Malware Analysis Report

2024-11-30 06:32

Sample ID 240612-r63edasfrk
Target 2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_bkransomware
SHA256 e9d4a0307838e6b5ac8e50a0fa0624befc513c92a7c9330a1171cea6f10f580a
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

e9d4a0307838e6b5ac8e50a0fa0624befc513c92a7c9330a1171cea6f10f580a

Threat Level: Shows suspicious behavior

The file 2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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

2024-06-12 14:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 14:49

Reported

2024-06-12 14:51

Platform

win7-20240508-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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_ae7c77471de7d46862e8c38e1fcbe924_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_ae7c77471de7d46862e8c38e1fcbe924_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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\DtLJWzcMyadjgna.exe

MD5 4fe9a3bb39a01f0af77ebe99f71fa966
SHA1 bd5c36f54cadbf115cc626b94dc5330e41380ef1
SHA256 e68d9d604b3ebbb5892fbaf8368f77faef069fce0e51dd345853c3fbbd2edac6
SHA512 862282ed723abcca367628a90861ac9fb49122cfbc3bcaf1f322dbb8b4a6cd0faf75d045ee9b46127b2ca164f944b30e774ffa6f3aee8ebb6780068b88116110

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 14:49

Reported

2024-06-12 14:51

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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_ae7c77471de7d46862e8c38e1fcbe924_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_ae7c77471de7d46862e8c38e1fcbe924_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ae7c77471de7d46862e8c38e1fcbe924_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

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 026d3a83210eef774fb58c5102fd0ebc
SHA1 9698113ed1c313c2fad3c6739cb7a9c0bea52ef7
SHA256 db492123fb59ea45e15aeb88fc410be9ed38af06c9e955272ff0c76cf09bd48e
SHA512 cc24ca082d851ccd097462994a3fffd3c3cf439884401c97dbf5654e1e3eb5e0b37356428713b07d9e6471b4a4e503e67522aa85f709a538168ed1ab39bbbb55

C:\Users\Admin\AppData\Local\Temp\9RWcVUWq2Ds33td.exe

MD5 c3699b71eaedc0fb16155f2227ff5764
SHA1 694b9a44f764438413519b6694c1ac50b0715a90
SHA256 a4356a87279462e2645d27ffd4c328ff01b977eeb7a0536217b611a887a06c85
SHA512 0b1fe71509664b949400a4e76f2004eccaa3d37d7cf5de3bfa6f238f89793c3ea7e60196120a46518976918d84700b3717bb1f493c825da90530439810cca2e8