Malware Analysis Report

2024-09-23 13:20

Sample ID 240612-z9kmqs1cjg
Target 2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike
SHA256 ba0f56e91b3361a0e8af4ab9cbcdb73a96fa5f63ced325a6591cef180b1fec7e
Tags
bootkit evasion persistence trojan
score
6/10

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
6/10

SHA256

ba0f56e91b3361a0e8af4ab9cbcdb73a96fa5f63ced325a6591cef180b1fec7e

Threat Level: Shows suspicious behavior

The file 2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit evasion persistence trojan

Checks whether UAC is enabled

Writes to the Master Boot Record (MBR)

Unsigned PE

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-12 21:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 21:25

Reported

2024-06-12 21:27

Platform

win7-20240611-en

Max time kernel

119s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe"

Signatures

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.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\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Internet Explorer\SEBrowserMachineCode C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Internet Explorer\SEBrowserMachineCode\MachineGuid = "A8FBC50E85B5F84390AE9CB09AC4AC5C" C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 pcwup.imtt.qq.com udp
CN 14.22.9.100:80 pcwup.imtt.qq.com tcp
CN 183.47.104.158:80 pcwup.imtt.qq.com tcp
CN 183.47.126.106:80 pcwup.imtt.qq.com tcp
US 8.8.8.8:53 wup.browser.qq.com udp
HK 129.226.106.211:443 wup.browser.qq.com tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 21:25

Reported

2024-06-12 21:27

Platform

win10v2004-20240611-en

Max time kernel

124s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe"

Signatures

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.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\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Software\Microsoft\Internet Explorer\SEBrowserMachineCode C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Internet Explorer\SEBrowserMachineCode\MachineGuid = "6610E90D634A0A3204D4C9E6CA5A9420" C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_170e0e901546270b7ae38cda8b604329_avoslocker_cobalt-strike.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4416,i,4778049104057176787,6631751660692402210,262144 --variations-seed-version --mojo-platform-channel-handle=1424 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 pcwup.imtt.qq.com udp
CN 183.47.126.106:80 pcwup.imtt.qq.com tcp
CN 14.22.9.100:80 pcwup.imtt.qq.com tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
NL 52.111.243.30:443 tcp
CN 183.47.104.158:80 pcwup.imtt.qq.com tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 wup.browser.qq.com udp
HK 129.226.107.80:443 wup.browser.qq.com tcp
US 8.8.8.8:53 80.107.226.129.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp

Files

N/A