Analysis Overview
SHA256
ab49232d37cff2674e72ca2edce8c52ffc0cccbee6dcefedd4398bec6a7ab94b
Threat Level: Shows suspicious behavior
The file 2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
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
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-03 06:45
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 06:45
Reported
2024-06-03 06:47
Platform
win7-20240220-en
Max time kernel
121s
Max time network
122s
Command Line
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
Adds Run key to start application
| 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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2852 wrote to memory of 2928 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2852 wrote to memory of 2928 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2852 wrote to memory of 2928 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2852 wrote to memory of 2928 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Temp\I9gzmfTSvIokLFF.exe
| MD5 | aad96f2f3f82590ce6d8395063116ab6 |
| SHA1 | 509be6f1e1379736b6d6fec7e9dfdab02b811354 |
| SHA256 | c6c6d1b5c09f25bc351c9a4e171ca8d0eef802317145962c3950e7f9d40453ab |
| SHA512 | 866d73d832ed8910e8805bf3c6865ead52245d9521ea5ca3650a744e000c15c9785a775f53d1bb9d60e8053e02b9dae777ed0245f1776b440d8aef9445c5032b |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 06:45
Reported
2024-06-03 06:47
Platform
win10v2004-20240508-en
Max time kernel
133s
Max time network
102s
Command Line
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
Adds Run key to start application
| 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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_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\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4812 wrote to memory of 2296 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
| PID 4812 wrote to memory of 2296 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
| PID 4812 wrote to memory of 2296 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_ca150b2046f2a48fd412bd097c113b34_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 |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 133.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.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 | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 28b88a88841ab38e1bb52a781b4f3fd7 |
| SHA1 | 3c99ffc714139a2e658e67693415d579d1aa493f |
| SHA256 | 96fc88096cd33bb8c471b330dfe40eb3104d83812b17d71c63716af97c6f142b |
| SHA512 | 258b889094a4dd3af6375b4f329f36e0b2c24c412e4dd715af6cb628c725b946638d38ee0d5c5aab56088a7c288edb3f7cf22a3bba9e2cb18b3b1fab6f7b5015 |
C:\Users\Admin\AppData\Local\Temp\gtNnMZSQvWONNM6.exe
| MD5 | b8c11dc9cc66fbfcb490f8fe958b3634 |
| SHA1 | 320a454b7041531746dc703d7991dc21dcc3b3ff |
| SHA256 | 994bb989ba6ea4e5a1d1653461bd39c301f40bb51760483358550c151b775eee |
| SHA512 | 44a54c4e0b0b3db1c4fadfadf522e239a29b8e60f9aa0275a8cf85ec24aa86368e7a4df7d129fd224ac537bdea26fb566048afeb97ba567d18cd1fa5c2c1a158 |