asyncrat | 72ec6f81b0de47f93bb8941bd86a10377a0bd6e5f188120679396ede0886a4b3

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	svchost.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Roaming\svchost.exe = "0"	svchost.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	WindowsUpdates.exe
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2132	svchost.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Roaming\svchost.exe = "0"	svchost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	WindowsUpdates.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2132 set thread context of 4476	2132	svchost.exe	105

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

pid	Process
3136	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4484	timeout.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
2456	WindowsUpdates.exe
3896	powershell.exe
3896	powershell.exe
3896	powershell.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe
4476	CasPol.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	WindowsUpdates.exe
Token: SeDebugPrivilege	2132	svchost.exe
Token: SeDebugPrivilege	3896	powershell.exe
Token: SeDebugPrivilege	4476	CasPol.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4476	CasPol.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 1232	2456	WindowsUpdates.exe	94
PID 2456 wrote to memory of 1232	2456	WindowsUpdates.exe	94
PID 2456 wrote to memory of 2972	2456	WindowsUpdates.exe	96
PID 2456 wrote to memory of 2972	2456	WindowsUpdates.exe	96
PID 2972 wrote to memory of 4484	2972	cmd.exe	98
PID 2972 wrote to memory of 4484	2972	cmd.exe	98
PID 1232 wrote to memory of 3136	1232	cmd.exe	99
PID 1232 wrote to memory of 3136	1232	cmd.exe	99
PID 2972 wrote to memory of 2132	2972	cmd.exe	102
PID 2972 wrote to memory of 2132	2972	cmd.exe	102
PID 2132 wrote to memory of 3896	2132	svchost.exe	104
PID 2132 wrote to memory of 3896	2132	svchost.exe	104
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105
PID 2132 wrote to memory of 4476	2132	svchost.exe	105

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	svchost.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\$TEMP\WindowsUpdates.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\WindowsUpdates.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3136
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp49DA.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4484
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - UAC bypass
    - Windows security bypass
    - Checks computer location settings
    - Executes dropped EXE
    - Windows security modification
    - Checks whether UAC is enabled
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:2132
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3896
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry