f1bbcc5c678d174d858ae089f4494e3ea8bcfc418098d61804a15e437f08aff7

Target

[email protected]
Size

48KB
MD5

21943d72b0f4c2b42f242ac2d3de784c
SHA1

c887b9d92c026a69217ca550568909609eec1c39
SHA256

2d047b0a46be4da59d375f71cfbd578ce1fbf77955d0bb149f6be5b9e4552180
SHA512

04c9fa8358944d01b5fd0b6d5da2669df4c54fe79c58e7987c16bea56c114394173b6e8a6ac54cd4acd081fcbc66103ea6514c616363ba8d212db13b301034d8

Score

8^/10

bootkit persistence ransomware

Malware Config

Signatures

Modifies WinLogon to allow AutoLogon 2 TTPs 1 IoCs

Enables rebooting of the machine without requiring login credentials.

ransomware bootkit

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked	LogonUI.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\2503326475 = "C:\\Users\\Admin\\2503326475\\2503326475.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\2503326475_del = "cmd /c del \"C:\\Users\\Admin\\AppData\\Local\\Temp\\[email protected]\""	reg.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4232	wlrmdr.exe
4232	wlrmdr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3396	shutdown.exe
Token: SeRemoteShutdownPrivilege	3396	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4232	wlrmdr.exe
1384	LogonUI.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4720 wrote to memory of 3396	4720	[email protected]	74
PID 4720 wrote to memory of 3396	4720	[email protected]	74
PID 4720 wrote to memory of 3396	4720	[email protected]	74
PID 4720 wrote to memory of 3664	4720	[email protected]	75
PID 4720 wrote to memory of 3664	4720	[email protected]	75
PID 4720 wrote to memory of 3664	4720	[email protected]	75
PID 4720 wrote to memory of 748	4720	[email protected]	79
PID 4720 wrote to memory of 748	4720	[email protected]	79
PID 4720 wrote to memory of 748	4720	[email protected]	79
PID 3664 wrote to memory of 4244	3664	cmd.exe	82
PID 3664 wrote to memory of 4244	3664	cmd.exe	82
PID 3664 wrote to memory of 4244	3664	cmd.exe	82
PID 748 wrote to memory of 3156	748	cmd.exe	83
PID 748 wrote to memory of 3156	748	cmd.exe	83
PID 748 wrote to memory of 3156	748	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\[email protected]
"C:\Users\Admin\AppData\Local\Temp\[email protected]"
1⤵
- Suspicious use of WriteProcessMemory
PID:4720
- C:\Windows\SysWOW64\shutdown.exe
  "C:\Windows\System32\shutdown.exe" /r /t 6 /f
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v 2503326475 /t REG_SZ /d "C:\Users\Admin\2503326475\2503326475.exe" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3664
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v 2503326475 /t REG_SZ /d "C:\Users\Admin\2503326475\2503326475.exe" /f
    3⤵
    - Adds Run key to start application
    PID:4244
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce /v 2503326475_del /t REG_SZ /d "cmd /c del \"C:\Users\Admin\AppData\Local\Temp\[email protected]\"" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:748
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce /v 2503326475_del /t REG_SZ /d "cmd /c del \"C:\Users\Admin\AppData\Local\Temp\[email protected]\"" /f
    3⤵
    - Adds Run key to start application
    PID:3156

C:\Windows\system32\wlrmdr.exe
-s -1 -f 2 -t You're about to be signed out -m Windows will shut down in less than a minute. -a 3
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4232

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3acf855 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1384

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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