Malware Analysis Report

2024-11-30 06:56

Sample ID 240601-jat45adh7v
Target 2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware
SHA256 d3cd85600b045f6836092c4494021a0b3a25324b85acf05a0154cc31e7742d77
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

d3cd85600b045f6836092c4494021a0b3a25324b85acf05a0154cc31e7742d77

Threat Level: Shows suspicious behavior

The file 2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

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

2024-06-01 07:28

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 07:28

Reported

2024-06-01 07:30

Platform

win7-20240221-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

C:\Users\Admin\AppData\Local\Temp\yVjR22jfPW6zhuA.exe

MD5 bb610ebde5ec16369b88631e32666b93
SHA1 f64d90288882612f0ddb49eedbe51198689c0818
SHA256 194f79d8a375f8517f392202f29761ba61667f009ed9bae8ee25dcc5e4871577
SHA512 872daa185ecc86135a19fc17366a824da842c9faec3f8e2d7780127bd7d3b56a8134fba641c97fe6b49c89f2cd7505a4cdbc6a793b652b8fa2740e14fc2b62df

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-01 07:28

Reported

2024-06-01 07:30

Platform

win10v2004-20240426-en

Max time kernel

93s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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

MD5 fc3eb925b60d3eca3c6714841a70d8aa
SHA1 872a2e8e8e6107d40b292ddae4742097f3c64834
SHA256 adea8cc41d5f28664fed79e3ecba17ada669e2e0eee1e20bbc443ea07e53588c
SHA512 56d68000b78d2f52e101405b2b68c75e0d9aa31e9f4438659c5a06a3176c13d4473fe69469dfbe95b6139b996f573cfeba22934e697b4cdca042c7269584b6c6

C:\Users\Admin\AppData\Local\Temp\n39yOFdrAAjU2I3.exe

MD5 9bf20c1fce7bf3e30dac2617907e4d49
SHA1 73ffd9575dc86f27175e583dc5a83d7f9a6031bd
SHA256 f290f69291ab2826262454d840d0cbc44c94d9fa1f11628a45842f7a0dbad16e
SHA512 e9c70304f68c394328feff3ef3625b78a0e6fed2c97359f670fe2e49b654ca1f662be8f51e555e8d2d207029d6757491509f57a3dc5cb49e14c31445a619ee9c