File name: | AsyncClient.exe |
Full analysis: | https://app.any.run/tasks/ced1ba9a-c754-4f58-bc67-e85035e282fd |
Verdict: | Malicious activity |
Threats: | AsyncRAT is a RAT that can monitor and remotely control infected systems. This malware was introduced on Github as a legitimate open-source remote administration software, but hackers use it for its many powerful malicious functions. |
Analysis date: | April 01, 2023, 09:35:49 |
OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
Tags: | |
Indicators: | |
MIME: | application/x-dosexec |
File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows |
MD5: | 5C8A6EDB1B7528F679E05C2960E91FA4 |
SHA1: | 7233AD5323A468989EF31E92A214FD24B912CA9F |
SHA256: | 0B5B422C6799C38892F63784BE12F3A5C3700838EA9A2C9A746784978D809CA2 |
SSDEEP: | 768:Hu/6ZTgoiziWUUM9rmo2qrrKjGKG6PIyzjbFgX3im/E6UrvJYKdpk/eBDZjx:Hu/6ZTgle2mKYDy3bCXSm/ivJ8/wdjx |
.exe | | | Generic CIL Executable (.NET, Mono, etc.) (56.7) |
---|---|---|
.exe | | | Win64 Executable (generic) (21.3) |
.scr | | | Windows screen saver (10.1) |
.dll | | | Win32 Dynamic Link Library (generic) (5) |
.exe | | | Win32 Executable (generic) (3.4) |
MachineType: | Intel 386 or later, and compatibles |
---|---|
TimeStamp: | 2020:05:10 05:24:51+00:00 |
ImageFileCharacteristics: | Executable, 32-bit |
PEType: | PE32 |
LinkerVersion: | 8 |
CodeSize: | 43008 |
InitializedDataSize: | 2560 |
UninitializedDataSize: | - |
EntryPoint: | 0xc73e |
OSVersion: | 4 |
ImageVersion: | - |
SubsystemVersion: | 4 |
Subsystem: | Windows GUI |
FileVersionNumber: | 1.0.0.0 |
ProductVersionNumber: | 1.0.0.0 |
FileFlagsMask: | 0x003f |
FileFlags: | (none) |
FileOS: | Win32 |
ObjectFileType: | Executable application |
FileSubtype: | - |
LanguageCode: | Neutral |
CharacterSet: | Unicode |
Comments: | - |
CompanyName: | - |
FileDescription: | - |
FileVersion: | 1.0.0.0 |
InternalName: | Stub.exe |
LegalCopyright: | - |
LegalTrademarks: | - |
OriginalFileName: | Stub.exe |
ProductName: | - |
ProductVersion: | 1.0.0.0 |
AssemblyVersion: | 1.0.0.0 |
Architecture: | IMAGE_FILE_MACHINE_I386 |
---|---|
Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
Compilation Date: | 10-May-2020 05:24:51 |
Comments: | - |
CompanyName: | - |
FileDescription: | - |
FileVersion: | 1.0.0.0 |
InternalName: | Stub.exe |
LegalCopyright: | - |
LegalTrademarks: | - |
OriginalFilename: | Stub.exe |
ProductName: | - |
ProductVersion: | 1.0.0.0 |
Assembly Version: | 1.0.0.0 |
Magic number: | MZ |
---|---|
Bytes on last page of file: | 0x0090 |
Pages in file: | 0x0003 |
Relocations: | 0x0000 |
Size of header: | 0x0004 |
Min extra paragraphs: | 0x0000 |
Max extra paragraphs: | 0xFFFF |
Initial SS value: | 0x0000 |
Initial SP value: | 0x00B8 |
Checksum: | 0x0000 |
Initial IP value: | 0x0000 |
Initial CS value: | 0x0000 |
Overlay number: | 0x0000 |
OEM identifier: | 0x0000 |
OEM information: | 0x0000 |
Address of NE header: | 0x00000080 |
Signature: | PE |
---|---|
Machine: | IMAGE_FILE_MACHINE_I386 |
Number of sections: | 3 |
Time date stamp: | 10-May-2020 05:24:51 |
Pointer to Symbol Table: | 0x00000000 |
Number of symbols: | 0 |
Size of Optional Header: | 0x00E0 |
Characteristics: |
|
Name | Virtual Address | Virtual Size | Raw Size | Charateristics | Entropy |
---|---|---|---|---|---|
