Analysis Overview
SHA256
d3cd85600b045f6836092c4494021a0b3a25324b85acf05a0154cc31e7742d77
Threat Level: Shows suspicious behavior
The file 2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
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 AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-01 07:28
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-01 07:28
Reported
2024-06-01 07:30
Platform
win7-20240221-en
Max time kernel
122s
Max time network
123s
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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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_98656f4f1f1203ee5b127d53a53c3b17_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_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2872 wrote to memory of 1556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2872 wrote to memory of 1556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2872 wrote to memory of 1556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2872 wrote to memory of 1556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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\yVjR22jfPW6zhuA.exe
| MD5 | bb610ebde5ec16369b88631e32666b93 |
| SHA1 | f64d90288882612f0ddb49eedbe51198689c0818 |
| SHA256 | 194f79d8a375f8517f392202f29761ba61667f009ed9bae8ee25dcc5e4871577 |
| SHA512 | 872daa185ecc86135a19fc17366a824da842c9faec3f8e2d7780127bd7d3b56a8134fba641c97fe6b49c89f2cd7505a4cdbc6a793b652b8fa2740e14fc2b62df |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-01 07:28
Reported
2024-06-01 07:30
Platform
win10v2004-20240426-en
Max time kernel
93s
Max time network
148s
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\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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_98656f4f1f1203ee5b127d53a53c3b17_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_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3612 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3612 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3612 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_98656f4f1f1203ee5b127d53a53c3b17_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 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.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 | 11.227.111.52.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 | fc3eb925b60d3eca3c6714841a70d8aa |
| SHA1 | 872a2e8e8e6107d40b292ddae4742097f3c64834 |
| SHA256 | adea8cc41d5f28664fed79e3ecba17ada669e2e0eee1e20bbc443ea07e53588c |
| SHA512 | 56d68000b78d2f52e101405b2b68c75e0d9aa31e9f4438659c5a06a3176c13d4473fe69469dfbe95b6139b996f573cfeba22934e697b4cdca042c7269584b6c6 |
C:\Users\Admin\AppData\Local\Temp\n39yOFdrAAjU2I3.exe
| MD5 | 9bf20c1fce7bf3e30dac2617907e4d49 |
| SHA1 | 73ffd9575dc86f27175e583dc5a83d7f9a6031bd |
| SHA256 | f290f69291ab2826262454d840d0cbc44c94d9fa1f11628a45842f7a0dbad16e |
| SHA512 | e9c70304f68c394328feff3ef3625b78a0e6fed2c97359f670fe2e49b654ca1f662be8f51e555e8d2d207029d6757491509f57a3dc5cb49e14c31445a619ee9c |