Analysis Overview
SHA256
a84ddfc94e595d086ba20fcd54691695454f246a084e4a1d55dd67b33d3cf3d3
Threat Level: Shows suspicious behavior
The file 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
Adds Run key to start application
Drops file in Windows directory
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-26 10:41
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-26 10:41
Reported
2024-05-26 10:44
Platform
win7-20231129-en
Max time kernel
119s
Max time network
119s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe
C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe
| MD5 | af88cab288e8213a11a7ea5313363d31 |
| SHA1 | cb769e3246d5244a0040621e919f7c519ba49986 |
| SHA256 | 7407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366 |
| SHA512 | a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-26 10:41
Reported
2024-05-26 10:44
Platform
win10v2004-20240508-en
Max time kernel
132s
Max time network
124s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1328 wrote to memory of 3636 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe |
| PID 1328 wrote to memory of 3636 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe |
| PID 1328 wrote to memory of 1220 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1328 wrote to memory of 1220 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1328 wrote to memory of 1220 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe
C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.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 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| NL | 23.62.61.155:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 155.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 31.251.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.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 | 200.197.79.204.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe
| MD5 | af88cab288e8213a11a7ea5313363d31 |
| SHA1 | cb769e3246d5244a0040621e919f7c519ba49986 |
| SHA256 | 7407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366 |
| SHA512 | a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679 |
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 | 3e4d98460774bd53a9eaa1f6af10b66e |
| SHA1 | 7e15bf407bf7f3149e0b692a31a0744c5b6607c4 |
| SHA256 | f0282689ac56081c789bed84fdb05ab75d50549f20a122b2aa669a2313cca57a |
| SHA512 | 0860f06d45b398cfbafca7c1fe07707eb8adacc735d67a4958936b526aed052b8526b8478fb8d44c1f8ca96644baba7fedcb1719d8a93990dfabf74c67eed0d9 |
C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe
| MD5 | b5b3dd398fd7093bc948369d7f25829a |
| SHA1 | 62e6b25c5cbca56b5b8dde82fb66bac69932f859 |
| SHA256 | 88b594ed50f8a31d5be23cefcd8c191e8cbf853b253a4aa896c5eecc9bd5d0ba |
| SHA512 | 6a0832f85cbab01d0691c5072861511c2bedc6d840bbfd02ae95d12d1d550ad5746f2ea0d91f2eaeedce37806a521694e94eea3b75ba44b2a3cc221c4c96d699 |