fdf8d36c2411443a861f964e88834c1922b5d2360507cf5bb0113ce679ae4f27

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"	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.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	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe = "0"	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2008	powershell.exe
388	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nexus.lnk	powershell.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\Paths	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe = "0"	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.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	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2216 set thread context of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2008	powershell.exe
2008	powershell.exe
388	powershell.exe
388	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
Token: SeDebugPrivilege	2008	powershell.exe
Token: SeDebugPrivilege	388	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2008	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	87
PID 2216 wrote to memory of 2008	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	87
PID 2216 wrote to memory of 2000	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	89
PID 2216 wrote to memory of 2000	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	89
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 4828	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	91
PID 2216 wrote to memory of 1496	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	92
PID 2216 wrote to memory of 1496	2216	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe	92
PID 4828 wrote to memory of 388	4828	aspnet_wp.exe	94
PID 4828 wrote to memory of 388	4828	aspnet_wp.exe	94

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"	b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe

C:\Users\Admin\AppData\Local\Temp\b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe
"C:\Users\Admin\AppData\Local\Temp\b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe"
1⤵
- UAC bypass
- Windows security bypass
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2216
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b674f985f144f65b754715572db0cb17c0db762eb6d5217fbb93b15433572d97.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2008
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe"
  2⤵
  PID:2000
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4828
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "$ws = New-Object -ComObject WScript.Shell; $s = $ws.CreateShortcut('C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nexus.lnk'); $s.TargetPath = 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe'; $s.Save()"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops startup file
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:388
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:1496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry