Malware Analysis Report

2024-11-30 06:43

Sample ID 240604-by2vwahd74
Target 2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware
SHA256 8152609628a931b34f46ecd418564db51fdd8e8fda8fccb6d7b01361aaa7bc08
Tags
persistence spyware stealer
score
7/10

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
7/10

SHA256

8152609628a931b34f46ecd418564db51fdd8e8fda8fccb6d7b01361aaa7bc08

Threat Level: Shows suspicious behavior

The file 2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

Loads dropped DLL

Reads user/profile data of web browsers

Executes dropped EXE

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

2024-06-04 01:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-04 01:33

Reported

2024-06-04 01:36

Platform

win7-20240221-en

Max time kernel

120s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe N/A
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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe

C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

memory/2076-9-0x0000000000400000-0x000000000040D000-memory.dmp

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe

MD5 809665a97260e903a89b05f9ac340ad6
SHA1 1c18ec299e0ef066cc40e368cf51e8175915a4c3
SHA256 d0eb062437846f29bb371bf751e001fc8b4da79f69c1e93a91d91a367312231e
SHA512 e85bce43d1c0e0cbd4115d8de361eead351cbb3c58a4c2d4693766e0a23bae38398b73b2c7197963eeab843cb0a9544bc76d801b2caa2d60abd0205aad7d0cdb

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-04 01:33

Reported

2024-06-04 01:36

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe N/A
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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe

C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.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
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

memory/4804-10-0x0000000000400000-0x000000000040D000-memory.dmp

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

MD5 c60f9456db925e4da7ad0085314eebc0
SHA1 9fda8530d1bc921e8ba541766f88183403a58a63
SHA256 d854bd690ac50f6285b8d8ec79fdb8dd91fb75bd991f3f6e6b1c9e4f107691e8
SHA512 e0010e24db392a73f5ec4d0eb91ab64977f1c60faa9b4d695111e47f18c9613e191b673a11b684e0dbce0ca901b3f594fed473fea6c1558d27f157a3660e6bb4