What is rarext64.dll?
rarext64.dll is part of WinRAR and developed by Alexander Roshal according to the rarext64.dll version information.
rarext64.dll's description is "WinRAR shell extension"
rarext64.dll is digitally signed by win.rar GmbH.
rarext64.dll is usually located in the 'C:\Program Files (x86)\WinRAR\' folder.
None of the anti-virus scanners at VirusTotal reports anything malicious about rarext64.dll.
If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.
Vendor and version information [?]
The following is the available information on rarext64.dll:
| Property | Value |
|---|---|
| Product name | WinRAR |
| Company name | Alexander Roshal |
| File description | WinRAR shell extension |
| Internal name | WinRAR shell extension |
| Original filename | RarExt.dll |
| Legal copyright | Copyright © Alexander Roshal 1993-2019 |
| Product version | 5.70.0 |
| File version | 5.70.0 |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | WinRAR |
| Company name | Alexander Roshal |
| File description | WinRAR shell extension |
| Internal name | WinRAR shell extension |
| Original filename | RarExt.dll |
| Legal copyright | Copyright © Alexander Roshal 1993-2.. |
| Product version | 5.70.0 |
| File version | 5.70.0 |
Digital signatures [?]
rarext64.dll has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | win.rar GmbH |
| Certificate issuer name | COMODO RSA Code Signing CA |
| Certificate serial number | 529e3f9fcf7d58d520d607ab74395002 |
VirusTotal report
None of the 62 anti-virus programs at VirusTotal detected the rarext64.dll file.
Sandbox Report
The following information was gathered by executing the file inside Cuckoo Sandbox.
Summary
Successfully executed process in sandbox.
Summary
{
"dll_loaded": [
"kernel32",
"api-ms-win-core-fibers-l1-1-1",
"api-ms-win-core-localization-l1-2-1",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll",
"API-MS-Win-Core-LocalRegistry-L1-1-0.dll",
"rpcrt4.dll",
"ole32.dll",
"SETUPAPI.dll",
"api-ms-win-core-synch-l1-2-0",
"imm32.dll"
],
"file_opened": [
"C:\\Windows\\winsxs\\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac\\comctl32.dll",
"C:\\Windows\\System32\\ntmarta.dll",
"C:\\Windows\\winsxs\\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll"
],
"regkey_opened": [
"HKEY_CURRENT_USER\\Software\\WinRAR\\General",
"HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\WinRAR.exe"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\WinRAR.ini",
"C:\\Users\\cuck\\AppData\\Roaming\\WinRAR",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\WinRAR.exe",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll.manifest"
],
"file_failed": [
"C:\\Windows\\System32\\rarext.lng"
],
"command_line": [
"\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll,DllMain"
],
"file_read": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\SourcePath",
"HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\OOBEInProgress",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b5-70f9-11e8-b07b-806e6f6e6963}\\Generation",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b6-70f9-11e8-b07b-806e6f6e6963}\\Generation",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorUseSystemHeap",
"HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\SystemSetupInProgress",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\UseOldHostResolutionOrder",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\ComputerName\\ActiveComputerName\\ComputerName",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\DevicePath",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\SQMClient\\Windows\\CEIPEnable",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b5-70f9-11e8-b07b-806e6f6e6963}\\Data",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b6-70f9-11e8-b07b-806e6f6e6963}\\Data",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Rpc\\MaxRpcSize",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\UseHostnameAsAlias",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorSystemHeapIsPrivate",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\LdapClientIntegrity"
]
}Generic
[
{
"process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
"process_name": "rundll32.exe",
"pid": 2420,
"summary": {
"dll_loaded": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll"
],
"file_opened": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll"
],
"command_line": [
"\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll,DllMain"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll.manifest"
],
"file_read": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
]
},
"first_seen": 1603219986.6875,
"ppid": 1268
},
{
"process_path": "C:\\Windows\\System32\\lsass.exe",
"process_name": "lsass.exe",
"pid": 476,
"summary": {},
"first_seen": 1603219986.328125,
"ppid": 376
},
{
"process_path": "C:\\Windows\\System32\\rundll32.exe",
"process_name": "rundll32.exe",
"pid": 2588,
"summary": {
"dll_loaded": [
"kernel32",
"api-ms-win-core-fibers-l1-1-1",
"api-ms-win-core-localization-l1-2-1",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll",
"API-MS-Win-Core-LocalRegistry-L1-1-0.dll",
"rpcrt4.dll",
"ole32.dll",
"SETUPAPI.dll",
"api-ms-win-core-synch-l1-2-0",
"imm32.dll"
],
"file_opened": [
"C:\\Windows\\winsxs\\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac\\comctl32.dll",
"C:\\Windows\\System32\\ntmarta.dll",
"C:\\Windows\\winsxs\\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac"
],
"regkey_opened": [
"HKEY_CURRENT_USER\\Software\\WinRAR\\General",
"HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\WinRAR.exe"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\WinRAR.ini",
