Analysis Overview
SHA256
0f6f1d62a783f941c5a971af0863be10efbb80a2d4bf2b193aea77844c83cdf9
Threat Level: Shows suspicious behavior
The file 2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_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
2024-06-03 06:42
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 06:42
Reported
2024-06-03 06:45
Platform
win7-20240221-en
Max time kernel
117s
Max time network
123s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\vuyEEi0ygaewR1S.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\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_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_b48e317d598e7f7d26fb5e34a4ff260c_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_b48e317d598e7f7d26fb5e34a4ff260c_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_b48e317d598e7f7d26fb5e34a4ff260c_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_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\vuyEEi0ygaewR1S.exe
C:\Users\Admin\AppData\Local\Temp\vuyEEi0ygaewR1S.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
memory/2504-10-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
\Users\Admin\AppData\Local\Temp\vuyEEi0ygaewR1S.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Users\Admin\AppData\Local\Temp\vuyEEi0ygaewR1S.exe
| MD5 | 52d7d04ce583a47172b30b479043c57f |
| SHA1 | 2591d1c2589f731e2e31736804b3a3d7f5dc70a3 |
| SHA256 | 597f4757bdefa2e743b7b8e4089addf8be56184633922faa1053ec289cdbffd0 |
| SHA512 | 2c724369e839874dd3b9d892489f6a03ee01bc86f7bb970dec01c1a79696f2965acab754285eaa04fc1a6d6d36de378600be5ee2b67effa7c542bfe38cb5cfe0 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 06:42
Reported
2024-06-03 06:45
Platform
win10v2004-20240508-en
Max time kernel
132s
Max time network
101s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.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:\Windows\CTS.exe | N/A |
| 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_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.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_b48e317d598e7f7d26fb5e34a4ff260c_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_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1380 wrote to memory of 2408 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.exe |
| PID 1380 wrote to memory of 2408 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.exe |
| PID 1380 wrote to memory of 3796 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1380 wrote to memory of 3796 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1380 wrote to memory of 3796 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_b48e317d598e7f7d26fb5e34a4ff260c_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.exe
C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.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 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.32.126.40.in-addr.arpa | udp |
| NL | 23.62.61.155:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 155.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 152.107.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\yy0i4b27xJFVXSq.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
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 | 6159b4943f07f62f248442cb3e44835f |
| SHA1 | ca67dd03c06a8d50bb7be0f718cac3bd6b28a2a2 |
| SHA256 | 3cd9d16b29c3155815d63112e5d848496c0a2d710b1d8bd9ee26973e5d61f930 |
| SHA512 | d8fb64eacdd9517f01a649ac859e174aac86e0a78cbdf9e4a9a0e1ad6491f97cebbeb1a7b3fbe7a577ed975d72afe48e7d2c1ec345ef083e3219bb551217c6c1 |
memory/2408-11-0x0000000000400000-0x000000000040D000-memory.dmp