Analysis Overview
SHA256
d4a7b8f3f6fbb6a6bbb2f408dbec8f0bdb7439ab6ae4610e81021b3a0afb50c6
Threat Level: Shows suspicious behavior
The file 2024-06-01_a3753e717a05afbac151713074724a64_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
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
2024-06-01 07:28
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-01 07:28
Reported
2024-06-01 07:31
Platform
win7-20240508-en
Max time kernel
118s
Max time network
119s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| 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\2024-06-01_a3753e717a05afbac151713074724a64_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\2024-06-01_a3753e717a05afbac151713074724a64_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\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1276 wrote to memory of 2056 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1276 wrote to memory of 2056 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1276 wrote to memory of 2056 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1276 wrote to memory of 2056 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Temp\4LDzJd3rWYtQ0N5.exe
| MD5 | e543d749bdbf29d7c4ca884e9e4d8cdb |
| SHA1 | c51f67b22b39f37d6d60936ed016a90b76a53db9 |
| SHA256 | 68443a002c8304911b4e4970e9103b03d086a1925a1535d7e5fe2892daf92821 |
| SHA512 | 0263163b8ea7f0d6ed8b31390a626e31c712fad82cc126d8c7e819b1d553d6f058f63fbaae7b6afeaabe92a304f0531bb9a5dbcf75311041981bb99653c47e67 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-01 07:28
Reported
2024-06-01 07:31
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:\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\2024-06-01_a3753e717a05afbac151713074724a64_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\2024-06-01_a3753e717a05afbac151713074724a64_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\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1672 wrote to memory of 1032 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1672 wrote to memory of 1032 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1672 wrote to memory of 1032 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_a3753e717a05afbac151713074724a64_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.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 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.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 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
Files
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 | a7ffa8796080b4d516f2b1351138f488 |
| SHA1 | b63aa8b43fbc82ad3bf31ead2c8ef3f94be37ce0 |
| SHA256 | 7ec47e7b5e934a73f38aafe47f544c9d6f86bfbff677b2add9c2765723ccf9ad |
| SHA512 | 1b173e4a111dbfc1607fae1f98c502e20de93dc39624381f327563caa7dd8ec2cfe47330864bf00b1cafb4d83c396621d00b043ee7bb1f243bb0e4f192968d03 |
C:\Users\Admin\AppData\Local\Temp\T4YjEucjFoZSDUl.exe
| MD5 | 288f481ed040818db389016f04358d4c |
| SHA1 | 0822abfd6b1f4ac6eb82f4792ea1d30685b25953 |
| SHA256 | 66490b5dc838d9856893c12034fa33148f251fef0f00246e744aa27f00cb6f75 |
| SHA512 | e1201a677f0e2095f348e5931e0bdf39195eb6eb9b9170c4f0de6ba2470f23c7953b3e953fad8033146c9ab6d37cc8875fb974e0b780ded0461c52af62ad9ad7 |