Analysis Overview
SHA256
8152609628a931b34f46ecd418564db51fdd8e8fda8fccb6d7b01361aaa7bc08
Threat Level: Shows suspicious behavior
The file 2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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 AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-04 01:33
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-04 01:33
Reported
2024-06-04 01:36
Platform
win7-20240221-en
Max time kernel
120s
Max time network
128s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.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_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe
C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
memory/2076-9-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Temp\XDh7sKQByW8GxCF.exe
| MD5 | 809665a97260e903a89b05f9ac340ad6 |
| SHA1 | 1c18ec299e0ef066cc40e368cf51e8175915a4c3 |
| SHA256 | d0eb062437846f29bb371bf751e001fc8b4da79f69c1e93a91d91a367312231e |
| SHA512 | e85bce43d1c0e0cbd4115d8de361eead351cbb3c58a4c2d4693766e0a23bae38398b73b2c7197963eeab843cb0a9544bc76d801b2caa2d60abd0205aad7d0cdb |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-04 01:33
Reported
2024-06-04 01:36
Platform
win10v2004-20240426-en
Max time kernel
149s
Max time network
156s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.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_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_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_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3048 wrote to memory of 4804 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe |
| PID 3048 wrote to memory of 4804 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe |
| PID 3048 wrote to memory of 64 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3048 wrote to memory of 64 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3048 wrote to memory of 64 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_651a76e86d76a3d7704a9d5eb85df726_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe
C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.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 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\6YbZY9d5hEqCtqi.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/4804-10-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | c60f9456db925e4da7ad0085314eebc0 |
| SHA1 | 9fda8530d1bc921e8ba541766f88183403a58a63 |
| SHA256 | d854bd690ac50f6285b8d8ec79fdb8dd91fb75bd991f3f6e6b1c9e4f107691e8 |
| SHA512 | e0010e24db392a73f5ec4d0eb91ab64977f1c60faa9b4d695111e47f18c9613e191b673a11b684e0dbce0ca901b3f594fed473fea6c1558d27f157a3660e6bb4 |