Analysis Overview
SHA256
e75499cde0fb6d99a85ec69640e10101d83c5f71c71568dcb5cc83742ccaef34
Threat Level: Shows suspicious behavior
The file 2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
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
2024-05-30 23:21
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-30 23:21
Reported
2024-05-30 23:24
Platform
win7-20231129-en
Max time kernel
117s
Max time network
121s
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\6arzB9ca4sqZ4R8.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe
C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/320-15-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\6arzB9ca4sqZ4R8.exe
| MD5 | 6606015e8d0759af714241d4ab6a82da |
| SHA1 | 9d83a08910a66a630e8768c5eb7dd12fe0db152b |
| SHA256 | 01ff41497b28bf95668e61fd66762dc5434d3c560e665cdf8ae6071635a4e629 |
| SHA512 | 125e8fe17ddc2cf7052a1bd9977989a3ed7c6e26b9177f332815299cfaa37697f5dde06d4d7ce9ae3d788deeac04923d87557a6c9c09d2e7747c8d6cfc682fdc |
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-30 23:21
Reported
2024-05-30 23:24
Platform
win10v2004-20240426-en
Max time kernel
94s
Max time network
157s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_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\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2472 wrote to memory of 1512 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.exe |
| PID 2472 wrote to memory of 1512 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.exe |
| PID 2472 wrote to memory of 4860 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2472 wrote to memory of 4860 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2472 wrote to memory of 4860 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_12f7df5c56ce986d404ead898b7d018b_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.exe
C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 145.83.221.88.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 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\UrvPRdtUvmJuMln.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/1512-9-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 46c2375504b8692da9c7967dbe0095a8 |
| SHA1 | 613aac0889ec5564ea176ec55fb18c62ac1bcd32 |
| SHA256 | 5022c8a9fd7925bd5487920504a22f6f240339fe7640131d8d071b65e7f1a851 |
| SHA512 | 31ea007cc95ce336e3b05a236e69429887881ec22bb9d8f196eeca15197b25a930d57f4d160d64391d55046d72bff0e04ec19f0497d00db0bb524fd350eff9a5 |