.text | 0x00002000 | 0x0000A744 | 0x0000A800 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.50554 |
.rsrc | 0x0000E000 | 0x000007FF | 0x00000800 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 4.88507 |
.reloc | 0x00010000 | 0x0000000C | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ | 0.0815394 |
Title | Entropy | Size | Codepage | Language | Type |
---|---|---|---|---|---|
1 | 5.22615 | 1171 | UNKNOWN | UNKNOWN | RT_MANIFEST |
mscoree.dll |
PID | CMD | Path | Indicators | Parent process | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2640 | "C:\Users\admin\Desktop\AsyncClient.exe" | C:\Users\admin\Desktop\AsyncClient.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Version: 1.0.0.0 Modules
AsyncRat(PID) Process(2640) AsyncClient.exe C2 (1)6.tcp.eu.ngrok.io Ports (1)15146 BotnetDefault Version0.5.7B Options AutoRunfalse MutexAsyncMutex_6SI8OkPnk InstallFolder%AppData% BSoDfalse AntiVMfalse Certificates Cert1MIIE8jCCAtqgAwIBAgIQANvmXQ6HRZcVJVzDXLlKqzANBgkqhkiG9w0BAQ0FADAaMRgwFgYDVQQDDA9Bc3luY1JBVCBTZXJ2ZXIwIBcNMjMwMzMwMDkyNDA4WhgPOTk5OTEyMzEyMzU5NTlaMBoxGDAWBgNVBAMMD0FzeW5jUkFUIFNlcnZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAILb3mT1/Edq5h+qvms6Dbog1c9Uuuh/FutZTnq5E/8JZcGeOs91ddGZxR0lJgsU6PP/NflKPXve... Server_SignatureEN4rUJCRt0XE4Ji5WAgE4s1/shIETQmSkzftkxfOyzigNAW1sDCCUuUL3ypqu8P24JhIV38IUgIvDKBMjTG9ljEu3a5m4QoSOCjgNjl5ut34jJtLGGnowgOdEIqcL1d+2DlcS5uDwr0bTbD2DZThPi1Ub99MmJUTR/nCFaV4a33cVdXTvKQJSEbZg/HRbxIAmY6rPVCpd4AmbQsvVv78zd3k4OtGE2U1k3Bz013uYHY2nvTU5YjNKIAFIanHXjYj7hLGoZvZszHdFawOWz7GEa/jCd74f6yljeOgakiwhCff... Keys AES3b16875ec95f45f3d556febe4d4bf10002bdd0dce9b7dcabe88d0daac870ae0f Saltbfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941 | |||||||||||||||
372 | "C:\Windows\System32\cmd.exe" /k START "" "C:\Users\admin\Desktop\AsyncClient.exe" & EXIT | C:\Windows\System32\cmd.exe | AsyncClient.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows Command Processor Exit code: 0 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
3992 | "C:\Users\admin\Desktop\AsyncClient.exe" | C:\Users\admin\Desktop\AsyncClient.exe | cmd.exe | ||||||||||||
User: admin Integrity Level: HIGH Version: 1.0.0.0 Modules
AsyncRat(PID) Process(3992) AsyncClient.exe C2 (1)6.tcp.eu.ngrok.io Ports (1)15146 BotnetDefault Version0.5.7B Options AutoRunfalse MutexAsyncMutex_6SI8OkPnk InstallFolder%AppData% BSoDfalse AntiVMfalse Certificates Cert1MIIE8jCCAtqgAwIBAgIQANvmXQ6HRZcVJVzDXLlKqzANBgkqhkiG9w0BAQ0FADAaMRgwFgYDVQQDDA9Bc3luY1JBVCBTZXJ2ZXIwIBcNMjMwMzMwMDkyNDA4WhgPOTk5OTEyMzEyMzU5NTlaMBoxGDAWBgNVBAMMD0FzeW5jUkFUIFNlcnZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAILb3mT1/Edq5h+qvms6Dbog1c9Uuuh/FutZTnq5E/8JZcGeOs91ddGZxR0lJgsU6PP/NflKPXve... Server_SignatureEN4rUJCRt0XE4Ji5WAgE4s1/shIETQmSkzftkxfOyzigNAW1sDCCUuUL3ypqu8P24JhIV38IUgIvDKBMjTG9ljEu3a5m4QoSOCjgNjl5ut34jJtLGGnowgOdEIqcL1d+2DlcS5uDwr0bTbD2DZThPi1Ub99MmJUTR/nCFaV4a33cVdXTvKQJSEbZg/HRbxIAmY6rPVCpd4AmbQsvVv78zd3k4OtGE2U1k3Bz013uYHY2nvTU5YjNKIAFIanHXjYj7hLGoZvZszHdFawOWz7GEa/jCd74f6yljeOgakiwhCff... Keys AES3b16875ec95f45f3d556febe4d4bf10002bdd0dce9b7dcabe88d0daac870ae0f Saltbfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941 | |||||||||||||||
4508 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
4540 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
4592 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
