Analysis Overview
SHA256
9b72c3dc86282139d039f45ee6ce6ee546a7d9c209fb9ca4736c5b05774b3f3c
Threat Level: Shows suspicious behavior
The file 2024-06-04_9d907de961e3f0f14fe3da905c77122c_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
2024-06-04 00:28
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-04 00:28
Reported
2024-06-04 00:31
Platform
win7-20240220-en
Max time kernel
121s
Max time network
122s
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:\Windows\CTS.exe | N/A |
| 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_9d907de961e3f0f14fe3da905c77122c_bkransomware.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_9d907de961e3f0f14fe3da905c77122c_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_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1940 wrote to memory of 3048 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1940 wrote to memory of 3048 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1940 wrote to memory of 3048 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1940 wrote to memory of 3048 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_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\egfBY8mWsh3Y1v9.exe
| MD5 | 2650bf72fd6322776ee9bd69a0ed9a35 |
| SHA1 | cb53d30abdc132f383cef19738d9ed0729f91379 |
| SHA256 | df49a7093056889f531868a3b6af55fa6794462dabbe3b73165619f733e0f6fd |
| SHA512 | af003ea421bdac0e811b9222a5356b1ecab3775b2f76407ec3f7fbe1065087134810ab7eb09188d0a998264fe1f489cb83ffbec021ee4ed885d47c128f96e9e3 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-04 00:28
Reported
2024-06-04 00:31
Platform
win10v2004-20240426-en
Max time kernel
92s
Max time network
137s
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:\Windows\CTS.exe | N/A |
| 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_9d907de961e3f0f14fe3da905c77122c_bkransomware.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_9d907de961e3f0f14fe3da905c77122c_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_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2660 wrote to memory of 2396 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2660 wrote to memory of 2396 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2660 wrote to memory of 2396 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.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 | 68fa0a26341c518ceb1f0d636332f2ee |
| SHA1 | d3c518788a9e112ba74f1515b49d44d7f27ef091 |
| SHA256 | d7094c8cd68925514e57873c45d6ba5f6a73f7c148c961ad4de200b0dd376cf8 |
| SHA512 | 05e9ac6e3ba0d958ca5850593035c7af52dc1ab61cba2d76043d02e541eb71fdb3ba693d0aab91d27e13adff356f135007b257fb313e469e81dd22e430203ba5 |
C:\Users\Admin\AppData\Local\Temp\yn9uBuKxK3AFeXa.exe
| MD5 | ca596862678afef21bbf23fc18842e51 |
| SHA1 | e06ee5064eec590dd5146c843beff7cc70b899bf |
| SHA256 | 446db7674e15efb1f9470f7900853d8332684ac27f892b6eb99753ac28e9b069 |
| SHA512 | ef8b50f5e5c4af926cb4b6165338245f4e63575527d7eabc0b6c904ce1b1f7aadbcb9c7e3ec54bc2b67ae6cfb03de66fa7227aceb89206d58f8aaca9046fdad1 |