Analysis Overview
SHA256
b2dcfdf9e7b09f2aa5004668370e77982963ace820e7285b2e264a294441da23
Threat Level: Known bad
The file Birele.exe was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
UPX packed file
Adds Run key to start application
Unsigned PE
Kills process with taskkill
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-06 21:25
Signatures
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-06 21:25
Reported
2024-04-06 22:04
Platform
win10-20240404-en
Max time kernel
1192s
Max time network
872s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Birele.exe" | C:\Users\Admin\AppData\Local\Temp\Birele.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Birele.exe" | C:\Users\Admin\AppData\Local\Temp\Birele.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2544 wrote to memory of 1624 | N/A | C:\Users\Admin\AppData\Local\Temp\Birele.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2544 wrote to memory of 1624 | N/A | C:\Users\Admin\AppData\Local\Temp\Birele.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2544 wrote to memory of 1624 | N/A | C:\Users\Admin\AppData\Local\Temp\Birele.exe | C:\Windows\SysWOW64\taskkill.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Birele.exe
"C:\Users\Admin\AppData\Local\Temp\Birele.exe"
C:\Windows\SysWOW64\taskkill.exe
taskkill /F /IM explorer.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 | 0.0.0.0.0.0.0.6.0.0.0.0.0.0.0.1.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa | udp |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 78.239.69.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
Files
memory/2544-0-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2544-1-0x0000000002020000-0x0000000002026000-memory.dmp
memory/2544-2-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2544-4-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2544-5-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2544-6-0x0000000000400000-0x0000000000438000-memory.dmp