| download: | ok.exe |
| Full analysis: | https://app.any.run/tasks/0c94e04c-975d-4a67-be8d-dfd4b60ad86c |
| Verdict: | Malicious activity |
| Threats: | Orcus is a modular Remote Access Trojan with some unusual functions. This RAT enables attackers to create plugins using a custom development library and offers a robust core feature set that makes it one of the most dangerous malicious programs in its class. |
| Analysis date: | March 14, 2019, 19:42:39 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows |
| MD5: | E640C08F505C78B1887F5F4B091E1D64 |
| SHA1: | 8C1EC3EAFF6E846CE85682B7134751207D41F73D |
| SHA256: | 65F750AF58456CE7FF79936DBA02C53BB4802F0C9ACD81E7E37039A21ED06063 |
| SSDEEP: | 24576:YYE5yoCBCi2GynuYTzbCsUfGTJyw+kMjNl4lVmxh15NfCLU3IHcu7dVosjOjQiTG:tIXCslCr4lV0CLHjxmzn |
MALICIOUS
Uses Task Scheduler to run other applications
- ok.exe (PID: 3080)
Orcus was detected
- Regasm.exe (PID: 3052)
- Regasm.exe (PID: 1676)
Loads the Task Scheduler COM API
- schtasks.exe (PID: 3788)
SUSPICIOUS
Starts itself from another location
- ok.exe (PID: 3080)
Executable content was dropped or overwritten
- ok.exe (PID: 3080)
Connects to unusual port
- Regasm.exe (PID: 3052)
Creates files in the user directory
- ok.exe (PID: 3080)
INFO
Reads internet explorer settings
- iexplore.exe (PID: 2396)
Reads Internet Cache Settings
- iexplore.exe (PID: 2396)
Changes internet zones settings
- iexplore.exe (PID: 3592)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Generic CIL Executable (.NET, Mono, etc.) (45.1) |
|---|---|---|
| .exe | | | Win32 Executable MS Visual C++ (generic) (19.2) |
| .exe | | | Win64 Executable (generic) (17) |
| .scr | | | Windows screen saver (8) |
| .dll | | | Win32 Dynamic Link Library (generic) (4) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2019:03:14 20:41:48+01:00 |
| PEType: | PE32 |
| LinkerVersion: | 6 |
| CodeSize: | 1908736 |
| InitializedDataSize: | 2560 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x1d3f6e |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 0.0.0.0 |
| ProductVersionNumber: | 0.0.0.0 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | Neutral |
| CharacterSet: | Unicode |
| FileDescription: | |
| FileVersion: | 0.0.0.0 |
| InternalName: | ok.exe |
| LegalCopyright: | |
| OriginalFileName: | ok.exe |
| ProductVersion: | 0.0.0.0 |
| AssemblyVersion: | 0.0.0.0 |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 14-Mar-2019 19:41:48 |
| FileDescription: | - |
| FileVersion: | 0.0.0.0 |
| InternalName: | ok.exe |
| LegalCopyright: | - |
| OriginalFilename: | ok.exe |
| ProductVersion: | 0.0.0.0 |
| Assembly Version: | 0.0.0.0 |
DOS Header
| Magic number: | MZ |
|---|---|
| Bytes on last page of file: | 0x0090 |
| Pages in file: | 0x0003 |
| Relocations: | 0x0000 |
| Size of header: | 0x0004 |
| Min extra paragraphs: | 0x0000 |
| Max extra paragraphs: | 0xFFFF |
| Initial SS value: | 0x0000 |
| Initial SP value: | 0x00B8 |
| Checksum: | 0x0000 |
| Initial IP value: | 0x0000 |
| Initial CS value: | 0x0000 |
| Overlay number: | 0x0000 |
| OEM identifier: | 0x0000 |
| OEM information: | 0x0000 |
| Address of NE header: | 0x00000080 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 4 |
| Time date stamp: | 14-Mar-2019 19:41:48 |
| Pointer to Symbol Table: | 0x00000000 |
| Number of symbols: | 0 |
| Size of Optional Header: | 0x00E0 |
| Characteristics: |
|
Sections
Name | Virtual Address | Virtual Size | Raw Size | Charateristics | Entropy |
|---|---|---|---|---|---|
.text | 0x00002000 | 0x001D1F74 | 0x001D2000 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 6.25895 |
.sdata | 0x001D4000 | 0x000000B1 | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 2.17658 |
.rsrc | 0x001D6000 | 0x000004C0 | 0x00000600 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 3.68055 |
.reloc | 0x001D8000 | 0x0000000C | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ | 0.10191 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 5.00112 | 490 | UNKNOWN | UNKNOWN | RT_MANIFEST |
Imports
mscoree.dll |
Total processes
39
Monitored processes
8
Malicious processes
3
Suspicious processes
2
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1676 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Regasm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\Regasm.exe | MicrosoftSoundService.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft .NET Assembly Registration Utility Exit code: 0 Version: 4.6.1055.0 built by: NETFXREL2 Modules
| |||||||||||||||
| 2312 | C:\Users\admin\AppData\Roaming\MicrosoftSoundService.exe | C:\Users\admin\AppData\Roaming\MicrosoftSoundService.exe | — | taskeng.exe | |||||||||||
User: admin Integrity Level: MEDIUM Description: Exit code: 0 Version: 0.0.0.0 Modules
| |||||||||||||||
| 2396 | "C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:3592 CREDAT:71937 | C:\Program Files\Internet Explorer\iexplore.exe | — | iexplore.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Internet Explorer Exit code: 0 Version: 8.00.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 2892 | "C:\Users\admin\AppData\Roaming\MicrosoftSoundService.exe" | C:\Users\admin\AppData\Roaming\MicrosoftSoundService.exe | — | ok.exe | |||||||||||
