Malware Analysis Report

2024-11-30 11:08

Sample ID 240612-3qe5payhpq
Target 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware
SHA256 c851f928e60b89904940b6631194cfb79973013cfae63424fed961929de265be
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

c851f928e60b89904940b6631194cfb79973013cfae63424fed961929de265be

Threat Level: Shows suspicious behavior

The file 2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

Reads user/profile data of web browsers

Executes dropped EXE

Loads dropped DLL

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

2024-06-12 23:42

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 23:42

Reported

2024-06-12 23:45

Platform

win7-20240220-en

Max time kernel

121s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_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\tDUxEbe8PEocMst.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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\tDUxEbe8PEocMst.exe

C:\Users\Admin\AppData\Local\Temp\tDUxEbe8PEocMst.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\tDUxEbe8PEocMst.exe

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

memory/2864-15-0x0000000000400000-0x000000000040D000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tDUxEbe8PEocMst.exe

MD5 67b95bddfb19a7874b5175dd08dea3ae
SHA1 4d8a69e63debb43012048bdddcdab889ddbd858f
SHA256 437b80f8d35fad3b40fab875d0faf16bbaa050ff798b5908b41dddc451cfcb8e
SHA512 3df4b665bdf387f0de928c472c11deaba317d26325de11cbcd481598e3a7f74400b89ec10443d2dbea2e30bac993b6cd57acc38fc16a0275ae7314f2f0a727e3

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 23:42

Reported

2024-06-12 23:45

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

54s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_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\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_f2ce67d38e837bcfd5590eb3ef5780f2_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.exe

C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.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

Files

C:\Users\Admin\AppData\Local\Temp\i1PlptA6jOZyx8c.exe

MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

memory/1896-9-0x0000000000400000-0x000000000040D000-memory.dmp

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

MD5 f7f844e7b91a1879ed7208049d04da83
SHA1 488bd0cde36f3bf52475122895182e5e21932341
SHA256 9ee6b1e7abfbf229de6ade1587e55fdee89676f57e8bbb1f9a730ad05060f81e
SHA512 30321023a6445ffed6e0d58015153461685fdf5f421a8f65531202b716df3b68436557f63492a8591f4074c3a5e72f55798d4dd25c959a29d2f334c91478a64f