Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-x9qsmsccd2
Target 0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6
SHA256 0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6
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

0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6

Threat Level: Known bad

The file 0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6 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 19:33

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:04

Platform

win7-20220812-en

Max time kernel

36s

Max time network

41s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1192 wrote to memory of 1400 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\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

Network

N/A

Files

memory/1400-54-0x0000000000000000-mapping.dmp

memory/1400-55-0x0000000076701000-0x0000000076703000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 19:33

Reported

2022-10-22 23:07

Platform

win10v2004-20220812-en

Max time kernel

205s

Max time network

231s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4160 wrote to memory of 4144 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4160 wrote to memory of 4144 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4160 wrote to memory of 4144 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\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ad5f8ca2bffb2fbdcb91cf3429708dc6a72506b37ed083f0420bdd8ed151fe6.dll,#1

Network

Country Destination Domain Proto
US 8.8.4.4:443 tcp
US 8.8.4.4:443 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
NL 104.80.225.205:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp

Files

memory/4144-132-0x0000000000000000-mapping.dmp