Malware Analysis Report

2025-08-06 03:44

Sample ID 230427-d48aysdd95
Target AsyncClient.exe
SHA256 e4754f6bf9dab9b5c124d1d1b1238ddbfa1383e593f686f55a9eb747d44a938f
Tags
rat default asyncrat evasion 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 Overview

score
10/10

SHA256

e4754f6bf9dab9b5c124d1d1b1238ddbfa1383e593f686f55a9eb747d44a938f

Threat Level: Known bad

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

Malicious Activity Summary

rat default asyncrat evasion trojan

Modifies Windows Defender Real-time Protection settings

AsyncRat

Async RAT payload

Asyncrat family

Async RAT payload

Windows security modification

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-04-27 03:34

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: behavioral1

Detonation Overview

Submitted

2023-04-27 03:34

Reported

2023-04-27 03:37

Platform

win10v2004-20230220-en

Max time kernel

135s

Max time network

154s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Modifies Windows Defender Real-time Protection settings

evasion trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1" C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1" C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1" C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A

Async RAT payload

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

Windows security modification

evasion trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

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

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

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell" Get-MpPreference -verbose

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 32.18.126.40.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
N/A 127.0.0.1:61288 tcp
US 146.70.165.10:61288 tcp
US 8.8.8.8:53 10.165.70.146.in-addr.arpa udp
US 13.89.179.9:443 tcp
US 146.70.165.10:61288 tcp
US 52.152.110.14:443 tcp
NL 8.238.20.126:80 tcp
US 146.70.165.10:61288 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 api.msn.com tcp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 64.13.109.52.in-addr.arpa udp
NL 8.238.177.126:80 tcp
US 146.70.165.10:61288 tcp
US 52.152.110.14:443 tcp
US 146.70.165.10:61288 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp

Files

memory/1760-133-0x0000000000A40000-0x0000000000A52000-memory.dmp

memory/1760-134-0x0000000005430000-0x0000000005440000-memory.dmp

memory/1760-135-0x0000000005430000-0x0000000005440000-memory.dmp

memory/1760-136-0x0000000005960000-0x00000000059FC000-memory.dmp

memory/1760-137-0x0000000005FB0000-0x0000000006554000-memory.dmp

memory/1760-138-0x0000000005A70000-0x0000000005AD6000-memory.dmp

memory/1760-139-0x0000000006BE0000-0x0000000006C56000-memory.dmp

memory/1760-140-0x0000000006BB0000-0x0000000006BCE000-memory.dmp

memory/1760-141-0x0000000006D30000-0x0000000006DC2000-memory.dmp

memory/5080-142-0x0000000002AF0000-0x0000000002B26000-memory.dmp

memory/5080-143-0x0000000005520000-0x0000000005B48000-memory.dmp

memory/5080-144-0x0000000005CA0000-0x0000000005CC2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mdsr1ged.dpc.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/5080-150-0x0000000005D40000-0x0000000005DA6000-memory.dmp

memory/5080-155-0x0000000002B90000-0x0000000002BA0000-memory.dmp

memory/5080-156-0x0000000002B90000-0x0000000002BA0000-memory.dmp

memory/5080-157-0x0000000006420000-0x000000000643E000-memory.dmp

memory/5080-158-0x0000000002B90000-0x0000000002BA0000-memory.dmp

memory/5080-159-0x000000007F590000-0x000000007F5A0000-memory.dmp

memory/5080-160-0x00000000069E0000-0x0000000006A12000-memory.dmp

memory/5080-161-0x0000000070150000-0x000000007019C000-memory.dmp

memory/5080-171-0x00000000069C0000-0x00000000069DE000-memory.dmp

memory/5080-172-0x0000000007D70000-0x00000000083EA000-memory.dmp

memory/5080-173-0x0000000007720000-0x000000000773A000-memory.dmp

memory/5080-174-0x0000000007790000-0x000000000779A000-memory.dmp

memory/5080-175-0x00000000079A0000-0x0000000007A36000-memory.dmp

memory/5080-176-0x0000000007960000-0x000000000796E000-memory.dmp

memory/5080-177-0x0000000007A60000-0x0000000007A7A000-memory.dmp

memory/5080-178-0x0000000007A50000-0x0000000007A58000-memory.dmp