Analysis Overview
SHA256
20385a70d740d5a8260450df7f5cc67d7f33cc04d1f58685949237233f47c1ab
Threat Level: Shows suspicious behavior
The file 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
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
2024-05-27 14:39
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-27 14:39
Reported
2024-05-27 14:42
Platform
win7-20240508-en
Max time kernel
119s
Max time network
122s
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\ehZzv3VlsBvGJ1P.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe
C:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe
| MD5 | 38f108cddb6619fba80f8382d5227ece |
| SHA1 | 12fd277bf756f22cfae3043900e4aff8b9f05ed9 |
| SHA256 | 8296fe257b8c34398e3f291764454ec3cd9cbe06d60989b632ef4ba6c73ae5dc |
| SHA512 | 3db732c23f10122c78cffc6b6a5b11836ade1a23f5c6f9a192f2be2fa99c5bd7afb7a9e29c5d518a888cdd2091f9ac41b244214be226152830e96f5ec2cca424 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/2176-12-0x000007FEF5703000-0x000007FEF5704000-memory.dmp
memory/2176-14-0x0000000000940000-0x0000000000968000-memory.dmp
memory/2176-15-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-27 14:39
Reported
2024-05-27 14:42
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:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.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\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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:\Windows\CTS.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2996 wrote to memory of 3092 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.exe |
| PID 2996 wrote to memory of 3092 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.exe |
| PID 2996 wrote to memory of 2128 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2996 wrote to memory of 2128 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2996 wrote to memory of 2128 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.exe
C:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.140.123.92.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 |
Files
C:\Users\Admin\AppData\Local\Temp\4GbiKKhKI7gFJTj.exe
| MD5 | 38f108cddb6619fba80f8382d5227ece |
| SHA1 | 12fd277bf756f22cfae3043900e4aff8b9f05ed9 |
| SHA256 | 8296fe257b8c34398e3f291764454ec3cd9cbe06d60989b632ef4ba6c73ae5dc |
| SHA512 | 3db732c23f10122c78cffc6b6a5b11836ade1a23f5c6f9a192f2be2fa99c5bd7afb7a9e29c5d518a888cdd2091f9ac41b244214be226152830e96f5ec2cca424 |
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 | a27d321b9201f0686d4e6745cf50f96d |
| SHA1 | c2502a64d09fb728636e195b6e65a6aee1d10e34 |
| SHA256 | 1d1331bd0fc59344b83a246324f1271137e0435a5a288ac696bc0aeb4672ae4b |
| SHA512 | c9a9a9989980befeadcb61f3b666a95ae655279e5b27f41c6d78d76c27bc17726b1d71c04d271dba7af84bc3287eba43b24ad78806f9d11c284344a9ab33c8a0 |
memory/3092-14-0x00007FFFF3A33000-0x00007FFFF3A35000-memory.dmp
memory/3092-15-0x0000000000B10000-0x0000000000B38000-memory.dmp
memory/3092-24-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp
memory/3092-32-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp