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| File name: | SilverFox.7z |
| Full analysis: | https://app.any.run/tasks/725e2f75-76c1-455e-9fda-731732010343 |
| Verdict: | Malicious activity |
| Threats: | ValleyRAT is a classic remote access trojan first documented in 2023, targeting mainly Windows systems. It is used by threat actors to gain persistent access to infected devices, steal data, and control compromised machines. ValleyRAT is notable for its relatively advanced evasion techniques and its connections to a prominent Chinese APT group. |
| Analysis date: | December 26, 2024, 14:53:45 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-7z-compressed |
| File info: | 7-zip archive data, version 0.4 |
| MD5: | 54ACF97E27719432C0CDD6714D468AB7 |
| SHA1: | 470A06CC4491311EF43E0D979BBA300AD4DF5F72 |
| SHA256: | 4D08AF0A23E230672FAE7CAB550F7F7D512CC02D4EE5DF04F7EB8E997F90A5A4 |
| SSDEEP: | 98304:Rjuu3XoayYXkVZFvOYLXXTsnelbeDpsHUz2tFCqgWOQA56ffNRkYTZT7Zjcdh3Li:ryhQxEsAhk4fJ |
MALICIOUS
VALLEYRAT has been found (auto)
- WinRAR.exe (PID: 6056)
Adds path to the Windows Defender exclusion list
- 安装助手1.0.2.tmp (PID: 2612)
SUSPICIOUS
Executable content was dropped or overwritten
- 安装助手1.0.2.exe (PID: 4932)
- 安装助手1.0.2.exe (PID: 3288)
- 安装助手1.0.2.tmp (PID: 2612)
- 安装助手1.0.2.exe (PID: 5876)
- 安装助手1.0.2.tmp (PID: 6268)
Reads the Windows owner or organization settings
- 安装助手1.0.2.tmp (PID: 2612)
Process drops legitimate windows executable
- 安装助手1.0.2.tmp (PID: 2612)
- 安装助手1.0.2.tmp (PID: 6268)
Script adds exclusion path to Windows Defender
- 安装助手1.0.2.tmp (PID: 2612)
Starts POWERSHELL.EXE for commands execution
- 安装助手1.0.2.tmp (PID: 2612)
Reads security settings of Internet Explorer
- 安装助手1.0.2.tmp (PID: 2612)
INFO
Executable content was dropped or overwritten
- WinRAR.exe (PID: 6056)
Checks supported languages
- 安装助手1.0.2.exe (PID: 4932)
- 安装助手1.0.2.tmp (PID: 5732)
- 安装助手1.0.2.tmp (PID: 2612)
- 安装助手1.0.2.tmp (PID: 6268)
The process uses the downloaded file
- WinRAR.exe (PID: 6056)
- 安装助手1.0.2.tmp (PID: 2612)
Create files in a temporary directory
- 安装助手1.0.2.exe (PID: 3288)
- 安装助手1.0.2.tmp (PID: 2612)
- 安装助手1.0.2.exe (PID: 5876)
- 安装助手1.0.2.tmp (PID: 6268)
Reads the computer name
- 安装助手1.0.2.tmp (PID: 2612)
- 安装助手1.0.2.tmp (PID: 6268)
Checks if a key exists in the options dictionary (POWERSHELL)
- powershell.exe (PID: 624)
Script raised an exception (POWERSHELL)
- powershell.exe (PID: 624)
Creates files in the program directory
- 安装助手1.0.2.tmp (PID: 6268)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .7z | | | 7-Zip compressed archive (v0.4) (57.1) |
|---|---|---|
| .7z | | | 7-Zip compressed archive (gen) (42.8) |
EXIF
ZIP
| FileVersion: | 7z v0.04 |
|---|
Total processes
138
Monitored processes
9
Malicious processes
3
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 624 | "powershell.exe" -Command "Add-MpPreference -ExclusionPath 'C:\'" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | — | 安装助手1.0.2.tmp | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows PowerShell Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2612 | "C:\Users\admin\AppData\Local\Temp\is-PQQOT.tmp\安装助手1.0.2.tmp" /SL5="$702EC,4753116,845824,C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" /SPAWNWND=$4027A /NOTIFYWND=$7028C | C:\Users\admin\AppData\Local\Temp\is-PQQOT.tmp\安装助手1.0.2.tmp | 安装助手1.0.2.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Setup/Uninstall Exit code: 1 Version: 51.1052.0.0 Modules
| |||||||||||||||
| 2672 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | powershell.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 3288 | "C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" /SPAWNWND=$4027A /NOTIFYWND=$7028C | C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe | 安装助手1.0.2.tmp | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: SSRClient.exe Exit code: 1 Version: 1.3.32.1 Modules
| |||||||||||||||
| 4932 | "C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" | C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe | WinRAR.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: SSRClient.exe Exit code: 1 Version: 1.3.32.1 Modules
| |||||||||||||||
| 5732 | "C:\Users\admin\AppData\Local\Temp\is-AUFJ9.tmp\安装助手1.0.2.tmp" /SL5="$7028C,4753116,845824,C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" | C:\Users\admin\AppData\Local\Temp\is-AUFJ9.tmp\安装助手1.0.2.tmp | — | 安装助手1.0.2.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Setup/Uninstall Exit code: 1 Version: 51.1052.0.0 Modules
| |||||||||||||||
| 5876 | "C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" /VERYSILENT | C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe | 安装助手1.0.2.tmp | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: SSRClient.exe Exit code: 0 Version: 1.3.32.1 Modules
| |||||||||||||||
| 6056 | "C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\Downloads\SilverFox.7z | C:\Program Files\WinRAR\WinRAR.exe | explorer.exe | ||||||||||||
User: admin Company: Alexander Roshal Integrity Level: MEDIUM Description: WinRAR archiver Version: 5.91.0 Modules
| |||||||||||||||
