Malware Analysis Report

2025-06-15 20:09

Sample ID 240602-stl3asfe7w
Target 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware
SHA256 a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18
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

a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18

Threat Level: Shows suspicious behavior

The file 2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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

2024-06-02 15:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-02 15:25

Reported

2024-06-02 15:27

Platform

win7-20240215-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\pxEJfDcl0SBDTGw.exe

MD5 9d350bc5dfdc3ade3a787754cafec2c5
SHA1 501ea7deed824b41b6674d6ce26563338ad69898
SHA256 dd2e9a5b01e848b3ba43115b6f034a265ac95b79623a81a89e6bc87f430bf9bd
SHA512 7010523ee729f8693cf9285f8cea0b3cb5ad3a47fb649d722b9f8a3033a34313004f8afd4cba620656fa68b4e21531dc5b73f1041d3b7be6c34b26ece9c5b8df

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 15:25

Reported

2024-06-02 15:27

Platform

win10v2004-20240508-en

Max time kernel

129s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 31.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.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 61dfdc4e999808f8e58a5b68c20f5c63
SHA1 5dab229d7878e2dfa43073ce61cd6c73d8250877
SHA256 9fb6144c404888a795685f68b3f8ceff1feccec67516e711e3590e9719c3cfd9
SHA512 e9a3b2525bc6a74198189d7d0ddbdb3e9dcb500623794f8af49b72bfc127b47fac8b1a89997e31e1ead3f96b30162983d3d9ccc54a1eac0ebe74fb020476fc08

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

MD5 a8a35f0759bb26a32b8ebeaf36b7f36b
SHA1 0b3be30a844a009c8f4ee46470b92cc84c72452e
SHA256 ae1521458e125778a35f8ffd4d14a76146398cbc69ace2213e5b91e3fd600028
SHA512 a871170e77864119ac44681a6d3c6d31d1be55b0d99d1f5e64b0d9d4739d723744033a7d96ee5147e3d50ed1e027337fd42032d4d4df12b2ec431f5c0d767672