Malware Analysis Report

2025-06-15 20:03

Sample ID 240530-3cam2seg82
Target 2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware
SHA256 e75499cde0fb6d99a85ec69640e10101d83c5f71c71568dcb5cc83742ccaef34
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

e75499cde0fb6d99a85ec69640e10101d83c5f71c71568dcb5cc83742ccaef34

Threat Level: Shows suspicious behavior

The file 2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

Executes dropped EXE

Loads dropped DLL

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

2024-05-30 23:21

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-30 23:21

Reported

2024-05-30 23:24

Platform

win7-20231129-en

Max time kernel

117s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\CTS.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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:\Windows\CTS.exe N/A
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe

C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

memory/320-15-0x0000000000400000-0x000000000040D000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe

MD5 6606015e8d0759af714241d4ab6a82da
SHA1 9d83a08910a66a630e8768c5eb7dd12fe0db152b
SHA256 01ff41497b28bf95668e61fd66762dc5434d3c560e665cdf8ae6071635a4e629
SHA512 125e8fe17ddc2cf7052a1bd9977989a3ed7c6e26b9177f332815299cfaa37697f5dde06d4d7ce9ae3d788deeac04923d87557a6c9c09d2e7747c8d6cfc682fdc

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-30 23:21

Reported

2024-05-30 23:24

Platform

win10v2004-20240426-en

Max time kernel

94s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"

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

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

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

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

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

memory/1512-9-0x0000000000400000-0x000000000040D000-memory.dmp

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

MD5 46c2375504b8692da9c7967dbe0095a8
SHA1 613aac0889ec5564ea176ec55fb18c62ac1bcd32
SHA256 5022c8a9fd7925bd5487920504a22f6f240339fe7640131d8d071b65e7f1a851
SHA512 31ea007cc95ce336e3b05a236e69429887881ec22bb9d8f196eeca15197b25a930d57f4d160d64391d55046d72bff0e04ec19f0497d00db0bb524fd350eff9a5