Malware Analysis Report

2024-11-30 06:14

Sample ID 240612-rv4hassbpp
Target 2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware
SHA256 680ea0b10007510bf1fb7ee902a991d54af502de658fdca1d04d56466f2673da
Tags
persistence spyware stealer
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

680ea0b10007510bf1fb7ee902a991d54af502de658fdca1d04d56466f2673da

Threat Level: Shows suspicious behavior

The file 2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

Executes dropped EXE

Reads user/profile data of web browsers

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 14:31

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 14:31

Reported

2024-06-12 14:34

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe"

Signatures

Executes dropped EXE

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

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

C:\Windows\CTS.exe

MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

MD5 82b3200b536db6485d5c44062974b02e
SHA1 7262c381a95a75725366681c545c135aed19609b
SHA256 cd22a6e28f725956b0f6f91e2233fba72311344d0822a447a4de504f04a451f8
SHA512 df1695e510abb00ca417cf6cd2187c97a9a4ef04b6e4c11f971245f00cab50f063c487d2739e225bf590001219be75601d51e37e5d4817d1ba0311c0f6142d9a

C:\Users\Admin\AppData\Local\Temp\0h2Y9CgyklswQ24.exe

MD5 3c2536f8991ec3028f745d4b5fb08ed7
SHA1 f6ee54dace9c58e6c934c89030c9a9383c08969c
SHA256 0994526ab3a6ca5370d5d6a676f50bad0bbb5952d9f759bb0fdeb0c02a54ea98
SHA512 fa57acfc468a031675c750199f78e38101eba918c76f0040090d796044dad47ff1b3f169168bf71e53ab16fd2bbb40572c562d8ed68543c397858de0541e2725

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 14:31

Reported

2024-06-12 14:34

Platform

win7-20240221-en

Max time kernel

121s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe"

Signatures

Executes dropped EXE

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

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_2b23162d5b374f3e62854fc634b374a5_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

C:\Windows\CTS.exe

MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

C:\Users\Admin\AppData\Local\Temp\8WIGmRljrTtrkm9.exe

MD5 c3ab50960623d5a6fff252c459c0af69
SHA1 b4b623ef90185503f82937e8274caf0cf4308a37
SHA256 72018c687d4223308b6f7924fc52aa603c78cf9f70ee8ca8affcbaed589cedf8
SHA512 d6081d3b1f5bc7b71355e29d69a5ae654c046ab19f6b660f1483d6d145b10ed0cff6f95e22c75e011c99518ba72786af4751164262037459d9fd3a7a320fe886