Analysis Overview
SHA256
37d916a79c24f8146e6ee9d3cb888961035dc7b15077bca1a80f3fdbc013fd02
Threat Level: Known bad
The file free spoofer.exe was found to be: Known bad.
Malicious Activity Summary
Modifies visiblity of hidden/system files in Explorer
Remcos
Remcos family
Executes dropped EXE
Adds Run key to start application
Drops file in System32 directory
UPX packed file
Drops file in Windows directory
System Location Discovery: System Language Discovery
Unsigned PE
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of FindShellTrayWindow
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-12 23:53
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-12 23:53
Reported
2024-11-12 23:54
Platform
win11-20241007-en
Max time kernel
91s
Max time network
92s
Command Line
Signatures
Modifies visiblity of hidden/system files in Explorer
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" | \??\c:\windows\resources\themes\explorer.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" | \??\c:\windows\resources\svchost.exe | N/A |
Remcos
Remcos family
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\users\admin\appdata\local\temp\free spoofer.exe | N/A |
| N/A | N/A | C:\Windows\Resources\Themes\icsys.icn.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\themes\explorer.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\spoolsv.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\svchost.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\spoolsv.exe | N/A |
| N/A | N/A | \??\c:\users\admin\desktop\free spoofer.exe | N/A |
| N/A | N/A | C:\Windows\Resources\Themes\icsys.icn.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\themes\explorer.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" | \??\c:\windows\resources\themes\explorer.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" | \??\c:\windows\resources\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" | \??\c:\windows\resources\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" | \??\c:\windows\resources\themes\explorer.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\explorer.exe | \??\c:\windows\resources\themes\explorer.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\explorer.exe | \??\c:\windows\resources\svchost.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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | \??\c:\windows\resources\themes\explorer.exe | C:\Windows\Resources\Themes\icsys.icn.exe | N/A |
| File opened for modification | \??\c:\windows\resources\spoolsv.exe | \??\c:\windows\resources\themes\explorer.exe | N/A |
| File opened for modification | \??\c:\windows\resources\svchost.exe | \??\c:\windows\resources\spoolsv.exe | N/A |
| File opened for modification | C:\Windows\Resources\tjud.exe | \??\c:\windows\resources\themes\explorer.exe | N/A |
| File opened for modification | C:\Windows\Resources\Themes\icsys.icn.exe | C:\Users\Admin\Desktop\free spoofer.exe | N/A |
| File opened for modification | C:\Windows\Resources\Themes\icsys.icn.exe | C:\Users\Admin\AppData\Local\Temp\free spoofer.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Resources\Themes\icsys.icn.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\windows\resources\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\users\admin\desktop\free spoofer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\free spoofer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\windows\resources\themes\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\windows\resources\spoolsv.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\windows\resources\spoolsv.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\Desktop\free spoofer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\Resources\Themes\icsys.icn.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\windows\resources\themes\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\users\admin\appdata\local\temp\free spoofer.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\windows\resources\svchost.exe | N/A |
| N/A | N/A | \??\c:\windows\resources\themes\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\users\admin\appdata\local\temp\free spoofer.exe | N/A |
