| File name: | e59f8c9c1aff8910a4936a24fb18fe61 |
| Full analysis: | https://app.any.run/tasks/7dfaedc6-fbda-4a11-a925-ae9b7695f5c1 |
| Verdict: | Malicious activity |
| Threats: | First identified in March 2021, PureCrypter is a .NET-based loader that employs obfuscation techniques, such as SmartAssembly, to evade detection. It has been used to distribute malware families including AgentTesla, RedLine Stealer, and SnakeKeylogger. The malware is typically delivered through phishing campaigns and malicious downloads, often masquerading as legitimate files with extensions like .mp4 or .pdf. PureCrypter utilizes encryption and compression to conceal its payloads and can inject malicious code into legitimate processes to maintain persistence on the infected system. |
| Analysis date: | October 23, 2024, 08:22:32 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32+ executable (GUI) x86-64 Mono/.Net assembly, for MS Windows |
| MD5: | E59F8C9C1AFF8910A4936A24FB18FE61 |
| SHA1: | 2BE32D743E0F8862DA396D628ED0372E202E39A6 |
| SHA256: | 1E8124EE85E5548A138ACA54512791DE6F0CC2DA916C91896CBF63BC73E6B4EF |
| SSDEEP: | 98304:/i4KcRsAapDznDxgdHQgjj34nW/pm4JLeykwFjmrnUIxcQrbwRNidsnOTBWOzxHn:/ |
MALICIOUS
PURECRYPTER has been detected (YARA)
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
SUSPICIOUS
Executable content was dropped or overwritten
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
INFO
Reads the computer name
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
Reads the machine GUID from the registry
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
Checks supported languages
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
Manual execution by a user
- InstallUtil.exe (PID: 5788)
.NET Reactor protector has been detected
- e59f8c9c1aff8910a4936a24fb18fe61.exe (PID: 6044)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
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: | 2024:10:19 09:28:48+00:00 |
| ImageFileCharacteristics: | Executable, No line numbers, No symbols, Large address aware |
| PEType: | PE32+ |
| LinkerVersion: | 8 |
| CodeSize: | 2101248 |
| InitializedDataSize: | 1536 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x0000 |
| 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: | Tckdoh |
| FileVersion: | 1.0.0.0 |
| InternalName: | Tckdoh.exe |
| LegalCopyright: | Copyright © 2010 |
| LegalTrademarks: | - |
| OriginalFileName: | Tckdoh.exe |
| ProductName: | Tckdoh |
| ProductVersion: | 1.0.0.0 |
| AssemblyVersion: | 1.0.0.0 |
Total processes
124
Monitored processes
2
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5788 | "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe" | C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe | — | explorer.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
| |||||||||||||||
| 6044 | "C:\Users\admin\Desktop\e59f8c9c1aff8910a4936a24fb18fe61.exe" | C:\Users\admin\Desktop\e59f8c9c1aff8910a4936a24fb18fe61.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Tckdoh Exit code: 4294967295 Version: 1.0.0.0 Modules
| |||||||||||||||
Total events
458
Read events
458
Write events
0
Delete events
0
Modification events
Executable files
1
Suspicious files
0
Text files
1
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 6044 | e59f8c9c1aff8910a4936a24fb18fe61.exe | C:\Users\admin\AppData\Local\cvchost.exe | executable | |
MD5:E59F8C9C1AFF8910A4936A24FB18FE61 | SHA256:1E8124EE85E5548A138ACA54512791DE6F0CC2DA916C91896CBF63BC73E6B4EF | |||
| 6044 | e59f8c9c1aff8910a4936a24fb18fe61.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cvchost.vbs | text | |
MD5:388B9D6488E0D6999A6F9D1DEC8DD729 | SHA256:7404B936F50F23AD5D699072FD142DD23788F7CC7DDB164AC4CC67E8CDF0BA5B | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
27
DNS requests
7
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
3952 | RUXIMICS.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
6944 | svchost.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
5488 | MoUsoCoreWorker.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
3952 | RUXIMICS.exe | GET | 200 | 23.53.40.178:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
6944 | svchost.exe | GET | 200 | 23.53.40.178:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
5488 | MoUsoCoreWorker.exe | GET | 200 | 23.53.40.178:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | 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 | System | 192.168.100.255:137 | — | — | — | whitelisted |
6944 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3952 | RUXIMICS.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5488 | MoUsoCoreWorker.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 104.126.37.178:443 | www.bing.com | Akamai International B.V. | DE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
6944 | svchost.exe | 23.53.40.178:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
3952 | RUXIMICS.exe | 23.53.40.178:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
5488 | MoUsoCoreWorker.exe | 23.53.40.178:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
3952 | RUXIMICS.exe | 184.30.21.171:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
www.bing.com |
| whitelisted |
google.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
self.events.data.microsoft.com |
| whitelisted |