Analysis Overview
SHA256
4a20e45e5ef46d57e041253c50cd001e354a1b793f64f072c6a005ab9d886046
Threat Level: Shows suspicious behavior
The file 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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
2024-06-03 09:43
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 09:43
Reported
2024-06-03 09:45
Platform
win7-20240508-en
Max time kernel
120s
Max time network
120s
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\tFaqkJmI52IWTby.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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_6d9c1457f7c1e8371f2b19578cebe8b5_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_6d9c1457f7c1e8371f2b19578cebe8b5_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\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
C:\Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/2376-15-0x0000000000400000-0x000000000040D000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 09:43
Reported
2024-06-03 09:45
Platform
win10v2004-20240426-en
Max time kernel
93s
Max time network
95s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.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\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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_6d9c1457f7c1e8371f2b19578cebe8b5_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_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3380 wrote to memory of 3348 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe |
| PID 3380 wrote to memory of 3348 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe |
| PID 3380 wrote to memory of 1504 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3380 wrote to memory of 1504 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3380 wrote to memory of 1504 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe
C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 203.107.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/3348-10-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | adb495468b58fddef96de2e3d97264d6 |
| SHA1 | edb9c5af966998970ef9cc0473df75e58b45906e |
| SHA256 | 3ffff17ff14e5841e635aa9e6376d123b94f7a21c25ac94aef892f2c837390c4 |
| SHA512 | f1a349c20899b6c059d43caf0d9356d2c39e5ce180505d480183ce7dc0327d24044e071c37fc00b1b6d70355ae23db548fcea20bfd611638a2b2475ddd4f91ee |