Malware Analysis Report

2024-11-30 06:37

Sample ID 240612-wm4wbayalm
Target 2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware
SHA256 3180ad517578b8327517e020661dd02304e534181496344dedbca86f4290e180
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

3180ad517578b8327517e020661dd02304e534181496344dedbca86f4290e180

Threat Level: Shows suspicious behavior

The file 2024-06-12_a025e29726722d69fea098d6f481bb85_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 AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 18:03

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 18:03

Reported

2024-06-12 18:05

Platform

win7-20240221-en

Max time kernel

121s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.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_a025e29726722d69fea098d6f481bb85_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_a025e29726722d69fea098d6f481bb85_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_a025e29726722d69fea098d6f481bb85_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exe

C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exe

MD5 e97c622b03fb2a2598bf019fbbe29f2c
SHA1 32698bd1d3a0ff6cf441770d1b2b816285068d19
SHA256 5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
SHA512 db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

C:\Windows\CTS.exe

MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

C:\Users\Admin\AppData\Local\Temp\95wFoU3S4siUM3X.exe

MD5 a33fff9ccf410f818d2a7fdd67da07a6
SHA1 3d7225c264ae7e88b7932c2c37f40048e8be375b
SHA256 f2af3ae853de1847178215797f8bc5d7c3a585bc39adaa883bc5d99bf3b7b9e0
SHA512 76400809858c23867da039c443910c3e6b30e4275f0396fa4233366eb7d0cbd3b36e0e8f7ded9970a961ba6dfd26c7e8fa5879996a257390d66578b296b02f07

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 18:03

Reported

2024-06-12 18:05

Platform

win10v2004-20240611-en

Max time kernel

120s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.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_a025e29726722d69fea098d6f481bb85_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_a025e29726722d69fea098d6f481bb85_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_a025e29726722d69fea098d6f481bb85_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_a025e29726722d69fea098d6f481bb85_bkransomware.exe"

C:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.exe

C:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.exe

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 211.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\JkfkgHiRPkUL63l.exe

MD5 e97c622b03fb2a2598bf019fbbe29f2c
SHA1 32698bd1d3a0ff6cf441770d1b2b816285068d19
SHA256 5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
SHA512 db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

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 6c6a5a95342dfc8a526e61b63ec53d08
SHA1 eabd99474e7191133366827b2cf6539b581f3734
SHA256 45e826c28fc9888c033b18f7d373fda0d5a8b073a605b6ea3f7f2e7e5854019e
SHA512 d11e39916204c1579b59d4f13ca57ef75cc038afafb482304774e2019267b9f37504cd3ee8abc0a0d84bb7bd850097fa808c587ae656a57fbf419552f4eb18b9