Analysis Overview
SHA256
333fe47ab24ddeb05c85270084b42799c34c61f48c690814b2d44e4cf825e224
Threat Level: Shows suspicious behavior
The file 2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_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 WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-03 06:49
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 06:49
Reported
2024-06-03 06:51
Platform
win7-20240221-en
Max time kernel
117s
Max time network
119s
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_f48cc34a56af6db153fc1c29a0dab89f_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_f48cc34a56af6db153fc1c29a0dab89f_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_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2240 wrote to memory of 2936 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 2936 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 2936 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 2936 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_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\XVosSWrN76PRsBC.exe
| MD5 | df9b73f6750abfde168b178357997a57 |
| SHA1 | fe451c41391dec65a0c2431bb4e27dd9fab343b3 |
| SHA256 | 5594e8608ab59cb651f0fa9a1eb747f25c469b16ce5f9099f417f4d877ecf170 |
| SHA512 | 8a2fbb9faeb34dc16a08cdb25c40644ee1378f7f2dfb74e33f53c631b30fdc3026e92f3e132d22b91515fef602563211639cbe9257f40e7ad52ddfbd5d157910 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 06:49
Reported
2024-06-03 06:51
Platform
win10v2004-20240508-en
Max time kernel
148s
Max time network
153s
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_f48cc34a56af6db153fc1c29a0dab89f_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_f48cc34a56af6db153fc1c29a0dab89f_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_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3124 wrote to memory of 3148 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3124 wrote to memory of 3148 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3124 wrote to memory of 3148 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_f48cc34a56af6db153fc1c29a0dab89f_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.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 | 23.62.61.72:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 52.111.229.43:443 | tcp | |
| US | 8.8.8.8:53 | 11.227.111.52.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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 9.73.50.20.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 | a9abcf7c2b683d2b436612855b38c47a |
| SHA1 | b04ccf6b326c4854feb81d8484dd4c4a2b7323eb |
| SHA256 | 503ee2d79da8a5b94f6d957e83331b29b40c4ac4381fa69ce1b2a73f76912e1d |
| SHA512 | cc6aa6011958672520b68c75cec83aa659eef70a3be944b4579558451dd59db947c0a0b058c9a2cc9d261196bf3fb56c6e166a6e560fc3263aec4fc27f80e13a |
C:\Users\Admin\AppData\Local\Temp\mANA2oul3LGYSbo.exe
| MD5 | 9f0ababa635fa376d4c1cdb0afa22a89 |
| SHA1 | 1451e575ceaf120472bab87930b29ccaa3f3738c |
| SHA256 | 622f4483b2a4194ded5f058797a451232dfc654b22b329561669246b56d032e8 |
| SHA512 | 41c1d6f3b7a951f9c6ea30f7fbda1e13e92f3448d7be7eacfbb581d4ef19e9505eb21d12be6f19be442927e901e3f48d2bb885748b32ebc9d25179d5415912fe |