File name: | AsyncClient.exe |
Full analysis: | https://app.any.run/tasks/dda4bb62-a1ae-43ba-b1c2-c6a033894856 |
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: | November 29, 2020, 21:36:30 |
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: | B627A7E635F853C374A90AC29BB881B7 |
SHA1: | B801AF58191879DAC39CAC27A7C51B4E9D4E8007 |
SHA256: | D4090FB2AA5A1671DB4A28F2DC95B2789E1F7B3FCB9B4B3312AF36639F01B6C1 |
SSDEEP: | 768:EuEUVTnk6gWXWUr+C1mo2qDbKjGKG6PIyzjbFgX3iKPrPVh3qBDZTx:EuEUVTn8Y2qKYDy3bCXSKDVOdTx |
.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) |
AssemblyVersion: | 1.0.0.0 |
---|---|
ProductVersion: | 1.0.0.0 |
ProductName: | - |
OriginalFileName: | Stub.exe |
LegalTrademarks: | - |
LegalCopyright: | - |
InternalName: | Stub.exe |
FileVersion: | 1.0.0.0 |
FileDescription: | - |
CompanyName: | - |
Comments: | - |
CharacterSet: | Unicode |
LanguageCode: | Neutral |
FileSubtype: | - |
ObjectFileType: | Executable application |
FileOS: | Win32 |
FileFlags: | (none) |
FileFlagsMask: | 0x003f |
ProductVersionNumber: | 1.0.0.0 |
FileVersionNumber: | 1.0.0.0 |
Subsystem: | Windows GUI |
SubsystemVersion: | 4 |
ImageVersion: | - |
OSVersion: | 4 |
EntryPoint: | 0xc74e |
UninitializedDataSize: | - |
InitializedDataSize: | 2560 |
CodeSize: | 43008 |
LinkerVersion: | 8 |
PEType: | PE32 |
TimeStamp: | 2020:05:10 07:24:51+02:00 |
MachineType: | Intel 386 or later, and compatibles |
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 | 0x0000A754 | 0x0000A800 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.5092 |
.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 |
---|---|---|---|---|
2868 | "C:\Users\admin\AppData\Local\Temp\AsyncClient.exe" | C:\Users\admin\AppData\Local\Temp\AsyncClient.exe | explorer.exe | |
User: admin Integrity Level: MEDIUM Exit code: 0 Version: 1.0.0.0 | ||||
2808 | cmd /c ""C:\Users\admin\AppData\Local\Temp\tmpE1C0.tmp.bat"" | C:\Windows\system32\cmd.exe | — | AsyncClient.exe |
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 1 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) | ||||
3416 | timeout 3 | C:\Windows\system32\timeout.exe | — | cmd.exe |
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: timeout - pauses command processing Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) | ||||
1144 | "C:\Users\admin\AppData\Local\Temp\blake.exe" | C:\Users\admin\AppData\Local\Temp\blake.exe | cmd.exe | |
User: admin Integrity Level: MEDIUM Version: 1.0.0.0 |
(PID) Process: | (2868) AsyncClient.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\13B\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US | |||
(PID) Process: | (2868) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
Operation: | write | Name: | blake |
Value: "C:\Users\admin\AppData\Local\Temp\blake.exe" | |||
(PID) Process: | (1144) blake.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\13B\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US |
PID | Process | Filename | Type | |
---|---|---|---|---|
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Cab209.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Tar20A.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Cab21B.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Tar21C.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Cab2E8.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Tar2E9.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Cab3B5.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Tar3B6.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Cab434.tmp | — | |
MD5:— | SHA256:— | |||
1144 | blake.exe | C:\Users\admin\AppData\Local\Temp\Tar435.tmp | — | |
MD5:— | SHA256:— |
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
---|---|---|---|---|---|---|---|---|---|
1144 | blake.exe | GET | 200 | 205.185.216.42:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | compressed | 57.5 Kb | whitelisted |
1144 | blake.exe | GET | 304 | 205.185.216.42:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | compressed | 57.5 Kb | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
---|---|---|---|---|---|---|
1144 | blake.exe | 205.185.216.42:80 | www.download.windowsupdate.com | Highwinds Network Group, Inc. | US | whitelisted |
1144 | blake.exe | 24.240.72.240:5353 | chair123.ddns.net | Charter Communications | US | malicious |
Domain | IP | Reputation |
---|---|---|
chair123.ddns.net |
| malicious |
www.download.windowsupdate.com |
| whitelisted |
dns.msftncsi.com |
| shared |
PID | Process | Class | Message |
---|---|---|---|
— | — | Potentially Bad Traffic | ET POLICY DNS Query to DynDNS Domain *.ddns .net |
1144 | blake.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
1144 | blake.exe | A Network Trojan was detected | ET TROJAN Observed Malicious SSL Cert (AsyncRAT Server) |
1144 | blake.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
1144 | blake.exe | A Network Trojan was detected | SUSPICIOUS [PTsecurity] Possible AsyncRAT SSL certificate |