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| File name: | stub.exe |
| Full analysis: | https://app.any.run/tasks/16615655-1011-4981-9258-1f04f6e694bb |
| Verdict: | Malicious activity |
| Threats: | njRAT is a remote access trojan. It is one of the most widely accessible RATs on the market that features an abundance of educational information. Interested attackers can even find tutorials on YouTube. This allows it to become one of the most popular RATs in the world. |
| Analysis date: | June 27, 2022, 05:39:24 |
| 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: | 842FF4C570C2B7A0082277358EA5B6F7 |
| SHA1: | C66D73ED0F4A90EF65A1A4BC9348869AC27B5970 |
| SHA256: | B65B76D3CC55A5D7C631A532CD09DD2F335888DFA042C2C4637D4E327C6BD5C9 |
| SSDEEP: | 384:6iURxJTt/6ECAaWhy/DHNCZElrP104GaIucAJNl/R3GfCTC2PnkUPeZm1:6x5tCqxybsU71caJ1Z0EVsUPeZU |
MALICIOUS
Drops executable file immediately after starts
- stub.exe (PID: 2932)
- WinCleanup.exe (PID: 736)
Writes to a start menu file
- WinCleanup.exe (PID: 736)
Connects to CnC server
- WinCleanup.exe (PID: 736)
Changes the autorun value in the registry
- WinCleanup.exe (PID: 736)
NJRAT was detected
- WinCleanup.exe (PID: 736)
SUSPICIOUS
Checks supported languages
- stub.exe (PID: 2932)
- WinCleanup.exe (PID: 736)
Reads the computer name
- WinCleanup.exe (PID: 736)
- stub.exe (PID: 2932)
Creates files in the user directory
- stub.exe (PID: 2932)
- WinCleanup.exe (PID: 736)
Executable content was dropped or overwritten
- stub.exe (PID: 2932)
- WinCleanup.exe (PID: 736)
Drops a file with a compile date too recent
- stub.exe (PID: 2932)
- WinCleanup.exe (PID: 736)
Uses NETSH.EXE for network configuration
- WinCleanup.exe (PID: 736)
Starts itself from another location
- stub.exe (PID: 2932)
Reads Environment values
- netsh.exe (PID: 3904)
INFO
Checks supported languages
- netsh.exe (PID: 3904)
Reads the computer name
- netsh.exe (PID: 3904)
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: | 2085:03:26 16:45:28+02:00 |
| PEType: | PE32 |
| LinkerVersion: | 48 |
| CodeSize: | 23552 |
| InitializedDataSize: | 1536 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x7a0e |
| 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: | Client |
| FileVersion: | 1.0.0.0 |
| InternalName: | Client.exe |
| LegalCopyright: | Copyright © 2021 |
| LegalTrademarks: | - |
| OriginalFileName: | Client.exe |
| ProductName: | Client |
| ProductVersion: | 1.0.0.0 |
| AssemblyVersion: | 1.0.0.0 |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 18-Feb-1949 08:17:12 |
| Comments: | - |
| CompanyName: | - |
| FileDescription: | Client |
| FileVersion: | 1.0.0.0 |
| InternalName: | Client.exe |
| LegalCopyright: | Copyright © 2021 |
| LegalTrademarks: | - |
| OriginalFilename: | Client.exe |
| ProductName: | Client |
| 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: | 18-Feb-1949 08:17:12 |
| 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 | 0x00005A14 | 0x00005C00 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.62197 |
.rsrc | 0x00008000 | 0x00000364 | 0x00000400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 2.71186 |
.reloc | 0x0000A000 | 0x0000000C | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ | 0.0815394 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 3.20998 | 780 | UNKNOWN | UNKNOWN | RT_VERSION |
Imports
mscoree.dll |
Total processes
37
Monitored processes
3
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process |
|---|---|---|---|---|
| 2932 | "C:\Users\admin\AppData\Local\Temp\stub.exe" | C:\Users\admin\AppData\Local\Temp\stub.exe | Explorer.EXE | |
User: admin Integrity Level: MEDIUM Description: Client Exit code: 0 Version: 1.0.0.0 | ||||
| 736 | "C:\Users\admin\AppData\Roaming\WinCleanup.exe" | C:\Users\admin\AppData\Roaming\WinCleanup.exe | stub.exe | |
User: admin Integrity Level: MEDIUM Description: Client Version: 1.0.0.0 | ||||
| 3904 | netsh firewall add allowedprogram "C:\Users\admin\AppData\Roaming\WinCleanup.exe" "WinCleanup.exe" ENABLE | C:\Windows\system32\netsh.exe | — | WinCleanup.exe |
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Network Command Shell Exit code: 1 Version: 6.1.7600.16385 (win7_rtm.090713-1255) | ||||
Total events
1 841
Read events
1 548
Write events
0
Delete events
0
Modification events
Executable files
2
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 736 | WinCleanup.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\677eaef21befb8e5ce63dc323343c935.exe | executable | |
MD5:842FF4C570C2B7A0082277358EA5B6F7 | SHA256:B65B76D3CC55A5D7C631A532CD09DD2F335888DFA042C2C4637D4E327C6BD5C9 | |||
| 2932 | stub.exe | C:\Users\admin\AppData\Roaming\WinCleanup.exe | executable | |
MD5:842FF4C570C2B7A0082277358EA5B6F7 | SHA256:B65B76D3CC55A5D7C631A532CD09DD2F335888DFA042C2C4637D4E327C6BD5C9 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
1
DNS requests
1
Threats
0
HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
736 | WinCleanup.exe | 193.161.193.99:43055 | FiveBranch-43055.portmap.io | OOO Bitree Networks | RU | malicious |
DNS requests
Domain | IP | Reputation |
|---|---|---|
FiveBranch-43055.portmap.io |
| malicious |
Threats
PID | Process | Class | Message |
|---|---|---|---|
— | — | Potential Corporate Privacy Violation | ET POLICY DNS Query to a Reverse Proxy Service Observed |
736 | WinCleanup.exe | A Network Trojan was detected | ET TROJAN Generic njRAT/Bladabindi CnC Activity (ll) |
5 ETPRO signatures available at the full report