Malware Analysis Report

2025-08-05 13:07

Sample ID 220322-nnry5sbdck
Target readme2.bin
SHA256 d6bbd7322d650172dc416d232a8965a35d18051d29634116df4f8cb175dd660d
Tags
gozi_ifsb 7626 banker trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

d6bbd7322d650172dc416d232a8965a35d18051d29634116df4f8cb175dd660d

Threat Level: Known bad

The file readme2.bin was found to be: Known bad.

Malicious Activity Summary

gozi_ifsb 7626 banker trojan

Gozi, Gozi IFSB

Drops file in System32 directory

Program crash

Enumerates system info in registry

Suspicious use of WriteProcessMemory

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-22 11:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-22 11:32

Reported

2022-03-22 11:35

Platform

win7-20220311-en

Max time kernel

4294180s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\readme2.dll,#1

Signatures

Gozi, Gozi IFSB

banker trojan gozi_ifsb

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\readme2.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\readme2.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 224

Network

N/A

Files

memory/1620-54-0x00000000755A1000-0x00000000755A3000-memory.dmp

memory/1620-55-0x0000000000740000-0x00000000007E8000-memory.dmp

memory/1620-57-0x00000000001F0000-0x00000000001FE000-memory.dmp

memory/1620-56-0x00000000001F0000-0x00000000001FE000-memory.dmp

memory/1620-59-0x00000000001F0000-0x00000000001FE000-memory.dmp

memory/1620-60-0x00000000001C0000-0x00000000001CC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-22 11:32

Reported

2022-03-22 11:35

Platform

win10v2004-20220310-en

Max time kernel

132s

Max time network

135s

Command Line

C:\Windows\System32\svchost.exe -k netsvcs -p

Signatures

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{C6C67993-B833-442B-B03B-775A186CCC00}.catalogItem C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{24DC5DB5-0B07-4401-AFB2-C8BF064973A8}.catalogItem C:\Windows\System32\svchost.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\System32\svchost.exe N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Windows\System32\svchost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2724 wrote to memory of 5016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2724 wrote to memory of 5016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2724 wrote to memory of 5016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k netsvcs -p

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\readme2.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\readme2.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 licensing.mp.microsoft.com udp
US 20.96.63.25:443 licensing.mp.microsoft.com tcp
US 8.8.8.8:53 storesdk.dsx.mp.microsoft.com udp
FR 2.18.109.224:443 storesdk.dsx.mp.microsoft.com tcp
US 20.96.63.25:443 licensing.mp.microsoft.com tcp
US 20.96.63.25:443 licensing.mp.microsoft.com tcp
US 20.96.63.25:443 licensing.mp.microsoft.com tcp

Files

N/A