b3f9de03408e28b8f94d498a.dll,#1

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
NL 104.80.225.205:443 tcp
US 52.182.143.208:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 40.125.122.151:443 tcp
US 8.8.8.8:53 97.97.242.52.in-addr.arpa udp

Files

memory/1560-132-0x0000000000000000-mapping.dmp