Analysis Overview
SHA256
97bbeccadd56abd02385e57c9bffe93065c77d0b4b9e07d20d68c478aa5f2f22
Threat Level: Shows suspicious behavior
The file 2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
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
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-01 07:27
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-01 07:27
Reported
2024-06-01 07:29
Platform
win7-20240221-en
Max time kernel
120s
Max time network
121s
Command Line
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\45ZKJ6vrDzrCBoY.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.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:\Windows\CTS.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_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\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\45ZKJ6vrDzrCBoY.exe
C:\Users\Admin\AppData\Local\Temp\45ZKJ6vrDzrCBoY.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\45ZKJ6vrDzrCBoY.exe
| MD5 | e97c622b03fb2a2598bf019fbbe29f2c |
| SHA1 | 32698bd1d3a0ff6cf441770d1b2b816285068d19 |
| SHA256 | 5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160 |
| SHA512 | db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-01 07:27
Reported
2024-06-01 07:29
Platform
win10v2004-20240508-en
Max time kernel
149s
Max time network
151s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\jEfWM9nUmDkraIZ.exe | N/A |
| 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\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_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\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_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\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_544c7f5d4fdcbd3dfd27ed0ecde09cad_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\jEfWM9nUmDkraIZ.exe
C:\Users\Admin\AppData\Local\Temp\jEfWM9nUmDkraIZ.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.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 |
| US | 8.8.8.8:53 | 225.162.46.104.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\jEfWM9nUmDkraIZ.exe
| MD5 | e97c622b03fb2a2598bf019fbbe29f2c |
| SHA1 | 32698bd1d3a0ff6cf441770d1b2b816285068d19 |
| SHA256 | 5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160 |
| SHA512 | db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d |
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 | 73896f2497005408467877bb86a202e1 |
| SHA1 | ae090c9deddc9a4371685b0f902a2db8e910c0dc |
| SHA256 | ed61715ccefd36cc6cd9520e14b73539181440d0fa5b1c0d79940fe78b12c9f0 |
| SHA512 | a3d015ff1a688fbf29185d5b2a55c74de15a9b5c1d148f54b95ee90ba5b0f6de9e0265f84508fa1248914f7731cbb5804ff378ea0bc4ef61ea49cfefd5ed5d83 |