Analysis Overview
SHA256
6bc9e25575d9913b16aa1e3d289325daa809d7d1babb4923b34ad44f4de00775
Threat Level: Shows suspicious behavior
The file 2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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
2024-06-01 07:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-01 07:44
Reported
2024-06-01 07:46
Platform
win7-20240508-en
Max time kernel
118s
Max time network
119s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.exe
C:\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\03f3JmyMdQp2QY5.exe
| MD5 | 2fdb371d45181dff59577110ba1064e2 |
| SHA1 | 42a5833cb0ac90e38d734d1327bb3f7c7a6aa453 |
| SHA256 | 80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155 |
| SHA512 | 52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/2016-12-0x000007FEF5753000-0x000007FEF5754000-memory.dmp
memory/2016-14-0x0000000000CD0000-0x0000000000CF8000-memory.dmp
memory/2016-15-0x000007FEF5750000-0x000007FEF613C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-01 07:44
Reported
2024-06-01 07:46
Platform
win10v2004-20240508-en
Max time kernel
133s
Max time network
101s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_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\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3380 wrote to memory of 3664 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe |
| PID 3380 wrote to memory of 3664 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe |
| PID 3380 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3380 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | C:\Windows\CTS.exe |
| PID 3380 wrote to memory of 2524 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_03687dfe73e5dcbe025c25b6b24a6879_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe
C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.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 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.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 |
Files
C:\Users\Admin\AppData\Local\Temp\VUq5vQlNX2vgZ8l.exe
| MD5 | 2fdb371d45181dff59577110ba1064e2 |
| SHA1 | 42a5833cb0ac90e38d734d1327bb3f7c7a6aa453 |
| SHA256 | 80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155 |
| SHA512 | 52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20 |
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
memory/3664-9-0x0000000000DD0000-0x0000000000DF8000-memory.dmp
memory/3664-11-0x00007FFE899C3000-0x00007FFE899C5000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | aac372ef237223a34ade3829745631f8 |
| SHA1 | ac641b8928a17e3d398ff8486f4165ec52c4957b |
| SHA256 | 0f9ddaffd7043f5c7e711b19d74441d43925efccecca1ac6b263a87250274702 |
| SHA512 | 5dbbafc4ecd5dbc485257e5314b52539cd7a5a8bb630da7277d0c9c621d6db717baed530f077248282870bad387c7a088c914df9618c53a292206aff120251f3 |