Analysis Overview
SHA256
7ad69e79d3fa46aab84ecec563eca22611b4ac81e52967cfc1b87d4e3044a21e
Threat Level: Shows suspicious behavior
The file 2024-06-03_1e138ba27e069eebe7d994fb51386e90_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 09:29
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 09:29
Reported
2024-06-03 09:32
Platform
win7-20240221-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\CYYr7cQfRnnrwAw.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_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/1752-15-0x0000000000400000-0x000000000040D000-memory.dmp
\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
| MD5 | 357e685f534ad6bbf22bfb9766733324 |
| SHA1 | eac21f61dcc4384f0c1fa9ee3663b23321ae11ed |
| SHA256 | 9daea149ee8edf1d29e1195dc7a9d71041dac16828957a086e421ad8d3ea595e |
| SHA512 | 4b924d5db0b3da1d37765b07e50e7ad75b5a99ad5de82b42d754b2d9770e5bd5b5fd7a7f36a736cdaec143959cf640802d0452c928b00630de8a55333b64d01e |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 09:29
Reported
2024-06-03 09:32
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\M2cTnsyzwjodubt.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_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_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_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3652 wrote to memory of 2308 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\M2cTnsyzwjodubt.exe |
| PID 3652 wrote to memory of 2308 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\M2cTnsyzwjodubt.exe |
| PID 3652 wrote to memory of 556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3652 wrote to memory of 556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3652 wrote to memory of 556 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\M2cTnsyzwjodubt.exe
C:\Users\Admin\AppData\Local\Temp\M2cTnsyzwjodubt.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\M2cTnsyzwjodubt.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/2308-9-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 65d58309fdf1dd5c23d590cf5e012f12 |
| SHA1 | cfed61bf9caf94eeeffb40d6b78dbdd908237f35 |
| SHA256 | 6185f08680801e8925364088c48d6a7d2462dfa1f030aefd45e5d2c590bfc580 |
| SHA512 | ab3c2b37650a33110d38bef001afcc5439725930f4a29699372cc96a10857aadefd7878b9585ffea6787281b4ba69661ab7d246c6910412f040141a89db5d05b |