Malware Analysis Report

2024-11-30 04:23

Sample ID 240613-a4vs3sxfnb
Target 2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware
SHA256 fd95c740f62347eac8babe5fc33e457a183016d029f80283e468cf7a07b3b210
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

fd95c740f62347eac8babe5fc33e457a183016d029f80283e468cf7a07b3b210

Threat Level: Shows suspicious behavior

The file 2024-06-13_9585d68fcfb844900962273117de36c6_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

2024-06-13 00:46

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 00:46

Reported

2024-06-13 00:49

Platform

win7-20240220-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_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\6ZRhtfZx7W0q8mf.exe

MD5 28cfb149af9abf155740c96991c11a57
SHA1 f14e6450a12695768865f61a283128e993d6a9b8
SHA256 7028b845c336704d335cef93f0055167c28a0b7e5dd253908ca6adbee57f3ca6
SHA512 b0bdd9534a19a87c265737ccc788a8ebf8cb875d0f386672ba00a967bfcad1f1b44ed9bbfb349448cfc572dd95c2c74ab9d3264bb955f6b2e8c1fac3f1d30a25

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 00:46

Reported

2024-06-13 00:49

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

159s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_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\2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9585d68fcfb844900962273117de36c6_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

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 8d35c70890cedae260aa13de7df3d6fb
SHA1 5abd81744e4acef3ae1fcdfa97850f2336fff03e
SHA256 00f6fb98fa997a91d9950862cd62e8aacce6cef925d79acf469a58a41a4652a9
SHA512 e6c525d3f7c0234c0199b9a2023ecb57c779d95d4450f11ddfcc5dd3dde33eb85218f5b88edd53b4be40d8c71d8b8595097c6a8cbc641b4a5b9bc9521ceed5d5

C:\Users\Admin\AppData\Local\Temp\xXo2i5VuvKiqTyF.exe

MD5 5462cc73e681a0bf44c824d23ee3cb1f
SHA1 0a86707ea941e137445eb2844733483c978c10ea
SHA256 f52502aa8290e28d7fe2a535cf775d407648ef7845b7a50c02ed62682c9a0b1e
SHA512 247014bb35caefe927fe0a6fb135ee86aa67b947495729c3099d24c050f3cd5563d1c2c35507e8f914a4c9e8fd2c361b7a2373ae7cf434ec6331a9d086b43377