Malware Analysis Report

2024-09-11 07:16

Sample ID 240529-sp351sac7s
Target Clutt6.6.6.exe
SHA256 bce721a6081d418d0e00bce7dfb5a6b957767b0138690f7e5d642181556b8296
Tags
bootkit discovery evasion exploit persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bce721a6081d418d0e00bce7dfb5a6b957767b0138690f7e5d642181556b8296

Threat Level: Known bad

The file Clutt6.6.6.exe was found to be: Known bad.

Malicious Activity Summary

bootkit discovery evasion exploit persistence

Modifies WinLogon for persistence

Possible privilege escalation attempt

Disables Task Manager via registry modification

Disables RegEdit via registry modification

Checks computer location settings

Modifies file permissions

Writes to the Master Boot Record (MBR)

Drops file in Program Files directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-05-29 15:18

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-29 15:18

Reported

2024-05-29 15:21

Platform

win7-20231129-en

Max time kernel

150s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "satan" C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Disables RegEdit via registry modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Disables Task Manager via registry modification

evasion

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Temp\plg.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\mirror_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\crossHD_small.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\tunnel.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\crossHD_medium.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_short.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\rainbow_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\static_color.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\stretch.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_edit.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\clutterus_ico.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\invert_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
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N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2060 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe C:\Windows\System32\cmd.exe
PID 2060 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe C:\Windows\System32\cmd.exe
PID 2060 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe C:\Windows\System32\cmd.exe
PID 2592 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2652 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2668 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2668 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2668 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2572 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2572 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2572 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2704 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2704 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2704 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 2664 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2664 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 2664 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\takeown.exe
PID 2592 wrote to memory of 3040 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 3040 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe
PID 2592 wrote to memory of 3040 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\icacls.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe

"C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant "%username%:F" && takeown /f C:\Windows\System32\drivers && icacls C:\Windows\System32\drivers /grant "%username%:F" && takeown /f C:\Windows\System32\Boot && icacls C:\Windows\System32\Boot /grant "%username%:F" && exit

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32 /grant "Admin:F"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32\drivers

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\drivers /grant "Admin:F"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32\Boot

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\Boot /grant "Admin:F"

C:\Windows\system32\wbem\WMIADAP.EXE

wmiadap.exe /F /T

Network

N/A

Files

memory/2060-0-0x000007FEF56E3000-0x000007FEF56E4000-memory.dmp

memory/2060-1-0x00000000001A0000-0x0000000000630000-memory.dmp

memory/2060-2-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

memory/2060-3-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

memory/2060-4-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

memory/2060-18-0x000007FEF56E3000-0x000007FEF56E4000-memory.dmp

memory/2060-19-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

memory/2060-23-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

memory/2060-24-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-29 15:18

Reported

2024-05-29 15:21

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

134s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "satan" C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Disables RegEdit via registry modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Disables Task Manager via registry modification

evasion

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Temp\crossHD_medium.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\stretch.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\clutterus_ico.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\invert_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\static_color.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\crossHD_small.ico C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\mirror_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\plg.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\rainbow_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_edit.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_snd.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\tunnel.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
File opened for modification C:\Program Files\Temp\wind_short.wav C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
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N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\takeown.exe N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe

"C:\Users\Admin\AppData\Local\Temp\Clutt6.6.6.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant "%username%:F" && takeown /f C:\Windows\System32\drivers && icacls C:\Windows\System32\drivers /grant "%username%:F" && takeown /f C:\Windows\System32\Boot && icacls C:\Windows\System32\Boot /grant "%username%:F" && exit

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32 /grant "Admin:F"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32\drivers

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\drivers /grant "Admin:F"

C:\Windows\system32\takeown.exe

takeown /f C:\Windows\System32\Boot

C:\Windows\system32\icacls.exe

icacls C:\Windows\System32\Boot /grant "Admin:F"

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x324 0x4ec

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.244.122.92.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 32.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/3524-0-0x00007FFA2B193000-0x00007FFA2B195000-memory.dmp

memory/3524-1-0x0000000000040000-0x00000000004D0000-memory.dmp

memory/3524-2-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp

memory/3524-19-0x00007FFA2B193000-0x00007FFA2B195000-memory.dmp

memory/3524-20-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp