Malware Analysis Report

2024-11-30 06:53

Sample ID 240601-jjsmnafb69
Target 2024-06-01_948fc3db93f39956720672a129137317_bkransomware
SHA256 460b7f1e0a91b9c5ab96217d923d2f164b439fbbfac76e1245ca8d08ebe47216
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

460b7f1e0a91b9c5ab96217d923d2f164b439fbbfac76e1245ca8d08ebe47216

Threat Level: Shows suspicious behavior

The file 2024-06-01_948fc3db93f39956720672a129137317_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 WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-01 07:42

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 07:42

Reported

2024-06-01 07:44

Platform

win7-20240221-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe N/A
N/A N/A C:\Windows\CTS.exe N/A
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe N/A
N/A N/A N/A 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_948fc3db93f39956720672a129137317_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_948fc3db93f39956720672a129137317_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_948fc3db93f39956720672a129137317_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe

C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\ninD33EgF6sDXxd.exe

MD5 0655a0af4a2ff9bf591f614ba8f5721f
SHA1 b10d53dccec179109aff61b86ecca65be816f3c4
SHA256 d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32
SHA512 9051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-01 07:42

Reported

2024-06-01 07:44

Platform

win10v2004-20240226-en

Max time kernel

145s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.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\2024-06-01_948fc3db93f39956720672a129137317_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_948fc3db93f39956720672a129137317_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_948fc3db93f39956720672a129137317_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-01_948fc3db93f39956720672a129137317_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.exe

C:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4048 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
GB 96.16.110.114:80 tcp
US 8.8.8.8:53 20.160.190.20.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 13.107.253.64:443 tcp
US 8.8.8.8:53 56.94.73.104.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 142.250.187.202:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 202.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 90.16.208.104.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\KKAs03FUKDjWfJb.exe

MD5 0655a0af4a2ff9bf591f614ba8f5721f
SHA1 b10d53dccec179109aff61b86ecca65be816f3c4
SHA256 d1a473a0dd813bd3565b810dcb8ff8bc7907478a994c564d55200925894e0d32
SHA512 9051043e6711b1f1b73f4137a8e4c16362c6be5d6c01b15f0430920ce096adf0b9f6a344462aadc5c2847ab5c0d9682df13803351449462dc5dda6059319d45f

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 b23cdfcf9b0015c42cbd20381fb13a60
SHA1 658ac2c6b8daa3bf3564883ca9c6fafabc78dd97
SHA256 0620943920a63ac48ddb5309e5480b85343778ef21cc182e56f46b010585010a
SHA512 93a5eacedda5bfc6c3a865aee0f452b2409d565625eacaa777e4d9a089d28746d143036dedb16b0a52522ff2e46ffa9bc3cf1a501cf6e76a13fcd464458d26f5