File name: | AsyncClient.exe |
Full analysis: | https://app.any.run/tasks/d31c4d2e-fb9e-4b76-a63c-50e7b541c2f0 |
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: | August 08, 2020, 16:26:01 |
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: | 1775F13E72D64CF024F0A6A2A385A031 |
SHA1: | 7453E2E059104B3B3B2AA595FCC4268BC145D773 |
SHA256: | 1640F0429431A924854A15C8A3B2FE1DDFA45E316096B3F67764A069FA56F88F |
SSDEEP: | 768:suK49TH4EjZWUR+ejmo2qr3qbJQ1DPIRgVCd2hcj0brdTFv/DBQaLj2xSkUpMHBf:suK49THf52ZeCmVLKIbr5p/DBQdSkmM9 |
.exe | | | Generic CIL Executable (.NET, Mono, etc.) (82.9) |
---|---|---|
.dll | | | Win32 Dynamic Link Library (generic) (7.4) |
.exe | | | Win32 Executable (generic) (5.1) |
.exe | | | Generic Win/DOS Executable (2.2) |
.exe | | | DOS Executable Generic (2.2) |
MachineType: | Intel 386 or later, and compatibles |
---|---|
TimeStamp: | 2020:05:10 07:24:51+02:00 |
PEType: | PE32 |
LinkerVersion: | 8 |
CodeSize: | 45568 |
InitializedDataSize: | 3072 |
UninitializedDataSize: | - |
EntryPoint: | 0xd09e |
OSVersion: | 4 |
ImageVersion: | - |
SubsystemVersion: | 4 |
Subsystem: | Windows GUI |
FileVersionNumber: | 6.2.19041.1 |
ProductVersionNumber: | 6.2.19041.1 |
FileFlagsMask: | 0x003f |
FileFlags: | (none) |
FileOS: | Win32 |
ObjectFileType: | Executable application |
FileSubtype: | - |
LanguageCode: | Neutral |
CharacterSet: | Unicode |
Comments: | - |
CompanyName: | Microsoft Corporation |
FileDescription: | COM Surrogate |
FileVersion: | 6.2.19041.1 |
InternalName: | dllhost.exe |
LegalCopyright: | © Microsoft Corporation. All rights reserved. |
LegalTrademarks: | Microsoft Corporation |
OriginalFileName: | dllhost.exe |
ProductName: | Microsoft® Windows® Operating System |
ProductVersion: | 6.2.19041.1 |
AssemblyVersion: | 6.2.19041.1 |
Architecture: | IMAGE_FILE_MACHINE_I386 |
---|---|
Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
Compilation Date: | 10-May-2020 05:24:51 |
Comments: | - |
CompanyName: | Microsoft Corporation |
FileDescription: | COM Surrogate |
FileVersion: | 6.2.19041.1 |
InternalName: | dllhost.exe |
LegalCopyright: | © Microsoft Corporation. All rights reserved. |
LegalTrademarks: | Microsoft Corporation |
OriginalFilename: | dllhost.exe |
ProductName: | Microsoft® Windows® Operating System |
ProductVersion: | 6.2.19041.1 |
Assembly Version: | 6.2.19041.1 |
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 | 0x0000B0A4 | 0x0000B200 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.61923 |
.rsrc | 0x0000E000 | 0x00000928 | 0x00000A00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 5.03604 |
.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 | Latin 1 / Western European | UNKNOWN | RT_MANIFEST |
mscoree.dll |
PID | CMD | Path | Indicators | Parent process |
---|---|---|---|---|
2296 | "C:\Users\admin\AppData\Local\Temp\AsyncClient.exe" | C:\Users\admin\AppData\Local\Temp\AsyncClient.exe | explorer.exe | |
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: COM Surrogate Exit code: 0 Version: 6.2.19041.1 | ||||
2768 | cmd /c ""C:\Users\admin\AppData\Local\Temp\tmp19CD.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) | ||||
1776 | 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) | ||||
1372 | "C:\Users\admin\AppData\Roaming\dllhost.exe" | C:\Users\admin\AppData\Roaming\dllhost.exe | cmd.exe | |
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: COM Surrogate Exit code: 0 Version: 6.2.19041.1 | ||||
1336 | "C:\Windows\System32\cmd.exe" /k START "" "C:\Users\admin\AppData\Roaming\dllhost.exe" & EXIT | C:\Windows\System32\cmd.exe | dllhost.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) | ||||
540 | "C:\Users\admin\AppData\Roaming\dllhost.exe" | C:\Users\admin\AppData\Roaming\dllhost.exe | cmd.exe | |
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: COM Surrogate Version: 6.2.19041.1 |
PID | Process | Filename | Type | |
---|---|---|---|---|
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Cab6FBD.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Tar6FBE.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Cab6FDE.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Tar6FDF.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Cab70AB.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Tar70AC.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Cab710B.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Tar710C.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Cab716B.tmp | — | |
MD5:— | SHA256:— | |||
1372 | dllhost.exe | C:\Users\admin\AppData\Local\Temp\Tar717B.tmp | — | |
MD5:— | SHA256:— |
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
---|---|---|---|---|---|---|---|---|---|
540 | dllhost.exe | GET | 304 | 93.184.221.240:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | — | — | whitelisted |
540 | dllhost.exe | GET | 304 | 93.184.221.240:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | — | — | whitelisted |
540 | dllhost.exe | GET | 304 | 93.184.221.240:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | — | — | whitelisted |
1372 | dllhost.exe | GET | 200 | 2.16.186.81:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | unknown | compressed | 56.7 Kb | whitelisted |
540 | dllhost.exe | GET | 304 | 93.184.221.240:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | — | — | whitelisted |
1372 | dllhost.exe | GET | 304 | 2.16.186.81:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | unknown | compressed | 56.7 Kb | whitelisted |
1372 | dllhost.exe | GET | 304 | 2.16.186.81:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | unknown | compressed | 56.7 Kb | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
---|---|---|---|---|---|---|
1372 | dllhost.exe | 2.16.186.81:80 | www.download.windowsupdate.com | Akamai International B.V. | — | whitelisted |
1372 | dllhost.exe | 3.125.209.94:17483 | 0.tcp.eu.ngrok.io | — | US | malicious |
540 | dllhost.exe | 3.125.223.134:17483 | 0.tcp.eu.ngrok.io | — | US | malicious |
540 | dllhost.exe | 93.184.221.240:80 | www.download.windowsupdate.com | MCI Communications Services, Inc. d/b/a Verizon Business | US | whitelisted |
Domain | IP | Reputation |
---|---|---|
0.tcp.eu.ngrok.io |
| malicious |
www.download.windowsupdate.com |
| whitelisted |
PID | Process | Class | Message |
---|---|---|---|
— | — | Potential Corporate Privacy Violation | ET POLICY DNS Query to a *.ngrok domain (ngrok.io) |
1372 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
1372 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
1372 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
1372 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
— | — | Potential Corporate Privacy Violation | ET POLICY DNS Query to a *.ngrok domain (ngrok.io) |
540 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
540 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
540 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |
540 | dllhost.exe | A Network Trojan was detected | MALWARE [PTsecurity] AsyncRAT |