Malware Analysis Report

2024-10-19 10:29

Sample ID 221021-kpetesbhgp
Target 1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29
SHA256 1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29
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

1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29

Threat Level: Known bad

The file 1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29 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 08:46

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-21 08:46

Reported

2022-10-21 18:31

Platform

win7-20220812-en

Max time kernel

36s

Max time network

42s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

Signatures

Yunsip

trojan banker yunsip

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

Network

N/A

Files

memory/1488-54-0x0000000000000000-mapping.dmp

memory/1488-55-0x0000000076071000-0x0000000076073000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-21 08:46

Reported

2022-10-21 18:31

Platform

win10v2004-20220812-en

Max time kernel

151s

Max time network

153s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

Signatures

Yunsip

trojan banker yunsip

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1680 wrote to memory of 836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1680 wrote to memory of 836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1680 wrote to memory of 836 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\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b57418efd1b2646fe205b6d0050c975bca507b29e043dbd562e122964102c29.dll,#1

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 8.253.225.254:80 tcp
US 8.253.225.254:80 tcp
US 8.8.8.8:53 15.89.54.20.in-addr.arpa udp
US 209.197.3.8:80 tcp
N/A 20.42.72.131:443 tcp

Files

memory/836-132-0x0000000000000000-mapping.dmp