Analysis Overview
SHA256
3b362a61193dddcab3f3d7c7d150108b7fcb027a689560cefbffa11d40c478f7
Threat Level: Shows suspicious behavior
The file 2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
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
2024-06-13 03:54
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-13 03:54
Reported
2024-06-13 03:57
Platform
win7-20240221-en
Max time kernel
122s
Max time network
123s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\E90L1zMdjxUq8h7.exe | N/A |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
| N/A | N/A | N/A | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | N/A |
| N/A | N/A | N/A | 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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_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:\Windows\CTS.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\E90L1zMdjxUq8h7.exe
C:\Users\Admin\AppData\Local\Temp\E90L1zMdjxUq8h7.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\E90L1zMdjxUq8h7.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
memory/2256-15-0x0000000000400000-0x000000000040D000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-13 03:54
Reported
2024-06-13 03:57
Platform
win10v2004-20240508-en
Max time kernel
51s
Max time network
51s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 232 wrote to memory of 1224 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe |
| PID 232 wrote to memory of 1224 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe |
| PID 232 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | C:\Windows\CTS.exe |
| PID 232 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | C:\Windows\CTS.exe |
| PID 232 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe
C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe
| MD5 | abbd49c180a2f8703f6306d6fa731fdc |
| SHA1 | d63f4bfe7f74936b2fbace803e3da6103fbf6586 |
| SHA256 | 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1 |
| SHA512 | 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9 |
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
memory/1224-8-0x0000000000400000-0x000000000040D000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | d7db552f3b735605769344828927c283 |
| SHA1 | 3ecedb24c1e893b5288abe0de24c9582b7c07602 |
| SHA256 | 06a86a5e1faad9b3335fdc6a2923922e3dd859294739daeb8562baf07f9fb9a2 |
| SHA512 | eaf915b3782acbd4ab940bc687e3fb1bddad30c272077d3adbc7f15b9770ab141da64d6605a6e14baa8db84d1b7a63e5d451a058e2ad9a664a3caeb50318d6af |