Malware Analysis Report

2025-08-05 21:40

Sample ID 230321-m7hn5shh73
Target unpacked_gozi_sample.exe
SHA256 646ab5eb6224824f04f4b78b80f47e2b7251c8ad9af55d806f7a016403f2fa45
Tags
isfb 5050 gozi
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

646ab5eb6224824f04f4b78b80f47e2b7251c8ad9af55d806f7a016403f2fa45

Threat Level: Known bad

The file unpacked_gozi_sample.exe was found to be: Known bad.

Malicious Activity Summary

isfb 5050 gozi

Gozi family

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-03-21 11:06

Signatures

Gozi family

gozi

Analysis: behavioral2

Detonation Overview

Submitted

2023-03-21 11:06

Reported

2023-03-21 11:08

Platform

win10v2004-20230220-en

Max time kernel

146s

Max time network

125s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4904 wrote to memory of 4120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4904 wrote to memory of 4120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4904 wrote to memory of 4120 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\unpacked_gozi_sample.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
US 8.8.8.8:53 39.146.190.20.in-addr.arpa udp
US 8.8.8.8:53 199.176.139.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 226.101.242.52.in-addr.arpa udp
IE 13.69.239.73:443 tcp
NL 8.238.178.254:80 tcp
NL 8.238.178.254:80 tcp
NL 8.238.178.254:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 131.253.33.203:80 tcp
US 8.8.8.8:53 63.13.109.52.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 210.81.184.52.in-addr.arpa udp
US 8.8.8.8:53 216.74.101.95.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-21 11:06

Reported

2023-03-21 11:08

Platform

win7-20230220-en

Max time kernel

31s

Max time network

33s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1536 wrote to memory of 1616 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\unpacked_gozi_sample.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

N/A

Files

N/A