| 6268 | "C:\Users\admin\AppData\Local\Temp\is-SJESA.tmp\安装助手1.0.2.tmp" /SL5="$8028C,4753116,845824,C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe" /VERYSILENT | C:\Users\admin\AppData\Local\Temp\is-SJESA.tmp\安装助手1.0.2.tmp | 安装助手1.0.2.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Setup/Uninstall Exit code: 0 Version: 51.1052.0.0 Modules
| |||||||||||||||
Total events
7 496
Read events
7 487
Write events
9
Delete events
0
Modification events
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | name |
Value: 120 | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | size |
Value: 80 | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | type |
Value: 120 | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | mtime |
Value: 100 | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\Interface |
| Operation: | write | Name: | ShowPassword |
Value: 0 | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 3 |
Value: C:\Users\admin\Desktop\preferences.zip | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 2 |
Value: C:\Users\admin\Desktop\chromium_ext.zip | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 1 |
Value: C:\Users\admin\Desktop\omni_23_10_2024_.zip | |||
| (PID) Process: | (6056) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 0 |
Value: C:\Users\admin\Downloads\SilverFox.7z | |||
Executable files
11
Suspicious files
3
Text files
2
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 3288 | 安装助手1.0.2.exe | C:\Users\admin\AppData\Local\Temp\is-PQQOT.tmp\安装助手1.0.2.tmp | executable | |
MD5:9902FA6D39184B87AED7D94A037912D8 | SHA256:43D9F1FA3BDA81C618CC23FBB4E9D8551305AF0090A3D452C4070F938F6BCFAC | |||
| 5876 | 安装助手1.0.2.exe | C:\Users\admin\AppData\Local\Temp\is-SJESA.tmp\安装助手1.0.2.tmp | executable | |
MD5:9902FA6D39184B87AED7D94A037912D8 | SHA256:43D9F1FA3BDA81C618CC23FBB4E9D8551305AF0090A3D452C4070F938F6BCFAC | |||
| 6056 | WinRAR.exe | C:\Users\admin\AppData\Local\Temp\Rar$EXb6056.19294\安装助手1.0.2.exe | executable | |
MD5:8D24FF51C87BC901CB4C88CB885DC15A | SHA256:52AE54A6103BE491559249ED1ED982B69B06948849A880DB142EB37FF0484A3B | |||
| 4932 | 安装助手1.0.2.exe | C:\Users\admin\AppData\Local\Temp\is-AUFJ9.tmp\安装助手1.0.2.tmp | executable | |
MD5:9902FA6D39184B87AED7D94A037912D8 | SHA256:43D9F1FA3BDA81C618CC23FBB4E9D8551305AF0090A3D452C4070F938F6BCFAC | |||
| 2612 | 安装助手1.0.2.tmp | C:\Users\admin\AppData\Local\Temp\is-30K7C.tmp\update.vac | executable | |
MD5:1D1464C73252978A58AC925ECE57F0FB | SHA256:05184064FB017025E0704D75D199BAE02EBBD30AE4D76FB237DF9596CE6450AA | |||
| 624 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_c0jponte.kly.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 624 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_qqrwducx.x1y.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 6268 | 安装助手1.0.2.tmp | C:\Users\admin\AppData\Local\Temp\is-25QRA.tmp\_isetup\_setup64.tmp | executable | |
MD5:E4211D6D009757C078A9FAC7FF4F03D4 | SHA256:388A796580234EFC95F3B1C70AD4CB44BFDDC7BA0F9203BF4902B9929B136F95 | |||
| 6268 | 安装助手1.0.2.tmp | C:\Users\admin\AppData\Local\Temp\is-25QRA.tmp\update.vac | executable | |
MD5:1D1464C73252978A58AC925ECE57F0FB | SHA256:05184064FB017025E0704D75D199BAE02EBBD30AE4D76FB237DF9596CE6450AA | |||
| 624 | powershell.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive | binary | |
MD5:F395A95DE9129C7E2CDC3001D7FE3256 | SHA256:8512F43DDBA1416BFAFD2F59724CFD81554D32A02B11BC751205450BE9D77EE2 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
30
DNS requests
16
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
4712 | MoUsoCoreWorker.exe | GET | 200 | 23.48.23.167:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | DE | binary | 1.01 Kb | whitelisted |
1176 | svchost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | US | binary | 471 b | whitelisted |
7076 | SIHClient.exe | GET | 200 | 23.37.237.227:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | DE | binary | 418 b | whitelisted |
7076 | SIHClient.exe | GET | 200 | 23.37.237.227:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | DE | binary | 408 b | whitelisted |
6768 | backgroundTaskHost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | US | binary | 471 b | whitelisted |
4712 | MoUsoCoreWorker.exe | GET | 200 | 23.38.73.129:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | DE | binary | 973 b | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
— | — | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4712 | MoUsoCoreWorker.exe | 23.48.23.167:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
4712 | MoUsoCoreWorker.exe | 23.38.73.129:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
2736 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5064 | SearchApp.exe | 2.21.110.146:443 | — | AKAMAI-AS | DE | unknown |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
1480 | RUXIMICS.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3976 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
1176 | svchost.exe | 40.126.32.76:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
google.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
settings-win.data.microsoft.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
go.microsoft.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
arc.msn.com |
| whitelisted |