"C:\\Users\\cuck\\AppData\\Roaming\\WinRAR",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\WinRAR.exe",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2.bin.dll.manifest"
],
"file_failed": [
"C:\\Windows\\System32\\rarext.lng"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\SourcePath",
"HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\OOBEInProgress",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b5-70f9-11e8-b07b-806e6f6e6963}\\Generation",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b6-70f9-11e8-b07b-806e6f6e6963}\\Generation",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorUseSystemHeap",
"HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\SystemSetupInProgress",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\UseOldHostResolutionOrder",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\ComputerName\\ActiveComputerName\\ComputerName",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\DevicePath",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\SQMClient\\Windows\\CEIPEnable",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b5-70f9-11e8-b07b-806e6f6e6963}\\Data",
"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2\\CPC\\Volume\\{3f5cc1b6-70f9-11e8-b07b-806e6f6e6963}\\Data",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Rpc\\MaxRpcSize",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\UseHostnameAsAlias",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorSystemHeapIsPrivate",
"HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\LDAP\\LdapClientIntegrity"
]
},
"first_seen": 1603219986.84375,
"ppid": 2420
}
]Signatures
[
{
"markcount": 1,
"families": [],
"description": "This executable has a PDB path",
"severity": 1,
"marks": [
{
"category": "pdb_path",
"ioc": "D:\\Projects\\WinRAR\\rarext\\build\\64\\Release\\rarext.pdb",
"type": "ioc",
"description": null
}
],
"references": [],
"name": "has_pdb"
},
{
"markcount": 1,
"families": [],
"description": "Checks amount of memory in system, this can be used to detect virtual machines that have a low amount of memory available",
"severity": 1,
"marks": [
{
"call": {
"category": "system",
"status": 1,
"stacktrace": [],
"api": "GlobalMemoryStatusEx",
"return_value": 1,
"arguments": {},
"time": 1603219988.93775,
"tid": 2820,
"flags": {}
},
"pid": 2588,
"type": "call",
"cid": 226
}
],
"references": [],
"name": "antivm_memory_available"
},
{
"markcount": 1,
"families": [],
"description": "The executable contains unknown PE section names indicative of a packer (could be a false positive)",
"severity": 1,
"marks": [
{
"category": "section",
"ioc": ".gfids",
"type": "ioc",
"description": null
}
],
"references": [],
"name": "pe_features"
},
{
"markcount": 2,
"families": [],
"description": "The binary likely contains encrypted or compressed data indicative of a packer",
"severity": 2,
"marks": [
{
"entropy": 7.507955836175135,
"section": {
"size_of_data": "0x00019e00",
"virtual_address": "0x00083000",
"entropy": 7.507955836175135,
"name": ".rsrc",
"virtual_size": "0x00019c38"
},
"type": "generic",
"description": "A section with a high entropy has been found"
},
{
"entropy": 0.20333988212180745,
"type": "generic",
"description": "Overall entropy of this PE file is high"
}
],
"references": [
"http:\/\/www.forensickb.com\/2013\/03\/file-entropy-explained.html",
"http:\/\/virii.es\/U\/Using%20Entropy%20Analysis%20to%20Find%20Encrypted%20and%20Packed%20Malware.pdf"
],
"name": "packer_entropy"
}
]Yara
The Yara rules did not detect anything in the file.
Network
{
"tls": [],
"udp": [
{
"src": "192.168.56.101",
"dst": "192.168.56.255",
"offset": 546,
"time": 3.142219066619873,
"dport": 137,
"sport": 137
},
{
"src": "192.168.56.101",
"dst": "192.168.56.255",
"offset": 5226,
"time": 9.141398906707764,
"dport": 138,
"sport": 138
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 7070,
"time": 3.049838066101074,
"dport": 5355,
"sport": 51001
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 7398,
"time": 1.049710988998413,
"dport": 5355,
"sport": 53595
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 7726,
"time": 3.0950000286102295,
"dport": 5355,
"sport": 53848
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 8054,
"time": 1.5510540008544922,
"dport": 5355,
"sport": 54255
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 8382,
"time": -0.10004615783691406,
"dport": 5355,
"sport": 55314
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 8710,
"time": 1.5625109672546387,
"dport": 1900,
"sport": 1900
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 24978,
"time": 1.0797920227050781,
"dport": 3702,
"sport": 49152
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 33362,
"time": 3.0971620082855225,
"dport": 1900,
"sport": 53598
}
],
"dns_servers": [],
"http": [],
"icmp": [],
"smtp": [],
"tcp": [],
"smtp_ex": [],
"mitm": [],
"hosts": [],
"pcap_sha256": "4e55dd1f3a2cb57ea4d51d52efae8dfefbfc391619d2c4ae20e38ea05a45e872",
"dns": [],
"http_ex": [],
"domains": [],
"dead_hosts": [],
"sorted_pcap_sha256": "3e3413805601ac7abba03f2349833fc17b85761ae46c8c8642cf664d57c3f162",
"irc": [],
"https_ex": []
}Screenshots
Other files also named rarext64.dll
rarext64.dll (4 votes)
Hashes [?]
| Property | Value |
|---|---|
| MD5 | fa8a7c3e73e43dbe58924270f9dad89c |
| SHA256 | 3d76f410c174ecf3b15590ac74d5161c4189facc721abf6f120b28a8a51904b2 |
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Malware or legitimate?
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Comments
Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.
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