Analysis Overview
SHA256
da548f8455e682da362cfc259f86839b6587edb51f13bcdb2674b232662342a6
Threat Level: Shows suspicious behavior
The file 2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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
2024-06-04 01:34
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-04 01:34
Reported
2024-06-04 01:38
Platform
win7-20240215-en
Max time kernel
121s
Max time network
122s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\L1BV1DdqI9lYPyw.exe | N/A |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | N/A |
| N/A | N/A | N/A | 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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\L1BV1DdqI9lYPyw.exe
C:\Users\Admin\AppData\Local\Temp\L1BV1DdqI9lYPyw.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\L1BV1DdqI9lYPyw.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/2916-15-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\L1BV1DdqI9lYPyw.exe
| MD5 | 14d794dbd99ee8df3f9fb40d30aae8b3 |
| SHA1 | e6295432d8d7a21a0c9036099a3198988db9444f |
| SHA256 | 5071dfae960c0619e9228204d05368b42e6a5b2d77be3553ec4454ae1a035b80 |
| SHA512 | 536e2e515d34956c77f1ee47afa67f99d70b1fc795bdef97b4f749833226d412d40dfa982f7e2d26bc5012bdfd9297babb93f08e65d4d0d62504521b45602728 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-04 01:34
Reported
2024-06-04 01:38
Platform
win10v2004-20240426-en
Max time kernel
148s
Max time network
151s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_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\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1304 wrote to memory of 1832 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.exe |
| PID 1304 wrote to memory of 1832 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.exe |
| PID 1304 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1304 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1304 wrote to memory of 1988 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_67e0e55fcd10c7e2686d053bca192be8_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.exe
C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.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 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.73.42.20.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\x2qrxqvmWsVHwar.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/1832-10-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | e7d8003a2a7e5c28e2bdcdf7a925c69f |
| SHA1 | 6546a3ba4349f73070365351da226d2a566d17ef |
| SHA256 | 4c77fd0ffde096ef4360d67eeb3dbab31e48773326c31d163e5f6f3972f910e9 |
| SHA512 | db40ecdd053823ef3a1da32aba2fb9ae07a778b2818874302144275cb3f0ae3f7b789ee484228152df5da1d46ad27c3f8de0d94235e30c4b094e6f32c65b9442 |