User: admin Integrity Level: MEDIUM Description: Exit code: 0 Version: 0.0.0.0 Modules
| |||||||||||||||
| 3052 | "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Regasm.exe" | C:\Windows\Microsoft.NET\Framework\v4.0.30319\Regasm.exe | MicrosoftSoundService.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft .NET Assembly Registration Utility Exit code: 0 Version: 4.6.1055.0 built by: NETFXREL2 Modules
| |||||||||||||||
| 3080 | "C:\Users\admin\AppData\Local\Temp\ok.exe" | C:\Users\admin\AppData\Local\Temp\ok.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Exit code: 0 Version: 0.0.0.0 Modules
| |||||||||||||||
| 3592 | "C:\Program Files\Internet Explorer\iexplore.exe" | C:\Program Files\Internet Explorer\iexplore.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Internet Explorer Exit code: 0 Version: 8.00.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 3788 | schtasks /create /f /sc minute /mo 1 /tn "'ok'" /tr "'C:\Users\admin\AppData\Roaming\MicrosoftSoundService.exe'" | C:\Windows\system32\schtasks.exe | — | ok.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Manages scheduled tasks Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
Total events
736
Read events
692
Write events
44
Delete events
0
Modification events
| (PID) Process: | (3080) ok.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 0 | |||
| (PID) Process: | (3080) ok.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 1 | |||
| (PID) Process: | (3052) Regasm.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E |
| Operation: | write | Name: | LanguageList |
Value: en-US | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Operation: | write | Name: | CompatibilityFlags |
Value: 0 | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 0 | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 1 | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones |
| Operation: | write | Name: | SecuritySafe |
Value: 1 | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings |
| Operation: | write | Name: | ProxyEnable |
Value: 0 | |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections |
| Operation: | write | Name: | SavedLegacySettings |
Value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| |||
| (PID) Process: | (3592) iexplore.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Recovery\Active |
| Operation: | write | Name: | {7FB04DF9-4691-11E9-BEEC-5254004A04AF} |
Value: 0 | |||
Executable files
1
Suspicious files
4
Text files
1
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\CabECC2.tmp | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\TarECC3.tmp | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\CabECF3.tmp | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\TarECF4.tmp | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\CabEE0F.tmp | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\Local\Temp\TarEE10.tmp | — | |
MD5:— | SHA256:— | |||
| 3592 | iexplore.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\R9ZEWH8D\favicon[1].ico | — | |
MD5:— | SHA256:— | |||
| 3592 | iexplore.exe | C:\Users\admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico | — | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015 | compressed | |
MD5:— | SHA256:— | |||
| 3052 | Regasm.exe | C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015 | binary | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
2
TCP/UDP connections
3
DNS requests
3
Threats
5
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
3052 | Regasm.exe | GET | 200 | 2.16.186.56:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | unknown | compressed | 55.2 Kb | whitelisted |
3592 | iexplore.exe | GET | 200 | 13.107.21.200:80 | http://www.bing.com/favicon.ico | US | image | 237 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 |
|---|---|---|---|---|---|---|
3052 | Regasm.exe | 206.189.192.66:1337 | takethei.duckdns.org | — | US | malicious |
3052 | Regasm.exe | 2.16.186.56:80 | www.download.windowsupdate.com | Akamai International B.V. | — | whitelisted |
3592 | iexplore.exe | 13.107.21.200:80 | www.bing.com | Microsoft Corporation | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
takethei.duckdns.org |
| malicious |
www.download.windowsupdate.com |
| whitelisted |
www.bing.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
1064 | svchost.exe | Misc activity | ET INFO DYNAMIC_DNS Query to *.duckdns. Domain |
3052 | Regasm.exe | A Network Trojan was detected | MALWARE [PTsecurity] Malicious SSL Certificate (Orcus RAT) |
3052 | Regasm.exe | A Network Trojan was detected | MALWARE [PTsecurity] Malicious SSL Certificate (Orcus RAT) |
3052 | Regasm.exe | A Network Trojan was detected | MALWARE [PTsecurity] Malicious SSL connection (Orcus RAT) |
1 ETPRO signatures available at the full report