Analysis Overview
SHA256
cc5e209c47f931d3004d19755b26b21686344b86f26976a2a9cf87592b2dee32
Threat Level: Shows suspicious behavior
The file 2024-06-03_cb199b8116cf37150da76f327a3b423e_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
2024-06-03 06:45
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 06:45
Reported
2024-06-03 06:48
Platform
win7-20240508-en
Max time kernel
122s
Max time network
123s
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\2024-06-03_cb199b8116cf37150da76f327a3b423e_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_cb199b8116cf37150da76f327a3b423e_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_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2960 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2960 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2960 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2960 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_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\m5qLdRgRBqIsFVn.exe
| MD5 | f7d109802e606a2e5613b82ee9a36e35 |
| SHA1 | c94033de9feecfddaad6ed69e2ce89b566158fe3 |
| SHA256 | b42ba98b0eb01066516aac12ade7249ac42eb0299c12ed42f56939ce164c0fee |
| SHA512 | d68002581b559ff65b5b7a0e22fd7f7a60437b4c8cf14c03490484ff0957bfd308a3ed4e48beebc68074b114404ded14c8b22dda6f1d2c1799a7d0d8abb39c6d |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 06:45
Reported
2024-06-03 06:48
Platform
win10v2004-20240508-en
Max time kernel
132s
Max time network
102s
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\2024-06-03_cb199b8116cf37150da76f327a3b423e_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_cb199b8116cf37150da76f327a3b423e_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_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 5040 wrote to memory of 2360 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
| PID 5040 wrote to memory of 2360 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
| PID 5040 wrote to memory of 2360 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_cb199b8116cf37150da76f327a3b423e_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| NL | 23.62.61.171:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.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 | 8c5fad72a995c8ad3f688e1d7ec31562 |
| SHA1 | 6c6a967377bb2a737fe0572634cc860b4db79b83 |
| SHA256 | 8966d5fc19ae20bad4654c511fc89d2ed951dccf3473e354b36ff07d67c2887f |
| SHA512 | fa256b9fc47f8229da62b01d92a39b08c440c4dd8e691121057d2ad176a06757d224d232d92e571cb0064b0892ca99fdb10d9ef812fb88e7f130ac51a45fae55 |
C:\Users\Admin\AppData\Local\Temp\Ks7SOS2gYx2J7gI.exe
| MD5 | c9e42f8a978dff765e9f5cfc023dfd4e |
| SHA1 | 6909eae5d34fb7306dc9f15b4bc00a72a10bcabf |
| SHA256 | 4943547c67ee378c4011576fd4b01aa1da68284d2519266080454e4bc5e3528d |
| SHA512 | fa5cab51c12262d4f52df445427d6b6d15f52f907fcc485c9cb1850fc95e1f1cfc39910e8e9a9eb1ed094d083aa8a095bbb424adf1e64df9182deedb88e5362b |