4636 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
4660 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
3444 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
| |||||||||||||||
3592 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | — | AsyncClient.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Microsoft .NET Assembly Registration Utility Exit code: 4294967295 Version: 4.0.30319.34209 built by: FX452RTMGDR Modules
|
(PID) Process: | (2640) AsyncClient.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\16D\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US | |||
(PID) Process: | (2640) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
Operation: | write | Name: | ProxyBypass |
Value: 1 | |||
(PID) Process: | (2640) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
Operation: | write | Name: | IntranetName |
Value: 1 | |||
(PID) Process: | (2640) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
Operation: | write | Name: | UNCAsIntranet |
Value: 1 | |||
(PID) Process: | (2640) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
Operation: | write | Name: | AutoDetect |
Value: 0 | |||
(PID) Process: | (3992) AsyncClient.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\16D\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US |
PID | Process | Filename | Type | |
---|---|---|---|---|
2640 | AsyncClient.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506 | binary | |
MD5:C0003A66481B18DFE113884C57000C67 | SHA256:54B7EE188E798EBDCD96E3A57ABBACD190800999A1B3F00FA65DB806EB8A3867 | |||
2640 | AsyncClient.exe | C:\Users\admin\AppData\Local\Temp\TarA313.tmp | cat | |
MD5:BE2BEC6E8C5653136D3E72FE53C98AA3 | SHA256:1919AAB2A820642490169BDC4E88BD1189E22F83E7498BF8EBDFB62EC7D843FD | |||
2640 | AsyncClient.exe | C:\Users\admin\AppData\Local\Temp\CabA312.tmp | compressed | |
MD5:E71C8443AE0BC2E282C73FAEAD0A6DD3 | SHA256:95B0A5ACC5BF70D3ABDFD091D0C9F9063AA4FDE65BD34DBF16786082E1992E72 | |||
2640 | AsyncClient.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506 | compressed | |
MD5:E71C8443AE0BC2E282C73FAEAD0A6DD3 | SHA256:95B0A5ACC5BF70D3ABDFD091D0C9F9063AA4FDE65BD34DBF16786082E1992E72 |
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
---|---|---|---|---|---|---|---|---|---|
2640 | AsyncClient.exe | GET | 200 | 208.111.186.0:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?c810e0bd9c55fa4e | US | compressed | 61.1 Kb | whitelisted |
2640 | AsyncClient.exe | GET | 200 | 208.111.186.0:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?f4129ba81ce0e533 | US | compressed | 61.1 Kb | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
---|---|---|---|---|---|---|
3992 | AsyncClient.exe | 3.68.171.119:15146 | 6.tcp.eu.ngrok.io | AMAZON-02 | DE | malicious |
2640 | AsyncClient.exe | 3.68.171.119:15146 | 6.tcp.eu.ngrok.io | AMAZON-02 | DE | malicious |
2640 | AsyncClient.exe | 208.111.186.0:80 | ctldl.windowsupdate.com | LLNW | US | unknown |
— | — | 3.68.171.119:15146 | 6.tcp.eu.ngrok.io | AMAZON-02 | DE | malicious |
Domain | IP | Reputation |
---|---|---|
6.tcp.eu.ngrok.io |
| malicious |
ctldl.windowsupdate.com |
| whitelisted |
PID | Process | Class | Message |
---|---|---|---|
— | — | Potential Corporate Privacy Violation | ET INFO DNS Query to a *.ngrok domain (ngrok.io) |