bcd7b068992fb848fc3ba76021b3e095d0a0682c17146b4d836fa2a7846a2e0f

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"	1891a9f000924ff9afea8af30362cd90.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	1891a9f000924ff9afea8af30362cd90.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe = "0"	1891a9f000924ff9afea8af30362cd90.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
848	powershell.exe

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 12 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\reg.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe\Debugger = "\"cmd.exe\",\"C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe\""	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\reg.exe	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	1891a9f000924ff9afea8af30362cd90.exe

Executes dropped EXE 1 IoCs

pid	Process
4576	1891a9f000924ff9afea8af30362cd90.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	1891a9f000924ff9afea8af30362cd90.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions	1891a9f000924ff9afea8af30362cd90.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe = "0"	1891a9f000924ff9afea8af30362cd90.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Client.exe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\nurik.exe\" .."	nurik.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Qwe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1891a9f000924ff9afea8af30362cd90.exe"	1891a9f000924ff9afea8af30362cd90.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1537126222-899333903-2037027349-1000\Software\Microsoft\Windows\CurrentVersion\Run\Client.exe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\nurik.exe\" .."	nurik.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1891a9f000924ff9afea8af30362cd90.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
1	2.tcp.eu.ngrok.io

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	1891a9f000924ff9afea8af30362cd90.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nurik.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TASKKILL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TASKKILL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TASKKILL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TASKKILL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1891a9f000924ff9afea8af30362cd90.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nurik.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

Kills process with taskkill 5 IoCs

evasion

pid	Process
3312	TASKKILL.exe
2020	TASKKILL.exe
3460	TASKKILL.exe
3968	taskkill.exe
2940	TASKKILL.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

pid	Process
784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe
4520	nurik.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

description	pid	Process
Token: SeDebugPrivilege	4520	nurik.exe
Token: SeDebugPrivilege	2020	TASKKILL.exe
Token: SeDebugPrivilege	3460	TASKKILL.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: SeDebugPrivilege	2940	TASKKILL.exe
Token: SeDebugPrivilege	3312	TASKKILL.exe
Token: SeDebugPrivilege	4664	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: 33	4520	nurik.exe
Token: SeIncBasePriorityPrivilege	4520	nurik.exe
Token: SeBackupPrivilege	4576	1891a9f000924ff9afea8af30362cd90.exe
Token: SeRestorePrivilege	4576	1891a9f000924ff9afea8af30362cd90.exe
Token: SeDebugPrivilege	4576	1891a9f000924ff9afea8af30362cd90.exe
Token: SeDebugPrivilege	848	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 2020	4520	nurik.exe	79
PID 4520 wrote to memory of 2020	4520	nurik.exe	79
PID 4520 wrote to memory of 2020	4520	nurik.exe	79
PID 4520 wrote to memory of 3460	4520	nurik.exe	80
PID 4520 wrote to memory of 3460	4520	nurik.exe	80
PID 4520 wrote to memory of 3460	4520	nurik.exe	80
PID 4520 wrote to memory of 3968	4520	nurik.exe	85
PID 4520 wrote to memory of 3968	4520	nurik.exe	85
PID 4520 wrote to memory of 3968	4520	nurik.exe	85
PID 4520 wrote to memory of 1996	4520	nurik.exe	87
PID 4520 wrote to memory of 1996	4520	nurik.exe	87
PID 4520 wrote to memory of 1996	4520	nurik.exe	87
PID 4520 wrote to memory of 784	4520	nurik.exe	89
PID 4520 wrote to memory of 784	4520	nurik.exe	89
PID 4520 wrote to memory of 784	4520	nurik.exe	89
PID 4664 wrote to memory of 2940	4664	nurik.exe	92
PID 4664 wrote to memory of 2940	4664	nurik.exe	92
PID 4664 wrote to memory of 2940	4664	nurik.exe	92
PID 4664 wrote to memory of 3312	4664	nurik.exe	94
PID 4664 wrote to memory of 3312	4664	nurik.exe	94
PID 4664 wrote to memory of 3312	4664	nurik.exe	94
PID 4520 wrote to memory of 4576	4520	nurik.exe	96
PID 4520 wrote to memory of 4576	4520	nurik.exe	96
PID 4520 wrote to memory of 4576	4520	nurik.exe	96
PID 4576 wrote to memory of 4704	4576	1891a9f000924ff9afea8af30362cd90.exe	98
PID 4576 wrote to memory of 4704	4576	1891a9f000924ff9afea8af30362cd90.exe	98
PID 4576 wrote to memory of 848	4576	1891a9f000924ff9afea8af30362cd90.exe	99
PID 4576 wrote to memory of 848	4576	1891a9f000924ff9afea8af30362cd90.exe	99

