| File name: | bb.exe |
| Full analysis: | https://app.any.run/tasks/48416372-987f-4b7d-8ae1-0d7e786de081 |
| 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: | December 31, 2019, 09:39:44 |
| 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: | 99F2595491B1242AF5B99CFB131596E4 |
| SHA1: | DF79B28C41E1E6659AE9CC5947BCBE0C1FD9337F |
| SHA256: | 53B456ABFA851DD9F4ED33D5B99359A00235D1081BCF50837AF05F24A5562719 |
| SSDEEP: | 12288:Y8shHAVBuQBBed37dG1lFlWcYT70pxnnaaoawflBa2Ley+trZNrI0AilFEvxHvBv:p3s4MROxnFCay6rZlI0AilFEvxHi+IU |
MALICIOUS
Loads dropped or rewritten executable
- bb.exe (PID: 2620)
Starts Visual C# compiler
- bb.exe (PID: 2620)
ORCUS was detected
- bb.exe (PID: 2620)
SUSPICIOUS
Executable content was dropped or overwritten
- bb.exe (PID: 2620)
Creates files in the user directory
- bb.exe (PID: 2620)
INFO
No info indicators.
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.) (56.7) |
|---|---|---|
| .exe | | | Win64 Executable (generic) (21.3) |
| .scr | | | Windows screen saver (10.1) |
| .dll | | | Win32 Dynamic Link Library (generic) (5) |
| .exe | | | Win32 Executable (generic) (3.4) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2019:12:31 10:36:43+01:00 |
| PEType: | PE32 |
| LinkerVersion: | 8 |
| CodeSize: | 920064 |
| InitializedDataSize: | 4608 |
| UninitializedDataSize: | - |
| EntryPoint: | 0xe281e |
| 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: | - |
| FileVersion: | 1.0.0.0 |
| InternalName: | Orcus.exe |
| LegalCopyright: | - |
| LegalTrademarks: | - |
| OriginalFileName: | Orcus.exe |
| ProductName: | - |
| ProductVersion: | 1.0.0.0 |
| AssemblyVersion: | 1.0.0.0 |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 31-Dec-2019 09:36:43 |
| Comments: | - |
| CompanyName: | - |
| FileDescription: | - |
| FileVersion: | 1.0.0.0 |
| InternalName: | Orcus.exe |
| LegalCopyright: | - |
| LegalTrademarks: | - |
| OriginalFilename: | Orcus.exe |
| ProductName: | - |
| ProductVersion: | 1.0.0.0 |
| Assembly Version: | 1.0.0.0 |
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: | 3 |
| Time date stamp: | 31-Dec-2019 09:36:43 |
| 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 | 0x000E0824 | 0x000E0A00 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 7.14818 |
.rsrc | 0x000E4000 | 0x00001000 | 0x00001000 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 4.99491 |
.reloc | 0x000E6000 | 0x0000000C | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ | 0.0980042 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 4.99793 | 3128 | UNKNOWN | UNKNOWN | RT_MANIFEST |
Imports
mscoree.dll |
Total processes
38
Monitored processes
3
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1812 | "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\admin\AppData\Local\Temp\bvgqxd9t.cmdline" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe | — | bb.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Visual C# Command Line Compiler Exit code: 0 Version: 8.0.50727.4927 (NetFXspW7.050727-4900) Modules
| |||||||||||||||
| 2620 | "C:\Users\admin\AppData\Local\Temp\bb.exe" | C:\Users\admin\AppData\Local\Temp\bb.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Version: 1.0.0.0 Modules
| |||||||||||||||
| 3356 | C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\admin\AppData\Local\Temp\RESA98A.tmp" "c:\Users\admin\AppData\Local\Temp\CSCA989.tmp" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe | — | csc.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft® Resource File To COFF Object Conversion Utility Exit code: 0 Version: 8.00.50727.4940 (Win7SP1.050727-5400) Modules
| |||||||||||||||
Total events
73
Read events
57
Write events
16
Delete events
0
Modification events
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | LanguageList |
Value: en-US | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\p2pcollab.dll,-8042 |
Value: Peer to Peer Trust | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\qagentrt.dll,-10 |
Value: System Health Authentication | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\dnsapi.dll,-103 |
Value: Domain Name System (DNS) Server Trust | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\System32\fveui.dll,-843 |
Value: BitLocker Drive Encryption | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\System32\fveui.dll,-844 |
Value: BitLocker Data Recovery Agent | |||
| (PID) Process: | (2620) bb.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Direct3D\MostRecentApplication |
| Operation: | write | Name: | Name |
Value: bb.exe | |||
Executable files
6
Suspicious files
4
Text files
2
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 1812 | csc.exe | C:\Users\admin\AppData\Local\Temp\CSCA989.tmp | — | |
MD5:— | SHA256:— | |||
| 3356 | cvtres.exe | C:\Users\admin\AppData\Local\Temp\RESA98A.tmp | — | |
MD5:— | SHA256:— | |||
| 1812 | csc.exe | C:\Users\admin\AppData\Local\Temp\bvgqxd9t.dll | — | |
MD5:— | SHA256:— | |||
| 1812 | csc.exe | C:\Users\admin\AppData\Local\Temp\bvgqxd9t.out | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\CabAC77.tmp | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\TarAC78.tmp | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\CabAC88.tmp | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\TarAC89.tmp | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\CabAD46.tmp | — | |
MD5:— | SHA256:— | |||
| 2620 | bb.exe | C:\Users\admin\AppData\Local\Temp\TarAD47.tmp | — | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
1
TCP/UDP connections
2
DNS requests
1
Threats
4
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
2620 | bb.exe | GET | 200 | 205.185.216.42:80 | http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab | US | compressed | 57.4 Kb | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
2620 | bb.exe | 65.52.155.33:1337 | — | Microsoft Corporation | NL | malicious |
2620 | bb.exe | 205.185.216.42:80 | www.download.windowsupdate.com | Highwinds Network Group, Inc. | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
www.download.windowsupdate.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
2620 | bb.exe | A Network Trojan was detected | MALWARE [PTsecurity] Observed SSL Certificate (Orcus RAT) |
2620 | bb.exe | A Network Trojan was detected | MALWARE [PTsecurity] Observed SSL Certificate (Orcus RAT) |
2620 | bb.exe | A Network Trojan was detected | MALWARE [PTsecurity] Malicious SSL connection (Orcus RAT) |
1 ETPRO signatures available at the full report