Malware Analysis Report

2025-08-05 21:40

Sample ID 230321-m6tp1sbh6y
Target unpacked_gozi_sample.exe.dll
SHA256 646ab5eb6224824f04f4b78b80f47e2b7251c8ad9af55d806f7a016403f2fa45
Tags
isfb 5050 gozi
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

646ab5eb6224824f04f4b78b80f47e2b7251c8ad9af55d806f7a016403f2fa45

Threat Level: Known bad

The file unpacked_gozi_sample.exe.dll 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 11:05

Signatures

Gozi family

gozi

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-21 11:05

Reported

2023-03-21 11:07

Platform

win7-20230220-en

Max time kernel

31s

Max time network

34s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2004 wrote to memory of 1732 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.exe.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-03-21 11:05

Reported

2023-03-21 11:07

Platform

win10v2004-20230220-en

Max time kernel

135s

Max time network

146s

Command Line

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

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1744 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1744 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1744 wrote to memory of 4464 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.exe.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\unpacked_gozi_sample.exe.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 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 202.74.101.95.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 13.89.179.9:443 tcp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 199.176.139.52.in-addr.arpa udp
NL 8.238.20.126:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 63.13.109.52.in-addr.arpa udp
NL 8.238.177.126:80 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp

Files

N/A