File name: | AsyncClient.exe |
Full analysis: | https://app.any.run/tasks/bdbf2b5e-dd3b-42c4-bf56-244455148348 |
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: | January 15, 2022, 02:14:00 |
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: | 3F4E6AFB3B29986554D4F9C210A9FF49 |
SHA1: | 58455E46AC4E6B21CA7D83EA6110D6F4D66E0D04 |
SHA256: | A5E0384D26B7B9BC63DAB77558175E8BBBF89D14BDE3819770A63857A339BF62 |
SSDEEP: | 768:Wu1a21T3EiJfWUzuydmo2qzs+ICmLl4qPI+uldB570bA6lXMQH5l7qSgJbC1E4B8:Wu1a21T3xN2/GT+uIbA6lXF/7YJCdYxX |
.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: | 2560 |
UninitializedDataSize: | - |
EntryPoint: | 0xd08e |
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 | 0x0000B094 | 0x0000B200 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.62076 |
.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 |
---|---|---|---|---|
2216 | "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 | ||||
1160 | C:\Windows\system32\cmd.exe /c ""C:\Users\admin\AppData\Local\Temp\tmp3BBE.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) | ||||
3984 | 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) | ||||
2740 | "C:\Users\admin\AppData\Roaming\Update.exe" | C:\Users\admin\AppData\Roaming\Update.exe | cmd.exe | |
User: admin Integrity Level: MEDIUM Version: 1.0.0.0 |
(PID) Process: | (2216) AsyncClient.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\16C\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US | |||
(PID) Process: | (2216) AsyncClient.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
Operation: | write | Name: | Update |
Value: "C:\Users\admin\AppData\Roaming\Update.exe" | |||
(PID) Process: | (2740) Update.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\16C\52C64B7E |
Operation: | write | Name: | LanguageList |
Value: en-US |
PID | Process | Filename | Type | |
---|---|---|---|---|
2216 | AsyncClient.exe | C:\Users\admin\AppData\Local\Temp\tmp3BBE.tmp.bat | text | |
MD5:B7A4F3F621962DF8AC0FF06167D836FD | SHA256:7C53F3FCFD988E63536B63AD5F0C74EDD77A68C69404CC1DD6CF93CB21BCD9CB | |||
2740 | Update.exe | C:\Users\admin\AppData\Local\Temp\Tar5CC4.tmp | cat | |
MD5:D99661D0893A52A0700B8AE68457351A | SHA256:BDD5111162A6FA25682E18FA74E37E676D49CAFCB5B7207E98E5256D1EF0D003 | |||
2740 | Update.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506 | binary | |
MD5:0CDBDC5E0B263E281F005FD0DB0639CE | SHA256:23BEC99866427879EEBA0175EB7341429C5AF84BA39FB35F32FD016717FCCA1E | |||
2216 | AsyncClient.exe | C:\Users\admin\AppData\Roaming\Update.exe | executable | |
MD5:3F4E6AFB3B29986554D4F9C210A9FF49 | SHA256:A5E0384D26B7B9BC63DAB77558175E8BBBF89D14BDE3819770A63857A339BF62 | |||
2740 | Update.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506 | compressed | |
MD5:ACAEDA60C79C6BCAC925EEB3653F45E0 | SHA256:6B0CECCF0103AFD89844761417C1D23ACC41F8AEBF3B7230765209B61EEE5658 | |||
2740 | Update.exe | C:\Users\admin\AppData\Local\Temp\Cab5CC3.tmp | compressed | |
MD5:ACAEDA60C79C6BCAC925EEB3653F45E0 | SHA256:6B0CECCF0103AFD89844761417C1D23ACC41F8AEBF3B7230765209B61EEE5658 |
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
---|---|---|---|---|---|---|---|---|---|
2740 | Update.exe | GET | 200 | 67.26.75.254:80 | http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?756723c48013f99a | US | compressed | 59.9 Kb | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
---|---|---|---|---|---|---|
2740 | Update.exe | 67.26.75.254:80 | ctldl.windowsupdate.com | Level 3 Communications, Inc. | US | suspicious |
2740 | Update.exe | 198.54.133.72:54893 | momo5050.ddns.net | tzulo, inc. | US | malicious |
Domain | IP | Reputation |
---|---|---|
momo5050.ddns.net |
| malicious |
ctldl.windowsupdate.com |
| whitelisted |
PID | Process | Class | Message |
---|---|---|---|
— | — | Potentially Bad Traffic | ET POLICY DNS Query to DynDNS Domain *.ddns .net |
2740 | Update.exe | A Network Trojan was detected | ET TROJAN Observed Malicious SSL Cert (AsyncRAT Server) |