| N/A | N/A | \??\c:\users\admin\desktop\free spoofer.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\users\admin\appdata\local\temp\free spoofer.exe | N/A |
| N/A | N/A | \??\c:\users\admin\desktop\free spoofer.exe | N/A |
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\free spoofer.exe
"C:\Users\Admin\AppData\Local\Temp\free spoofer.exe"
\??\c:\users\admin\appdata\local\temp\free spoofer.exe
"c:\users\admin\appdata\local\temp\free spoofer.exe "
C:\Windows\Resources\Themes\icsys.icn.exe
C:\Windows\Resources\Themes\icsys.icn.exe
\??\c:\windows\resources\themes\explorer.exe
c:\windows\resources\themes\explorer.exe
\??\c:\windows\resources\spoolsv.exe
c:\windows\resources\spoolsv.exe SE
\??\c:\windows\resources\svchost.exe
c:\windows\resources\svchost.exe
\??\c:\windows\resources\spoolsv.exe
c:\windows\resources\spoolsv.exe PR
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
C:\Users\Admin\Desktop\free spoofer.exe
"C:\Users\Admin\Desktop\free spoofer.exe"
\??\c:\users\admin\desktop\free spoofer.exe
"c:\users\admin\desktop\free spoofer.exe "
C:\Windows\Resources\Themes\icsys.icn.exe
C:\Windows\Resources\Themes\icsys.icn.exe
\??\c:\windows\resources\themes\explorer.exe
c:\windows\resources\themes\explorer.exe
Network
| Country | Destination | Domain | Proto |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp | |
| N/A | 127.0.0.1:2404 | tcp |
Files
memory/1136-0-0x0000000000400000-0x000000000041F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\free spoofer.exe
| MD5 | c84c4c9119a106ef8b03f518ac2fd77f |
| SHA1 | f5ec736878b7350476f67fcbf83c1e9b1091f8ed |
| SHA256 | 1c9e341e908b43c20f24dfe5cb449502f659dabfc9c697750ade95e1535f295b |
| SHA512 | 5ec872842a7a432271ec2b053f638d5eaf54f97be4e4ea98af34a2c927d4f7dfcfe5d98ea3fdc1405383bdffee9bf47b0b22a7b20d95df06a46dc1cee6c51ccd |
memory/3344-9-0x0000000000400000-0x000000000047D000-memory.dmp
C:\Windows\Resources\Themes\icsys.icn.exe
| MD5 | f00d658a3974a79f14e9102602bf09f9 |
| SHA1 | c4328ee2d0d6c4fd77fc40ff991209663439870a |
| SHA256 | f67a66914baca9ed1af8661252ec4fee45c10fcdfa3482197916d51bd3dfc1bd |
| SHA512 | 71c69718620da6d37de7f42cb808724f26130a10ce2526efb508364587e7d294bbf1280763fbf7656d00e33077096fecf33b96cc859631c218b406eb0be38943 |
C:\Windows\Resources\Themes\explorer.exe
| MD5 | 1ecca1479d3eb1447595d5245cf1ed05 |
| SHA1 | beb6de4c390817b59a9213e68db83ca471ab2a1b |
| SHA256 | 37761aefa554a85ae8b6629dbc4ed46a5c274c3edac2554e954e8522483d6cbb |
| SHA512 | 904b508c4866f5e2bae691dd4e7fc81b9be3ca0dcc82f4c65129aa01923356ed5d718d0019dd62e9ed76435523286987bea1361e0cf7fe6fa6962276c6668421 |
C:\Windows\Resources\spoolsv.exe
| MD5 | a4f34265ecea48cf9ee3122cbe4fab1e |
| SHA1 | d8577cdf2a1847f7f7e710ba92cf0f763b185ba1 |
| SHA256 | 945746a62e4930a9d6e81c14d3d3568f3fde41fab5763698c79fcb1fe8c0861e |
| SHA512 | fb393853bde464bd0bee730792bea925844694fe3437c7e84d6836db041cabf27d54e24a6de4df2c10fb7ea9c5aa8d1a22aa2b98df02786236d6fddaba9f45cf |
C:\Windows\Resources\svchost.exe
| MD5 | 646b1395e561613dca878dd0739cb11c |
| SHA1 | 6718a54a13cb38e9b1dce1729cebca4831b83356 |
| SHA256 | efe67e0b61adbf8c31e6b2714c16d0be6244a052d5e361c0129a360f7e381f55 |
| SHA512 | 2c031974c5d86d2d0df77763c466d401f2a90b263eced302855207e55f4627b16faa073b36cdb3025fe922e8a9e361fc04b7a300cca1d25f320ec075f461b1f0 |
memory/2336-44-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4824-45-0x0000000000400000-0x000000000041F000-memory.dmp
memory/908-46-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1136-47-0x0000000000400000-0x000000000041F000-memory.dmp
memory/3344-48-0x0000000000400000-0x000000000047D000-memory.dmp
memory/3344-49-0x0000000000400000-0x000000000047D000-memory.dmp
memory/3344-50-0x0000000000400000-0x000000000047D000-memory.dmp
memory/3344-51-0x0000000000400000-0x000000000047D000-memory.dmp
memory/4308-52-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1100-53-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1948-69-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1948-74-0x0000000000400000-0x000000000041F000-memory.dmp
memory/912-73-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1220-75-0x0000000000400000-0x000000000041F000-memory.dmp
memory/2276-76-0x0000000000400000-0x000000000047D000-memory.dmp
memory/2276-77-0x0000000000400000-0x000000000047D000-memory.dmp