Malware Analysis Report

2025-03-15 00:56

Sample ID 240626-k148fszckn
Target 2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware
SHA256 0b0e7a323aa3bc9fee28a86dfefd7f51397fd614aca5291313197eeb91a3c25a
Tags
defense_evasion discovery persistence
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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
8/10

SHA256

0b0e7a323aa3bc9fee28a86dfefd7f51397fd614aca5291313197eeb91a3c25a

Threat Level: Likely malicious

The file 2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware was found to be: Likely malicious.

Malicious Activity Summary

defense_evasion discovery persistence

Sets service image path in registry

Impair Defenses: Safe Mode Boot

Checks installed software on the system

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of FindShellTrayWindow

Suspicious behavior: LoadsDriver

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-26 09:05

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-26 09:04

Reported

2024-06-26 09:07

Platform

win7-20240221-en

Max time kernel

118s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe"

Signatures

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\La9eEf\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\La9eEf.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\kEvP64\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\kEvP64.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\7JbDP3\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\7JbDP3.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Impair Defenses: Safe Mode Boot

defense_evasion
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\La9eEf.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\La9eEf.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\7JbDP3.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\7JbDP3.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\7JbDP3.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\La9eEf.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Checks installed software on the system

discovery

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe"

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\La9eEf.sys

MD5 7e7e3f5532b6af24dcc252ac4b240311
SHA1 3ccf1f3ac636a5e21b39ede48ff49fa23e05413f
SHA256 8e6363a6393eb4234667c6f614b2072e33512866b3204f8395bbe01530d63f2f
SHA512 92858391b4dc4c3c87124020d47dc1aea6a2939b1dcaa2d55c6b3bca69ee76d9043aca8b24d13fbac49424424707876eea2aa893ab4a18fe78e6d3a95cd4a488

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-26 09:04

Reported

2024-06-26 09:07

Platform

win10v2004-20240611-en

Max time kernel

132s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe"

Signatures

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\kEvP64\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\kEvP64.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\1BF9CN\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\1BF9CN.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vLRa1Q\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\vLRa1Q.sys" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Impair Defenses: Safe Mode Boot

defense_evasion
Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\1BF9CN.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\vLRa1Q.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\vLRa1Q.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\vLRa1Q.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\kEvP64.sys\ = "Driver" C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\1BF9CN.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A
Key deleted \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\1BF9CN.sys C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Checks installed software on the system

discovery

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-26_95013f1489e4b4c929193ea1f36c5ba0_bkransomware.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 80.90.14.23.in-addr.arpa udp
US 13.107.21.237:443 g.bing.com tcp
BE 23.41.178.27:443 www.bing.com tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 27.178.41.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\vLRa1Q.sys

MD5 7e7e3f5532b6af24dcc252ac4b240311
SHA1 3ccf1f3ac636a5e21b39ede48ff49fa23e05413f
SHA256 8e6363a6393eb4234667c6f614b2072e33512866b3204f8395bbe01530d63f2f
SHA512 92858391b4dc4c3c87124020d47dc1aea6a2939b1dcaa2d55c6b3bca69ee76d9043aca8b24d13fbac49424424707876eea2aa893ab4a18fe78e6d3a95cd4a488