sheetrat | 150fa4724d04ab88fb53e0ffc6e84d97c473c5a322a11642ea50f87de38c7bb0

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\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\EnableLUA = "0"	Holy Check.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "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
2052	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 2 IoCs

pid	Process
1300	SkypeHost.exe
5796	MicrosoftEdgeUpdate.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
5136	sc.exe
2356	sc.exe
1096	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
2628	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 8 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\Domain	Holy Check.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	SkypeHost.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	MicrosoftEdgeUpdate.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
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	SkypeHost.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	MicrosoftEdgeUpdate.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
3968	schtasks.exe
1620	schtasks.exe
4840	schtasks.exe
5936	schtasks.exe
1680	schtasks.exe
2716	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	5168	Holy Check.exe
Token: SeDebugPrivilege	5472	Holy Check.exe
Token: SeDebugPrivilege	1300	SkypeHost.exe
Token: SeDebugPrivilege	5796	MicrosoftEdgeUpdate.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5168 wrote to memory of 2628	5168	Holy Check.exe	91
PID 2628 wrote to memory of 2052	2628	cmd.exe	93
PID 5168 wrote to memory of 5136	5168	Holy Check.exe	94
PID 5168 wrote to memory of 2356	5168	Holy Check.exe	96
PID 5168 wrote to memory of 1096	5168	Holy Check.exe	98
PID 5168 wrote to memory of 2508	5168	Holy Check.exe	101
PID 5168 wrote to memory of 5936	5168	Holy Check.exe	104
PID 5168 wrote to memory of 2108	5168	Holy Check.exe	107
PID 5168 wrote to memory of 1680	5168	Holy Check.exe	109
PID 5168 wrote to memory of 2496	5168	Holy Check.exe	111
PID 5168 wrote to memory of 2716	5168	Holy Check.exe	113
PID 5168 wrote to memory of 3620	5168	Holy Check.exe	115
PID 5168 wrote to memory of 3968	5168	Holy Check.exe	117
PID 5168 wrote to memory of 880	5168	Holy Check.exe	119
PID 5168 wrote to memory of 1620	5168	Holy Check.exe	121
PID 5168 wrote to memory of 3196	5168	Holy Check.exe	124
PID 5168 wrote to memory of 4840	5168	Holy Check.exe	126

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
- UAC bypass
- 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:5168
- 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:2628
- - 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:2052
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" delete "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:5136
- 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:2356
- C:\Windows\SYSTEM32\sc.exe
  "sc.exe" start "WindowsUpdaterDefenderMicrosoft"
  2⤵
  - Launches sc.exe
  PID:1096
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "Microsoft Compatibility Appraiser_41bce30c" /F
  2⤵
  PID:2508
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "Microsoft Compatibility Appraiser_41bce30c" /XML "C:\Users\Admin\AppData\Local\Temp\55d46217-cdb1-45ea-93a6-682825fba941.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5936
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_01371161" /F
  2⤵
  PID:2108
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_01371161" /XML "C:\Users\Admin\AppData\Local\Temp\f1c6eef1-9de4-4a53-84c7-f0ea8abb3934.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1680
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "FamilySafetyMonitor_a5dd51af" /F
  2⤵
  PID:2496
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "FamilySafetyMonitor_a5dd51af" /XML "C:\Users\Admin\AppData\Local\Temp\82d281ae-5ae2-4044-8656-1a84182dfb26.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2716
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_3513a83d" /F
  2⤵
  PID:3620
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_3513a83d" /XML "C:\Users\Admin\AppData\Local\Temp\f24b41bc-08b7-46e2-b2ae-11f622df9f93.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3968
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_04a95cf1" /F
  2⤵
  PID:880
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "NvProfileUpdaterDaily_{B2FE1952-0186-46C3-BAEC-A80AA35AC5B8}_04a95cf1" /XML "C:\Users\Admin\AppData\Local\Temp\88f19fa9-8794-4c85-94ec-87e757ce0c0d.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1620
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Delete /TN "Adobe Acrobat Update Task_7d604bd0" /F
  2⤵
  PID:3196
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /TN "Adobe Acrobat Update Task_7d604bd0" /XML "C:\Users\Admin\AppData\Local\Temp\b254d938-31cf-43dc-963b-f0fbe73138ac.xml" /F
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4840

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:5472

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Network Shortcuts\SkypeHost.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Network Shortcuts\SkypeHost.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:1300

C:\ProgramData\Microsoft\Windows\Caches\MicrosoftEdgeUpdate.exe
"C:\ProgramData\Microsoft\Windows\Caches\MicrosoftEdgeUpdate.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:5796

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

Modify Registry