Analysis Overview
SHA256
b71745bd8676d052b0d35507af40ead88f447efcae034fba84b623551c2baa3e
Threat Level: Known bad
The file a9c8cae9854449ed7e490c8de523c158 was found to be: Known bad.
Malicious Activity Summary
Detect XtremeRAT payload
XtremeRAT
Xtremerat family
Modifies Installed Components in the registry
Adds Run key to start application
Drops file in Windows directory
Program crash
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-27 17:50
Signatures
Detect XtremeRAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Xtremerat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-27 17:50
Reported
2024-02-27 17:53
Platform
win7-20240221-en
Max time kernel
148s
Max time network
146s
Command Line
Signatures
Detect XtremeRAT payload
| 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 |
XtremeRAT
Modifies Installed Components in the registry
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\InstallDir\Server.exe | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| File created | C:\Windows\InstallDir\Server.exe | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| File opened for modification | C:\Windows\InstallDir\ | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1612 wrote to memory of 2344 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 1612 wrote to memory of 2344 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 1612 wrote to memory of 2344 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 1612 wrote to memory of 2344 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 1612 wrote to memory of 2344 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe
"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
Network
| Country | Destination | Domain | Proto |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp |
Files
memory/2344-0-0x0000000010000000-0x000000001004A000-memory.dmp
memory/2344-2-0x0000000010000000-0x000000001004A000-memory.dmp
C:\Windows\InstallDir\Server.exe
| MD5 | a9c8cae9854449ed7e490c8de523c158 |
| SHA1 | 55130806c705709fc71fc1f339a11f0144ee716e |
| SHA256 | b71745bd8676d052b0d35507af40ead88f447efcae034fba84b623551c2baa3e |
| SHA512 | acd29374a508cc3e8f171d6db9a551cdc6dd1bbbe7c0b6e0b41726dd37bc35a075d704a212b8f21f673cc9594d49cd52cf2b39642bba0c2162fe3861c77491c1 |
memory/1612-6-0x0000000010000000-0x000000001004A000-memory.dmp
memory/2344-8-0x0000000010000000-0x000000001004A000-memory.dmp
memory/1612-11-0x0000000010000000-0x000000001004A000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-27 17:50
Reported
2024-02-27 17:53
Platform
win10v2004-20240226-en
Max time kernel
142s
Max time network
150s
Command Line
Signatures
Detect XtremeRAT payload
| 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 |
XtremeRAT
Modifies Installed Components in the registry
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2} | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\Server.exe" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe" | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\InstallDir\Server.exe | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| File created | C:\Windows\InstallDir\Server.exe | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
| File opened for modification | C:\Windows\InstallDir\ | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\svchost.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\svchost.exe |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4216 wrote to memory of 2368 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 4216 wrote to memory of 2368 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 4216 wrote to memory of 2368 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
| PID 4216 wrote to memory of 2368 | N/A | C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe | C:\Windows\SysWOW64\svchost.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe
"C:\Users\Admin\AppData\Local\Temp\a9c8cae9854449ed7e490c8de523c158.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2368 -ip 2368
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 480
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2368 -ip 2368
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 500
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| N/A | 10.4.73.139:1603 | tcp | |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 204.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| N/A | 10.4.73.139:1603 | tcp | |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| N/A | 10.4.73.139:1603 | tcp | |
| US | 8.8.8.8:53 | 192.178.17.96.in-addr.arpa | udp |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp | |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| N/A | 10.4.73.139:1603 | tcp | |
| N/A | 10.4.73.139:1603 | tcp |
Files
memory/2368-0-0x0000000010000000-0x000000001004A000-memory.dmp
memory/2368-3-0x0000000010000000-0x000000001004A000-memory.dmp
memory/4216-4-0x0000000010000000-0x000000001004A000-memory.dmp