sheetrat | 41e33d2a84887bfb81f3ffa85ee56d2c5d1b87729c7fccdde6e65ef4afa928a8

Windows Service

Disable or Modify Tools

T1562.001

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

UAC bypass 3 TTPs 4 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
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\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

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

persistence privilege_escalation

Disable or Modify System Firewall

T1562.004

pid	Process
2988	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\Local\Microsoft\Windows\PowerShell\RuntimeBroker.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

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
1	ip-api.com

Launches sc.exe 3 IoCs

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

pid	Process
4268	sc.exe
3204	sc.exe
4508	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
4432	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
5868	schtasks.exe
5372	schtasks.exe
2556	schtasks.exe
6032	schtasks.exe
824	schtasks.exe
6048	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1656	Holy Check.exe
Token: SeDebugPrivilege	3216	Holy Check.exe
Token: SeShutdownPrivilege	1656	Holy Check.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 4432	1656	Holy Check.exe	91
PID 4432 wrote to memory of 2988	4432	cmd.exe	93
PID 1656 wrote to memory of 4268	1656	Holy Check.exe	94
PID 1656 wrote to memory of 3204	1656	Holy Check.exe	96
PID 1656 wrote to memory of 4508	1656	Holy Check.exe	98
PID 1656 wrote to memory of 5228	1656	Holy Check.exe	101
PID 1656 wrote to memory of 5868	1656	Holy Check.exe	104
PID 1656 wrote to memory of 948	1656	Holy Check.exe	106
PID 1656 wrote to memory of 5372	1656	Holy Check.exe	108
PID 1656 wrote to memory of 5684	1656	Holy Check.exe	110
PID 1656 wrote to memory of 2556	1656	Holy Check.exe	112
PID 1656 wrote to memory of 6016	1656	Holy Check.exe	114
PID 1656 wrote to memory of 6032	1656	Holy Check.exe	116
PID 1656 wrote to memory of 2932	1656	Holy Check.exe	118
PID 1656 wrote to memory of 824	1656	Holy Check.exe	120
PID 1656 wrote to memory of 2108	1656	Holy Check.exe	122
PID 1656 wrote to memory of 6048	1656	Holy Check.exe	124

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\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
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

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
- UAC bypass
- Executes a file named after a Windows system binary
- 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:1656
- 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:4432
- - 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:2988
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" delete "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:4268
- 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:3204
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" start "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:4508
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "GoogleUpdateTaskMachineCore_63591346" /F
  2⤵
  PID:5228
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "GoogleUpdateTaskMachineCore_63591346" /XML "C:\Users\Admin\AppData\Local\Temp\77729cf4-2215-423b-9e4e-4faf06bbcb83.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5868
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "Consolidator_55ad8a59" /F
  2⤵
  PID:948
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "Consolidator_55ad8a59" /XML "C:\Users\Admin\AppData\Local\Temp\f168bcfe-a683-497e-90fd-e62ed10fb1ad.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5372
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "DropboxUpdateTaskMachineCore_711d4d75" /F
  2⤵
  PID:5684
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "DropboxUpdateTaskMachineCore_711d4d75" /XML "C:\Users\Admin\AppData\Local\Temp\468285d0-f6a4-4e2f-8d0b-581ca8058a30.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2556
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "SystemSoundsService_eb08a9d1" /F
  2⤵
  PID:6016
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "SystemSoundsService_eb08a9d1" /XML "C:\Users\Admin\AppData\Local\Temp\9045085b-9833-4560-bfac-b6332db8ccb8.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:6032
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "NvDriverUpdateCheckDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_c59d9f04" /F
  2⤵
  PID:2932
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "NvDriverUpdateCheckDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_c59d9f04" /XML "C:\Users\Admin\AppData\Local\Temp\5713c65e-b11f-4e8b-b7c4-e65aa23a14c7.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:824
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "Consolidator_7de761b3" /F
  2⤵
  PID:2108
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "Consolidator_7de761b3" /XML "C:\Users\Admin\AppData\Local\Temp\669c28ab-8ca6-4f39-9266-c11eab0d50e6.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:6048

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:3216

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

T1562.001

Masquerading

T1036

Match Legitimate Name or Location

T1036.005

Modify Registry