| File name: | tmp.zip |
| Full analysis: | https://app.any.run/tasks/5830aacd-6ee7-4b4e-8a35-5c20998791d7 |
| Verdict: | Malicious activity |
| Threats: | The Arechclient2 malware is a sophisticated .NET-based Remote Access Trojan (RAT) that collects sensitive information, such as browser credentials, from infected computers. It employs various stealth techniques, including Base64 encoding to obscure its code and the ability to pause activities to evade automated security tools. The malware also can adjust Windows Defender settings and uses code injection to manipulate legitimate processes. |
| Analysis date: | October 02, 2024, 12:17:30 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/zip |
| File info: | Zip archive data, at least v2.0 to extract, compression method=deflate |
| MD5: | 76AE0DB80E1B7907ECB1674F42625B8D |
| SHA1: | 2E5578D70BEC5969D6820A9B445E2AF0DA1A03CF |
| SHA256: | 5D54B99ED38527E7D79FB88D612DA2347CFA5E69A88F1B6516B80E40A16D8F1C |
| SSDEEP: | 49152:xwo1WwDXzhhShSE9rzuXxxG0ai3aa2CYhIMXKyUId15IiIkPuTIYJN3LYsT4/ywz:CoAwT8SEH0Xqa2CIIvociSI83LYA4/ae |
| .zip | | | ZIP compressed archive (100) |
|---|
| ZipRequiredVersion: | 20 |
|---|---|
| ZipBitFlag: | - |
| ZipCompression: | Deflated |
| ZipModifyDate: | 2024:10:02 09:44:22 |
| ZipCRC: | 0x879b4719 |
| ZipCompressedSize: | 475045 |
| ZipUncompressedSize: | 947288 |
| ZipFileName: | AutoIt3.exe |
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 832 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 1120 | C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe | — | AutoIt3.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: .NET Framework installation utility Exit code: 0 Version: 4.8.9037.0 built by: NET481REL1 Modules
| |||||||||||||||
| 5084 | "C:\WINDOWS\system32\cmd.exe" | C:\Windows\System32\cmd.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5220 | AutoIt3.exe dchhbfa.a3x | C:\dfadakh\AutoIt3.exe | — | cmd.exe | |||||||||||
User: admin Company: AutoIt Team Integrity Level: MEDIUM Description: AutoIt v3 Script Exit code: 0 Version: 3, 3, 16, 1 Modules
| |||||||||||||||
| 5508 | "C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\AppData\Local\Temp\tmp.zip | C:\Program Files\WinRAR\WinRAR.exe | explorer.exe | ||||||||||||
User: admin Company: Alexander Roshal Integrity Level: MEDIUM Description: WinRAR archiver Exit code: 0 Version: 5.91.0 Modules
| |||||||||||||||
| 5732 | C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe | AutoIt3.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: .NET Framework installation utility Version: 4.8.9037.0 built by: NET481REL1 Modules
xor-url(PID) Process(5732) InstallUtil.exe Decrypted-URLs (3)http://dl.google.com/chrome/install/375.126/chrome_installer.exe https://github.com https://pastebin.com/raw/eB8bmiVA | |||||||||||||||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 1 |
Value: C:\Users\admin\Desktop\GoogleChromeEnterpriseBundle64.zip | |||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 0 |
Value: C:\Users\admin\AppData\Local\Temp\tmp.zip | |||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | name |
Value: 120 | |||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | size |
Value: 80 | |||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | type |
Value: 120 | |||
| (PID) Process: | (5508) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | mtime |
Value: 100 | |||
| (PID) Process: | (5220) AutoIt3.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce |
| Operation: | write | Name: | dchhbfa |
Value: "C:\dfadakh\AutoIt3.exe" C:\dfadakh\dchhbfa.a3x | |||
| (PID) Process: | (5732) InstallUtil.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32 |
| Operation: | write | Name: | EnableFileTracing |
Value: 0 | |||
| (PID) Process: | (5732) InstallUtil.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32 |
| Operation: | write | Name: | EnableAutoFileTracing |
Value: 0 | |||
| (PID) Process: | (5732) InstallUtil.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32 |
| Operation: | write | Name: | EnableConsoleTracing |
Value: 0 | |||
