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:
arechclient2
backdoor
xor-url
generic
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

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.
  • MALICIOUS

    • Connects to the CnC server

      • InstallUtil.exe (PID: 5732)
    • ARECHCLIENT2 has been detected (SURICATA)

      • InstallUtil.exe (PID: 5732)
    • XORed URL has been found (YARA)

      • InstallUtil.exe (PID: 5732)
  • SUSPICIOUS

    • Contacting a server suspected of hosting an CnC

      • InstallUtil.exe (PID: 5732)
    • Connects to unusual port

      • InstallUtil.exe (PID: 5732)
  • INFO

    • Manual execution by a user

      • cmd.exe (PID: 5084)
    • Executable content was dropped or overwritten

      • WinRAR.exe (PID: 5508)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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
No Malware configuration.

TRiD

.zip | ZIP compressed archive (100)

EXIF

ZIP

ZipRequiredVersion: 20
ZipBitFlag: -
ZipCompression: Deflated
ZipModifyDate: 2024:10:02 09:44:22
ZipCRC: 0x879b4719
ZipCompressedSize: 475045
ZipUncompressedSize: 947288
ZipFileName: AutoIt3.exe
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
134
Monitored processes
6
Malicious processes
3
Suspicious processes
0

Behavior graph

Click at the process to see the details
start winrar.exe cmd.exe no specs conhost.exe no specs autoit3.exe no specs installutil.exe no specs #XOR-URL installutil.exe

Process information

PID
CMD
Path
Indicators
Parent process
832\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1C:\Windows\System32\conhost.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Console Window Host
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\conhost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll
1120C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeAutoIt3.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
Images
c:\windows\microsoft.net\framework\v4.0.30319\installutil.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
5084"C:\WINDOWS\system32\cmd.exe" C:\Windows\System32\cmd.exeexplorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\cmd.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\winbrand.dll
c:\windows\system32\wldp.dll
5220AutoIt3.exe dchhbfa.a3xC:\dfadakh\AutoIt3.execmd.exe
User:
admin
Company:
AutoIt Team
Integrity Level:
MEDIUM
Description:
AutoIt v3 Script
Exit code:
0
Version:
3, 3, 16, 1
Modules
Images
c:\dfadakh\autoit3.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\psapi.dll
c:\windows\syswow64\user32.dll
5508"C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\AppData\Local\Temp\tmp.zipC:\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
Images
c:\program files\winrar\winrar.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\win32u.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\gdi32full.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
5732C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeC:\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
Images
c:\windows\microsoft.net\framework\v4.0.30319\installutil.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\advapi32.dll
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
Total events
4 157
Read events
4 126
Write events
31
Delete events
0

Modification events

(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:writeName:1
Value:
C:\Users\admin\Desktop\GoogleChromeEnterpriseBundle64.zip
(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:writeName:0
Value:
C:\Users\admin\AppData\Local\Temp\tmp.zip
(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:writeName:name
Value:
120
(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:writeName:size
Value:
80
(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:writeName:type
Value:
120
(PID) Process:(5508) WinRAR.exeKey:HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:writeName:mtime
Value:
100
(PID) Process:(5220) AutoIt3.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
Operation:writeName:dchhbfa
Value:
"C:\dfadakh\AutoIt3.exe" C:\dfadakh\dchhbfa.a3x
(PID) Process:(5732) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(5732) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableAutoFileTracing
Value:
0
(PID) Process:(5732) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableConsoleTracing
Value:
0
Executable files
1
Suspicious files
10
Text files
4
Unknown types
1

Dropped files

PID
Process
Filename
Type
5732InstallUtil.exeC:\Users\admin\AppData\Local\nimda\llg\content.jstext
MD5:FEFC21602C9CB58C46919F0E9A48B57A
SHA256:F48069A8DC9737C9437AB0D02261747EA0A3063EE80A11372F70358C1CE6C606
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmpD510.tmpsqlite
MD5:06AD9E737639FDC745B3B65312857109
SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404
5732InstallUtil.exeC:\Users\admin\AppData\Local\nimda\llg\icon.pngimage
MD5:2C905A6E4A21A3FA14ADC1D99B7CBC03
SHA256:CC3631CED23F21AE095C1397770E685F12F6AD788C8FA2F15487835A77A380FB
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmpD511.tmpsqlite
MD5:06AD9E737639FDC745B3B65312857109
SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmpD50F.tmpsqlite
MD5:06AD9E737639FDC745B3B65312857109
SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmp4CE2.tmpsqlite
MD5:06AD9E737639FDC745B3B65312857109
SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmp4CC1.tmpbinary
MD5:06AD9E737639FDC745B3B65312857109
SHA256:C8925892CA8E213746633033AE95ACFB8DD9531BC376B82066E686AC6F40A404
5508WinRAR.exeC:\Users\admin\AppData\Local\Temp\Rar$DRa5508.31189\dchhbfa.a3xbinary
MD5:54A4AE586596C6C4F02F454E20DA2F15
SHA256:1231833EA78A813B8FCCDCF14D1A8D28EE7AA50ED5ECB4716D4B5328EE3FE8DD
5732InstallUtil.exeC:\Users\admin\AppData\Local\Temp\tmp4D21.tmpsqlite
MD5:46D9FCA6032297F8AEE08D73418312BA
SHA256:865856FA4C33C4AEE52E15FBB370B6611468FE947E76E197F0E50D0AD62CB1B4
5508WinRAR.exeC:\Users\admin\AppData\Local\Temp\Rar$DRa5508.31189\AutoIt3.exeexecutable
MD5:0ADB9B817F1DF7807576C2D7068DD931
SHA256:98E4F904F7DE1644E519D09371B8AFCBBF40FF3BD56D76CE4DF48479A4AB884B
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
9
TCP/UDP connections
73
DNS requests
24
Threats
3

HTTP requests

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
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

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

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 20.73.194.208
  • 4.231.128.59
whitelisted
www.microsoft.com
  • 88.221.169.152
  • 184.30.21.171
whitelisted
google.com
  • 142.250.185.142
whitelisted
login.live.com
  • 20.190.159.71
  • 20.190.159.23
  • 20.190.159.64
  • 40.126.31.67
  • 20.190.159.2
  • 20.190.159.75
  • 40.126.31.73
  • 20.190.159.4
whitelisted
ocsp.digicert.com
  • 192.229.221.95
whitelisted
client.wns.windows.com
  • 40.115.3.253
whitelisted
browser.pipe.aria.microsoft.com
  • 20.189.173.17
whitelisted
go.microsoft.com
  • 23.35.238.131
whitelisted
www.bing.com
  • 2.23.209.156
  • 2.23.209.143
  • 2.23.209.144
  • 2.23.209.149
  • 2.23.209.142
  • 2.23.209.154
  • 2.23.209.150
  • 2.23.209.158
  • 2.23.209.157
whitelisted
th.bing.com
  • 2.23.209.157
  • 2.23.209.156
  • 2.23.209.143
  • 2.23.209.144
  • 2.23.209.149
  • 2.23.209.142
  • 2.23.209.154
  • 2.23.209.150
  • 2.23.209.158
whitelisted

Threats

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)
No debug info