Malware Analysis Report

2024-09-23 11:24

Sample ID 240614-yf17ystapb
Target 2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike
SHA256 af487c1d408b6b2f3022581783b217f170670ee9eedb36980cf9d8ae6fc68757
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

af487c1d408b6b2f3022581783b217f170670ee9eedb36980cf9d8ae6fc68757

Threat Level: Shows suspicious behavior

The file 2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_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)

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-14 19:44

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 19:44

Reported

2024-06-14 19:47

Platform

win7-20231129-en

Max time kernel

120s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_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\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_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\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Internet Explorer\BrowserMachineCode C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Internet Explorer\BrowserMachineCode\MachineGuid = "C631B55276572262759DA4D4D6183E65" C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 pcwup.imtt.qq.com udp
CN 183.47.104.158:80 pcwup.imtt.qq.com tcp
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 wup.browser.qq.com udp
HK 129.226.107.80:443 wup.browser.qq.com tcp
US 8.8.8.8:53 www.microsoft.com udp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 19:44

Reported

2024-06-14 19:47

Platform

win10v2004-20240611-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_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\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_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\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\SOFTWARE\Microsoft\Internet Explorer\BrowserMachineCode\MachineGuid = "16F5281E1992E32DF3445F0702B9A428" C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A
Key created \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Software\Microsoft\Internet Explorer\BrowserMachineCode C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_0de45250f60970b400bb0ab2b2b5a7c1_avoslocker_cobalt-strike.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 101.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 pcwup.imtt.qq.com udp
CN 183.47.104.158:80 pcwup.imtt.qq.com tcp
CN 183.47.126.106:80 pcwup.imtt.qq.com tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
CN 14.22.9.100:80 pcwup.imtt.qq.com tcp
US 8.8.8.8:53 71.121.18.2.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 8.8.8.8:53 197.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

N/A