Analysis Overview
SHA256
d2c04698e0f237d4d66fc4e6be0c4b8f6c8fd156f237352e0d30f4b72474b714
Threat Level: Known bad
The file csrss.exe was found to be: Known bad.
Malicious Activity Summary
Gh0strat
Gh0st RAT payload
UPX packed file
Executes dropped EXE
Checks computer location settings
Deletes itself
Enumerates connected drives
Drops file in Program Files directory
Enumerates physical storage devices
Unsigned PE
Program crash
Suspicious use of WriteProcessMemory
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Modifies registry class
Suspicious use of FindShellTrayWindow
Checks SCSI registry key(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-04 21:59
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-04 21:58
Reported
2024-06-04 22:05
Platform
win10v2004-20240426-en
Max time kernel
193s
Max time network
189s
Command Line
Signatures
Gh0st RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Gh0strat
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\csrss.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.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 |
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Enumerates connected drives
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | C:\Users\Admin\AppData\Local\Temp\csrss.exe | N/A |
| File opened for modification | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | C:\Users\Admin\AppData\Local\Temp\csrss.exe | N/A |
Enumerates physical storage devices
Program crash
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\ProcessorNameString | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\2 | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Set value (int) | \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7" | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000_Classes\Local Settings | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\csrss.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\csrss.exe
"C:\Users\Admin\AppData\Local\Temp\csrss.exe"
C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe
"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4100 -ip 4100
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4100 -s 1064
C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe
"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1744 -ip 1744
C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe
"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"
C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe
"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4236 -ip 4236
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1744 -s 184
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4236 -s 568
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 3744 -ip 3744
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 552
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {c82192ee-6cb5-4bc0-9ef0-fb818773790a} -Embedding
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /7
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.exiles.site | udp |
| HK | 154.201.74.240:9090 | www.exiles.site | tcp |
| US | 8.8.8.8:53 | 240.74.201.154.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 94.65.42.20.in-addr.arpa | udp |
Files
memory/4100-1-0x0000000000C00000-0x0000000000E00000-memory.dmp
memory/4100-3-0x0000000000400000-0x0000000000461000-memory.dmp
memory/4100-2-0x0000000002A00000-0x0000000002A61000-memory.dmp
memory/4100-4-0x0000000010000000-0x0000000010362000-memory.dmp
memory/4100-8-0x0000000010000000-0x0000000010362000-memory.dmp
memory/4100-9-0x0000000000400000-0x0000000000863000-memory.dmp
memory/4100-7-0x0000000010000000-0x0000000010362000-memory.dmp
memory/1744-25-0x0000000000400000-0x0000000000863000-memory.dmp
memory/4236-31-0x0000000000400000-0x0000000000863000-memory.dmp
memory/4236-30-0x0000000010000000-0x0000000010362000-memory.dmp
memory/4236-34-0x0000000010000000-0x0000000010362000-memory.dmp
memory/4236-35-0x0000000010000000-0x0000000010362000-memory.dmp
memory/4100-37-0x0000000000400000-0x0000000000461000-memory.dmp
memory/4100-36-0x0000000000400000-0x0000000000863000-memory.dmp
memory/1744-53-0x0000000000400000-0x0000000000863000-memory.dmp
memory/1464-55-0x0000000010000000-0x0000000010362000-memory.dmp
memory/1464-56-0x0000000010000000-0x0000000010362000-memory.dmp
memory/3744-57-0x0000000000400000-0x0000000000863000-memory.dmp
memory/1464-58-0x00000000751C0000-0x00000000751F9000-memory.dmp
memory/1464-59-0x0000000010000000-0x0000000010362000-memory.dmp
memory/1464-60-0x0000000000400000-0x0000000000863000-memory.dmp
memory/3732-76-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-77-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-78-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-88-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-87-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-86-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-85-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-84-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-83-0x0000023AC7310000-0x0000023AC7311000-memory.dmp
memory/3732-82-0x0000023AC7310000-0x0000023AC7311000-memory.dmp