Malware Analysis Report

2025-08-06 03:44

Sample ID 230501-fs4vhagd7w
Target stub.exe
SHA256 acd3fc66fd0197318253d2d5f4cb724b6cb54963f554b60839d03a252f560901
Tags
asyncrat default rat spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

acd3fc66fd0197318253d2d5f4cb724b6cb54963f554b60839d03a252f560901

Threat Level: Known bad

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

Malicious Activity Summary

asyncrat default rat spyware stealer

Async RAT payload

Asyncrat family

AsyncRat

Async RAT payload

Reads user/profile data of web browsers

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-05-01 05:09

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-01 05:09

Reported

2023-05-01 05:11

Platform

win10v2004-20230221-en

Max time kernel

133s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Reads user/profile data of web browsers

spyware stealer

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\stub.exe

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Network

Country Destination Domain Proto
US 40.125.122.176:443 tcp
US 8.8.8.8:53 176.122.125.40.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 39.146.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 ghoss.freeddns.org udp
DE 85.215.205.213:8808 ghoss.freeddns.org tcp
US 8.8.8.8:53 213.205.215.85.in-addr.arpa udp
US 40.125.122.176:443 tcp
US 20.189.173.4:443 tcp
US 40.125.122.176:443 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 1.77.109.52.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 40.125.122.176:443 tcp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
US 40.125.122.176:443 tcp
US 40.125.122.176:443 tcp
US 40.125.122.176:443 tcp

Files

memory/748-133-0x00000000006F0000-0x0000000000706000-memory.dmp

memory/748-134-0x0000000005190000-0x00000000051A0000-memory.dmp

memory/748-135-0x0000000005B50000-0x00000000060F4000-memory.dmp

memory/748-136-0x0000000005780000-0x0000000005812000-memory.dmp

memory/748-137-0x0000000005770000-0x000000000577A000-memory.dmp

memory/748-138-0x0000000006240000-0x00000000062DC000-memory.dmp

memory/748-139-0x00000000062E0000-0x0000000006346000-memory.dmp

memory/748-140-0x0000000005190000-0x00000000051A0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-01 05:09

Reported

2023-05-01 05:11

Platform

win7-20230220-en

Max time kernel

31s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Reads user/profile data of web browsers

spyware stealer

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\stub.exe

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ghoss.freeddns.org udp
DE 85.215.205.213:6606 ghoss.freeddns.org tcp

Files

memory/1408-54-0x0000000000B00000-0x0000000000B16000-memory.dmp

memory/1408-55-0x0000000000380000-0x00000000003C0000-memory.dmp