Analysis Overview
SHA256
9de7cac8c186c098f889262f30f87b76eb907a2545fe17fb3e8c8733b43b1f87
Threat Level: Shows suspicious behavior
The file 2024-06-04_ddabb10468039a14619a357bd42f494d_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 WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-04 01:40
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-04 01:40
Reported
2024-06-04 01:43
Platform
win7-20240221-en
Max time kernel
119s
Max time network
120s
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\2024-06-04_ddabb10468039a14619a357bd42f494d_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\2024-06-04_ddabb10468039a14619a357bd42f494d_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\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2952 wrote to memory of 2812 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2952 wrote to memory of 2812 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2952 wrote to memory of 2812 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2952 wrote to memory of 2812 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
C:\Users\Admin\AppData\Local\Temp\jySdoJ2qZcGlplA.exe
| MD5 | 4e6bb05687076152dfaecbe24a2c52f6 |
| SHA1 | 4e6863d163ea4a2ee8233e1da468888df7707494 |
| SHA256 | 9e8f1b7f9dfade3341dd9b9efe965444025bba252b61344ab1bbccb84be579d3 |
| SHA512 | cf183f422ad86e186dd1a0b1dcd43db815118076109c7661012ff864d100bf9955b21dcda50f208c4f7eff3fb0d080eaa97c42d3c902922bc1a85a82d3b914ff |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-04 01:40
Reported
2024-06-04 01:43
Platform
win10v2004-20240508-en
Max time kernel
149s
Max time network
150s
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\2024-06-04_ddabb10468039a14619a357bd42f494d_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\2024-06-04_ddabb10468039a14619a357bd42f494d_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\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3440 wrote to memory of 4832 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3440 wrote to memory of 4832 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3440 wrote to memory of 4832 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.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 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.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 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | d36aaf51efccb154694b4c4d387ecd40 |
| SHA1 | a1541a5356d150b70455c154efcdc2575d657175 |
| SHA256 | 9f7c7a5d91520aff68572d2fa5fba1dee56bb382dab784cacb5ceb2dc4d4c603 |
| SHA512 | 1b008512b0ff5298005a3c74d65feba63b7c3bd5243c317536cbca879253f3456170555317800fbd7bd709e83c9e2d824af15d770da178af06a334f58f8d16a2 |
C:\Users\Admin\AppData\Local\Temp\wKGkj43WMqwGZhG.exe
| MD5 | 18bc6c19a0ee167f79ec2b48ed52be63 |
| SHA1 | 4ba6ac9aad451d63d0632692f3e13e1eb17f2b73 |
| SHA256 | c39204ad20d101b8f7e75c824bbc679693614e6297e82b09a18fdf4a05fbca96 |
| SHA512 | 247d8b6f27e6c97954dc2eabe156a3a6ddd6a8ff0dab3677dd792e7c55ff84fb94a4580524ab67d50c01ede8502a9f61b8ea7de4e935772a9d7c58d2c5cf46fa |