Malware Analysis Report

2025-03-15 03:53

Sample ID 230810-nz3j1sce26
Target 220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5
SHA256 220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5
Tags
aspackv2 fatalrat infostealer rat
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

220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5

Threat Level: Known bad

The file 220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5 was found to be: Known bad.

Malicious Activity Summary

aspackv2 fatalrat infostealer rat

FatalRat

Fatal Rat payload

Blocklisted process makes network request

ASPack v2.12-2.42

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-08-10 11:50

Signatures

ASPack v2.12-2.42

aspackv2
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-10 11:50

Reported

2023-08-10 11:53

Platform

win7-20230712-en

Max time kernel

141s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

Signatures

Blocklisted process makes network request

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

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\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 696 -s 284

Network

Country Destination Domain Proto
MU 156.236.70.181:16553 tcp

Files

memory/696-55-0x0000000074D70000-0x0000000074F03000-memory.dmp

memory/696-56-0x0000000074D50000-0x0000000074EE3000-memory.dmp

memory/696-57-0x0000000074D50000-0x0000000074EE3000-memory.dmp

memory/696-54-0x0000000074D50000-0x0000000074EE3000-memory.dmp

memory/696-58-0x0000000074BD0000-0x0000000074D63000-memory.dmp

memory/696-59-0x0000000074D70000-0x0000000074F03000-memory.dmp

memory/696-60-0x0000000074D50000-0x0000000074EE3000-memory.dmp

memory/696-61-0x0000000002700000-0x0000000002740000-memory.dmp

memory/696-63-0x0000000002700000-0x0000000002740000-memory.dmp

memory/696-71-0x0000000074D70000-0x0000000074F03000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-10 11:50

Reported

2023-08-10 11:53

Platform

win10v2004-20230703-en

Max time kernel

141s

Max time network

154s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

Signatures

FatalRat

infostealer rat fatalrat

Fatal Rat payload

rat infostealer
Description Indicator Process Target
N/A N/A N/A N/A

Blocklisted process makes network request

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3268 wrote to memory of 3732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3268 wrote to memory of 3732 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3268 wrote to memory of 3732 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\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\220533caffc31750c9e7d8226eca3d05c525df59fc81093c175001a0c2e68fb5.dll,#1

Network

Country Destination Domain Proto
MU 156.236.70.181:16553 tcp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
US 8.8.8.8:53 181.70.236.156.in-addr.arpa udp
MU 156.236.70.181:5858 tcp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 254.158.241.8.in-addr.arpa udp
US 8.8.8.8:53 64.13.109.52.in-addr.arpa udp
US 8.8.8.8:53 163.252.72.23.in-addr.arpa udp
US 8.8.8.8:53 24.73.42.20.in-addr.arpa udp

Files

memory/3732-133-0x00000000749C0000-0x0000000074B53000-memory.dmp

memory/3732-134-0x00000000749C0000-0x0000000074B53000-memory.dmp

memory/3732-135-0x00000000749C0000-0x0000000074B53000-memory.dmp

memory/3732-136-0x00000000749C0000-0x0000000074B53000-memory.dmp

memory/3732-137-0x0000000003210000-0x0000000003310000-memory.dmp

memory/3732-138-0x0000000002B90000-0x0000000002B91000-memory.dmp

memory/3732-140-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3732-139-0x0000000010000000-0x0000000010031000-memory.dmp

memory/3732-143-0x0000000003130000-0x000000000315A000-memory.dmp

memory/3732-148-0x00000000749C0000-0x0000000074B53000-memory.dmp

memory/3732-149-0x0000000003210000-0x0000000003310000-memory.dmp

memory/3732-152-0x00000000749C0000-0x0000000074B53000-memory.dmp