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	1891a9f000924ff9afea8af30362cd90.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1891a9f000924ff9afea8af30362cd90.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\HideFastUserSwitching = "1"	1891a9f000924ff9afea8af30362cd90.exe

C:\Users\Admin\AppData\Local\Temp\nurik.exe
"C:\Users\Admin\AppData\Local\Temp\nurik.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Windows\SysWOW64\TASKKILL.exe
  TASKKILL /F /IM wscript.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\SysWOW64\TASKKILL.exe
  TASKKILL /F /IM cmd.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3460
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /f im Wireshark.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  PID:3968
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /delete /tn "MicrosoftEdgeUpdateTaskMachine" /f
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1996
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /sc minute /mo 1 /tn "MicrosoftEdgeUpdateTaskMachine" /tr C:\Users\Admin\AppData\Local\Temp\nurik.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:784
- C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe
  "C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe"
  2⤵
  - UAC bypass
  - Windows security bypass
  - Event Triggered Execution: Image File Execution Options Injection
  - Executes dropped EXE
  - Windows security modification
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:4576
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "GoogleUpdateTaskMachineUK" /sc MINUTE /mo 1 /tr "C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe" /rl HIGHEST /f
    3⤵
    PID:4704
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1891a9f000924ff9afea8af30362cd90.exe'"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of AdjustPrivilegeToken
    PID:848

C:\Users\Admin\AppData\Local\Temp\nurik.exe
C:\Users\Admin\AppData\Local\Temp\nurik.exe
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\SysWOW64\TASKKILL.exe
  TASKKILL /F /IM wscript.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Windows\SysWOW64\TASKKILL.exe
  TASKKILL /F /IM cmd.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3312

C:\Windows\explorer.exe
explorer.exe
1⤵
PID:3508

Network

DNS

2.tcp.eu.ngrok.io

nurik.exe

Remote address:

8.8.8.8:53

Request

2.tcp.eu.ngrok.io

IN A

Response

2.tcp.eu.ngrok.io

IN A

18.157.68.73
DNS

8.8.8.8.in-addr.arpa

nurik.exe

Remote address:

8.8.8.8:53

Request

8.8.8.8.in-addr.arpa

IN PTR

Response

8.8.8.8.in-addr.arpa

IN PTR

dnsgoogle
DNS

73.68.157.18.in-addr.arpa

nurik.exe

Remote address:

8.8.8.8:53

Request

73.68.157.18.in-addr.arpa

IN PTR

Response

73.68.157.18.in-addr.arpa

IN PTR

ec2-18-157-68-73eu-central-1compute amazonawscom
DNS

nexusrules.officeapps.live.com

nurik.exe

Remote address:

8.8.8.8:53

Request

nexusrules.officeapps.live.com

IN A

Response

nexusrules.officeapps.live.com

IN CNAME

prod.nexusrules.live.com.akadns.net

prod.nexusrules.live.com.akadns.net

IN A

52.111.229.48
DNS

48.229.111.52.in-addr.arpa

nurik.exe

Remote address:

8.8.8.8:53

Request

48.229.111.52.in-addr.arpa

IN PTR

Response

18.157.68.73:18445

2.tcp.eu.ngrok.io

nurik.exe

23.7kB
742.4kB
426
787
18.157.68.73:18445

2.tcp.eu.ngrok.io

nurik.exe

195.8kB
5.2kB
171
126

8.8.8.8:53

2.tcp.eu.ngrok.io

dns

nurik.exe

348 B
604 B
5
5

DNS Request

2.tcp.eu.ngrok.io

DNS Response

18.157.68.73

DNS Request

8.8.8.8.in-addr.arpa

DNS Request

73.68.157.18.in-addr.arpa

DNS Request

nexusrules.officeapps.live.com

DNS Response

52.111.229.48

DNS Request

48.229.111.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Pre-OS Boot

T1542

Bootkit

T1542.003

Scheduled Task/Job

T1053

Scheduled Task

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

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

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 Tools

Modify Registry