Analysis Overview
SHA256
97bfea76db6fd72e3bdd0b6317b5011555f53b96ff2bb63f2dc9147c0b8a5660
Threat Level: Shows suspicious behavior
The file 2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_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 06:51
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 06:51
Reported
2024-06-03 06:53
Platform
win7-20240221-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\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_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_ff0cc1c9dbe2c469827a10ac651504b6_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_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2912 wrote to memory of 2996 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2912 wrote to memory of 2996 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2912 wrote to memory of 2996 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2912 wrote to memory of 2996 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_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\f88ALwqLU9nR9de.exe
| MD5 | 6020441303accaf0593b6aae740e094e |
| SHA1 | 58e54c8653be9837c1850f04dd8d0a72a193ebd7 |
| SHA256 | 8441863f2af6ec07e7e914ab3d2ffd86a12350df4ef3e5ea94d8d0f78d377db4 |
| SHA512 | c07103f9b05008b6fe325d9f56b2654d9f481c87898fedd5619dcdf920ad3206b67c66fd104f90d305521d3fab2b976b709f070b4cc2caefc120560119771269 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 06:51
Reported
2024-06-03 06:53
Platform
win10v2004-20240508-en
Max time kernel
133s
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_ff0cc1c9dbe2c469827a10ac651504b6_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_ff0cc1c9dbe2c469827a10ac651504b6_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_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3304 wrote to memory of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3304 wrote to memory of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3304 wrote to memory of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_ff0cc1c9dbe2c469827a10ac651504b6_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| 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 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| NL | 23.62.61.129:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 129.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.236.111.52.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 | 26.35.223.20.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 | 0c7fc6ebf1d5cb9c9a63b67e90f09dff |
| SHA1 | 354014756847d984e69a06f0dc988207ba561510 |
| SHA256 | f2bd3e32ff92b973cf53dc3e6b3e6f5ae77f4f79bcb25ed8a614e98075e8a58a |
| SHA512 | 37ca89e4a81a18e375e3d155c0a07a15e49fc5070204ce6f44e90960e5c4a820da995af36c56a737c74d83fbd5498207565439bb3d7928b6f0150f73541380a9 |
C:\Users\Admin\AppData\Local\Temp\1AVSnT8AdXMse8t.exe
| MD5 | 0863aef03ea4def73c5637c707831cc5 |
| SHA1 | 1301ab20ec29ad317f61c93584775d5ed8eaeb74 |
| SHA256 | 94bddf7d6ce7d9045b854d21e7b6eeeade539a31c9d13733a5feef5c8fd63860 |
| SHA512 | fea69b873f95fc2842cd03b7baedda0436feb0cceda6f343cb2999bf910fca282e1d8f44fc8c93f6f08418829b614ab6b915e13aad11df51ac957374b1978a30 |