Malware Analysis Report

2024-10-16 03:28

Sample ID 220123-q9extagah6
Target 6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.7z
SHA256 df480deb191b335dcbc3d4fc5d59594cb38caee2aaef8d877fbbc573de741301
Tags
avoslocker ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

df480deb191b335dcbc3d4fc5d59594cb38caee2aaef8d877fbbc573de741301

Threat Level: Known bad

The file 6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.7z was found to be: Known bad.

Malicious Activity Summary

avoslocker ransomware

Avoslocker Ransomware

Modifies extensions of user files

Drops file in Windows directory

Suspicious use of SetWindowsHookEx

Modifies data under HKEY_USERS

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-01-23 13:57

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-23 13:57

Reported

2022-01-23 13:57

Platform

win10-en-20211208

Max time kernel

15s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe"

Signatures

Avoslocker Ransomware

ransomware avoslocker

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\LimitConvert.crw => C:\Users\Admin\Pictures\LimitConvert.crw.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File renamed C:\Users\Admin\Pictures\ConvertFromInitialize.raw => C:\Users\Admin\Pictures\ConvertFromInitialize.raw.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File renamed C:\Users\Admin\Pictures\CompressUnblock.crw => C:\Users\Admin\Pictures\CompressUnblock.crw.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File opened for modification C:\Users\Admin\Pictures\JoinResolve.tiff C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File renamed C:\Users\Admin\Pictures\HideSwitch.raw => C:\Users\Admin\Pictures\HideSwitch.raw.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File renamed C:\Users\Admin\Pictures\JoinResolve.tiff => C:\Users\Admin\Pictures\JoinResolve.tiff.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File opened for modification C:\Users\Admin\Pictures\MountBlock.tiff C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A
File renamed C:\Users\Admin\Pictures\MountBlock.tiff => C:\Users\Admin\Pictures\MountBlock.tiff.avos2 C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\rescache\_merged\421858948\3551649488.pri C:\Windows\system32\LogonUI.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 C:\Windows\system32\LogonUI.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\LogonUI.exe N/A
N/A N/A C:\Windows\system32\LogonUI.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe

"C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe"

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x0 /state0:0xa3ad5055 /state1:0x41c64e6d

Network

Files

N/A