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\nimda\llg\content.js | text | |
MD5:FEFC21602C9CB58C46919F0E9A48B57A | SHA256:F48069A8DC9737C9437AB0D02261747EA0A3063EE80A11372F70358C1CE6C606 | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmpD510.tmp | sqlite | |
MD5:06AD9E737639FDC745B3B65312857109 | SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404 | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\nimda\llg\icon.png | image | |
MD5:2C905A6E4A21A3FA14ADC1D99B7CBC03 | SHA256:CC3631CED23F21AE095C1397770E685F12F6AD788C8FA2F15487835A77A380FB | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmpD511.tmp | sqlite | |
MD5:06AD9E737639FDC745B3B65312857109 | SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404 | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmpD50F.tmp | sqlite | |
MD5:06AD9E737639FDC745B3B65312857109 | SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404 | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmp4CE2.tmp | sqlite | |
MD5:06AD9E737639FDC745B3B65312857109 | SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404 | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmp4CC1.tmp | binary | |
MD5:06AD9E737639FDC745B3B65312857109 | SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404 | |||
| 5508 | WinRAR.exe | C:\Users\admin\AppData\Local\Temp\Rar$DRa5508.31189\dchhbfa.a3x | binary | |
MD5:54A4AE586596C6C4F02F454E20DA2F15 | SHA256:1231833EA78A813B8FCCDCF14D1A8D28EE7AA50ED5ECB4716D4B5328EE3FE8DD | |||
| 5732 | InstallUtil.exe | C:\Users\admin\AppData\Local\Temp\tmp4D21.tmp | sqlite | |
MD5:46D9FCA6032297F8AEE08D73418312BA | SHA256:865856FA4C33C4AEE52E15FBB370B6611468FE947E76E197F0E50D0AD62CB1B4 | |||
| 5508 | WinRAR.exe | C:\Users\admin\AppData\Local\Temp\Rar$DRa5508.31189\AutoIt3.exe | executable | |
MD5:0ADB9B817F1DF7807576C2D7068DD931 | SHA256:98E4F904F7DE1644E519D09371B8AFCBBF40FF3BD56D76CE4DF48479A4AB884B | |||
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
2120 | MoUsoCoreWorker.exe | GET | 200 | 88.221.169.152:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
5880 | svchost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
5336 | SearchApp.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D | unknown | — | — | whitelisted |
5336 | SearchApp.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D | unknown | — | — | whitelisted |
5336 | SearchApp.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | unknown | — | — | whitelisted |
2512 | 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 |
2512 | 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 |
1232 | backgroundTaskHost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D | unknown | — | — | whitelisted |
5732 | InstallUtil.exe | GET | 200 | 45.141.87.50:9000 | http://45.141.87.50:9000/wbinjget?q=EF680CC9EFE0A8BCEC05D07897760CE8 | unknown | — | — | unknown |
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
5388 | svchost.exe | 20.73.194.208:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
— | — | 20.73.194.208:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
2120 | MoUsoCoreWorker.exe | 88.221.169.152:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
3888 | svchost.exe | 239.255.255.250:1900 | — | — | — | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
5388 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5880 | svchost.exe | 20.190.159.71:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5880 | svchost.exe | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
3260 | svchost.exe | 40.115.3.253:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
browser.pipe.aria.microsoft.com |
| whitelisted |
go.microsoft.com |
| whitelisted |
www.bing.com |
| whitelisted |
th.bing.com |
| whitelisted |
PID | Process | Class | Message |
|---|---|---|---|
5732 | InstallUtil.exe | Malware Command and Control Activity Detected | ET MALWARE Arechclient2 Backdoor/SecTopRAT CnC Init |
5732 | InstallUtil.exe | A Network Trojan was detected | ET MALWARE Arechclient2 Backdoor/SecTopRAT Related Activity |
5732 | InstallUtil.exe | A Network Trojan was detected | ET MALWARE Arechclient2 Backdoor/SecTopRAT Related Activity M2 (GET) |