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| File name: | Build.exe |
| Full analysis: | https://app.any.run/tasks/64aae01a-f3de-45dc-90ec-9696790a2a5b |
| 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, 12:24:54 |
| 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: | 35CD99A80147722F8826156F30511AC4 |
| SHA1: | 523560850981FDC4563DB5743CE626DC41813241 |
| SHA256: | 9B77B1B47AB4AA760913EB0965AEF5D3B3E1E2C0D2878B2235DB75CBE1502998 |
| SSDEEP: | 768:BmXAOvnjDdF9cRpcnuh7J4NYMY+PCj2pN5v7kut9zJN:sXAOvnjDHWRWu1+vxPCjE7XtJ |
MALICIOUS
Drops executable file immediately after starts
- Build.exe (PID: 1620)
- Microsoft Services.exe (PID: 3644)
Writes to a start menu file
- Microsoft Services.exe (PID: 3644)
Connects to CnC server
- Microsoft Services.exe (PID: 3644)
NJRAT was detected
- Microsoft Services.exe (PID: 3644)
Changes the autorun value in the registry
- Microsoft Services.exe (PID: 3644)
SUSPICIOUS
Checks supported languages
- Build.exe (PID: 1620)
- Microsoft Services.exe (PID: 3644)
Starts itself from another location
- Build.exe (PID: 1620)
Reads the computer name
- Build.exe (PID: 1620)
- Microsoft Services.exe (PID: 3644)
Drops a file with a compile date too recent
- Build.exe (PID: 1620)
- Microsoft Services.exe (PID: 3644)
Executable content was dropped or overwritten
- Build.exe (PID: 1620)
- Microsoft Services.exe (PID: 3644)
Uses NETSH.EXE for network configuration
- Microsoft Services.exe (PID: 3644)
Reads Environment values
- netsh.exe (PID: 3876)
- Microsoft Services.exe (PID: 3644)
Creates files in the user directory
- Microsoft Services.exe (PID: 3644)
INFO
Reads the computer name
- netsh.exe (PID: 3876)
Checks supported languages
- netsh.exe (PID: 3876)
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.) (62) |
|---|---|---|
| .exe | | | Win64 Executable (generic) (23.3) |
| .dll | | | Win32 Dynamic Link Library (generic) (5.5) |
| .exe | | | Win32 Executable (generic) (3.8) |
| .exe | | | Win16/32 Executable Delphi generic (1.7) |
EXIF
EXE
| Subsystem: | Windows GUI |
|---|---|
| SubsystemVersion: | 4 |
| ImageVersion: | - |
| OSVersion: | 4 |
| EntryPoint: | 0x74ae |
| UninitializedDataSize: | - |
| InitializedDataSize: | 168448 |
| CodeSize: | 22016 |
| LinkerVersion: | 8 |
| PEType: | PE32 |
| TimeStamp: | 2022:06:27 14:24:38+02:00 |
| MachineType: | Intel 386 or later, and compatibles |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 27-Jun-2022 12:24:38 |
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: | 27-Jun-2022 12:24:38 |
| 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 | 0x000054B4 | 0x00005600 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.58163 |
.rsrc | 0x00008000 | 0x00028E70 | 0x00029000 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 1.48575 |
.reloc | 0x00032000 | 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 | 4.96801 | 487 | Latin 1 / Western European | UNKNOWN | RT_MANIFEST |
50 | 2.61887 | 132 | Latin 1 / Western European | UNKNOWN | RT_GROUP_ICON |
51 | 0.826623 | 67624 | Latin 1 / Western European | UNKNOWN | RT_ICON |
52 | 1.10566 | 38056 | Latin 1 / Western European | UNKNOWN | RT_ICON |
53 | 1.16812 | 21640 | Latin 1 / Western European | UNKNOWN | RT_ICON |
54 | 1.05721 | 16936 | Latin 1 / Western European | UNKNOWN | RT_ICON |
55 | 1.32717 | 9640 | Latin 1 / Western European | UNKNOWN | RT_ICON |
56 | 1.39859 | 4264 | Latin 1 / Western European | UNKNOWN | RT_ICON |
57 | 1.68541 | 2440 | Latin 1 / Western European | UNKNOWN | RT_ICON |
58 | 1.77467 | 1128 | Latin 1 / Western European | UNKNOWN | RT_ICON |
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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1620 | "C:\Users\admin\AppData\Local\Temp\Build.exe" | C:\Users\admin\AppData\Local\Temp\Build.exe | Explorer.EXE | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3644 | "C:\Users\admin\AppData\Local\Temp\Microsoft Services.exe" | C:\Users\admin\AppData\Local\Temp\Microsoft Services.exe | Build.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Modules
| |||||||||||||||
| 3876 | netsh firewall add allowedprogram "C:\Users\admin\AppData\Local\Temp\Microsoft Services.exe" "Microsoft Services.exe" ENABLE | C:\Windows\system32\netsh.exe | — | Microsoft Services.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) Modules
| |||||||||||||||
Total events
2 237
Read events
1 924
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 | |
|---|---|---|---|---|
| 1620 | Build.exe | C:\Users\admin\AppData\Local\Temp\Microsoft Services.exe | executable | |
MD5:35CD99A80147722F8826156F30511AC4 | SHA256:9B77B1B47AB4AA760913EB0965AEF5D3B3E1E2C0D2878B2235DB75CBE1502998 | |||
| 3644 | Microsoft Services.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbd9bd35b2160b8b4cfcefee14f55a50.exe | executable | |
MD5:35CD99A80147722F8826156F30511AC4 | SHA256:9B77B1B47AB4AA760913EB0965AEF5D3B3E1E2C0D2878B2235DB75CBE1502998 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
2
DNS requests
0
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 |
|---|---|---|---|---|---|---|
3644 | Microsoft Services.exe | 194.40.243.240:23356 | — | — | — | malicious |
DNS requests
Threats
PID | Process | Class | Message |
|---|---|---|---|
3644 | Microsoft Services.exe | A Network Trojan was detected | ET TROJAN Generic njRAT/Bladabindi CnC Activity (ll) |
3644 | Microsoft Services.exe | A Network Trojan was detected | ET TROJAN njrat ver 0.7d Malware CnC Callback (Remote Desktop) |
3 ETPRO signatures available at the full report