sheetrat | 41e33d2a84887bfb81f3ffa85ee56d2c5d1b87729c7fccdde6e65ef4afa928a8

Windows Service

Disable or Modify Tools

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	Holy Check.exe

Modifies Windows Defender TamperProtection settings 3 TTPs 1 IoCs

evasion trojan

Modify Registry

Windows Service

Disable or Modify Tools

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features\TamperProtection = "0"	Holy Check.exe

UAC bypass 3 TTPs 4 IoCs

defense_evasion trojan

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"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	Holy Check.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

Disable or Modify System Firewall

T1562.004

pid	Process
3436	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes a file named after a Windows system binary 1 TTPs 1 IoCs

The file runs from a user directory while carrying the name of an executable that normally only exists in System32.

defense_evasion

Match Legitimate Name or Location

T1036.005

description	ioc	Process
File opened (read-only)	C:\Users\Admin\AppData\Roaming\Microsoft\Protect\dllhost.exe	Holy Check.exe

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Windows security modification 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

Modify Registry

persistence privilege_escalation

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features\TamperProtection = "0"	Holy Check.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

defense_evasion trojan

System Information Discovery

T1082

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

Looks up external IP address via web service 1 TTPs 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
6	ip-api.com

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3476	sc.exe
4504	sc.exe
2448	sc.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4812	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	Holy Check.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Holy Check.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	Holy Check.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Holy Check.exe

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\gogoduck	Holy Check.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	Holy Check.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

persistence execution

Scheduled Task

pid	Process
2288	schtasks.exe
4740	schtasks.exe
1488	schtasks.exe
4920	schtasks.exe
1916	schtasks.exe
2664	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2056	Holy Check.exe
Token: SeDebugPrivilege	1256	Holy Check.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 4812	2056	Holy Check.exe	86
PID 4812 wrote to memory of 3436	4812	cmd.exe	88
PID 2056 wrote to memory of 3476	2056	Holy Check.exe	90
PID 2056 wrote to memory of 4504	2056	Holy Check.exe	92
PID 2056 wrote to memory of 2448	2056	Holy Check.exe	94
PID 2056 wrote to memory of 2812	2056	Holy Check.exe	97
PID 2056 wrote to memory of 1916	2056	Holy Check.exe	100
PID 2056 wrote to memory of 1584	2056	Holy Check.exe	103
PID 2056 wrote to memory of 2664	2056	Holy Check.exe	105
PID 2056 wrote to memory of 3256	2056	Holy Check.exe	107
PID 2056 wrote to memory of 2288	2056	Holy Check.exe	109
PID 2056 wrote to memory of 4508	2056	Holy Check.exe	111
PID 2056 wrote to memory of 4740	2056	Holy Check.exe	113
PID 2056 wrote to memory of 2124	2056	Holy Check.exe	115
PID 2056 wrote to memory of 1488	2056	Holy Check.exe	117
PID 2056 wrote to memory of 3952	2056	Holy Check.exe	119
PID 2056 wrote to memory of 4920	2056	Holy Check.exe	121

System policy modification 1 TTPs 6 IoCs

defense_evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\FilterAdministratorToken = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableUIADesktopToggle = "1"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Holy Check.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\Holy Check.exe
"C:\Users\Admin\AppData\Local\Temp\Holy Check.exe"
1⤵
- Modifies Windows Defender DisableAntiSpyware settings
- Modifies Windows Defender TamperProtection settings
- UAC bypass
- Executes a file named after a Windows system binary
- Windows security modification
- Checks whether UAC is enabled
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2056
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C netsh advfirewall firewall add rule name="QeFpSiX4SFvaSb" dir=in action=allow program="C:\Users\Admin\AppData\Local\Temp\Holy Check.exe" enable=yes & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4812
- - C:\Windows\system32\netsh.exe
    netsh advfirewall firewall add rule name="QeFpSiX4SFvaSb" dir=in action=allow program="C:\Users\Admin\AppData\Local\Temp\Holy Check.exe" enable=yes
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    PID:3436
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" delete "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:3476
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" create "WindowsUpdaterDefenderMicrosoft" binPath= "C:\Users\Admin\AppData\Local\Temp\Holy Check.exe" start= auto DisplayName= "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:4504
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" start "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:2448
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "User_Feed_Synchronization-5c4f519a-2b33-413e-ba25-ef79a36457ce" /F
  2⤵
  PID:2812
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "User_Feed_Synchronization-5c4f519a-2b33-413e-ba25-ef79a36457ce" /XML "C:\Users\Admin\AppData\Local\Temp\bd441614-7354-46ce-987b-b9cf0102a992.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1916
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "GoogleUpdateTaskMachineCore_4bddf754" /F
  2⤵
  PID:1584
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "GoogleUpdateTaskMachineCore_4bddf754" /XML "C:\Users\Admin\AppData\Local\Temp\8ec2e09e-006e-4d0c-b609-087a921f32f7.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2664
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "User_Feed_Synchronization-6816a96c-23fd-453e-90c4-799dd8bcb32c" /F
  2⤵
  PID:3256
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "User_Feed_Synchronization-6816a96c-23fd-453e-90c4-799dd8bcb32c" /XML "C:\Users\Admin\AppData\Local\Temp\79b5dd93-f4a3-442c-aaf4-88035e583e6d.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2288
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "Adobe Acrobat Update Task_05a00a20" /F
  2⤵
  PID:4508
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "Adobe Acrobat Update Task_05a00a20" /XML "C:\Users\Admin\AppData\Local\Temp\f81d3cb1-36ca-4f35-9358-1316e051fb45.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4740
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "UsbCeip_7a42ae04" /F
  2⤵
  PID:2124
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "UsbCeip_7a42ae04" /XML "C:\Users\Admin\AppData\Local\Temp\efb99a3d-6dfc-49ce-b871-c62295ea5cc4.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1488
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "StartupAppTask_80cb826f" /F
  2⤵
  PID:3952
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "StartupAppTask_80cb826f" /XML "C:\Users\Admin\AppData\Local\Temp\d17eb560-89bd-4b64-bc73-15fc1416fdc7.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4920

C:\Users\Admin\AppData\Local\Temp\Holy Check.exe
"C:\Users\Admin\AppData\Local\Temp\Holy Check.exe"
1⤵
- Reads the TCP/IP host and domain name from the registry
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1256

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Masquerading

T1036

Match Legitimate Name or Location

T1036.005

Modify Registry