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| File name: | Microsoft Excel 2019.exe |
| Full analysis: | https://app.any.run/tasks/30712910-2f1b-4a78-94b7-e17abb3e42b1 |
| 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: | January 24, 2022, 15:59:00 |
| 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: | 8430F179BB1C0C9614CCE252DA9BA9EE |
| SHA1: | C3E4835CD6B499E9E7BBEBD39E462D574172D1B3 |
| SHA256: | C7165FCF4DA9E920405B33C3FFB1BED74DE3390E60725D0F2B55B4F783EB698E |
| SSDEEP: | 768:14ngRO1VV0bGUeFkNrM+rMRa8NuiVtwbvDvFZt:Sn6O1V6aUey2+gRJNVo/NZ |
MALICIOUS
Connects to CnC server
- server.exe (PID: 2624)
NJRAT was detected
- server.exe (PID: 2624)
Changes the autorun value in the registry
- server.exe (PID: 2624)
SUSPICIOUS
Checks supported languages
- Microsoft Excel 2019.exe (PID: 2824)
- server.exe (PID: 2624)
Reads the computer name
- Microsoft Excel 2019.exe (PID: 2824)
- server.exe (PID: 2624)
Executable content was dropped or overwritten
- Microsoft Excel 2019.exe (PID: 2824)
Drops a file with a compile date too recent
- Microsoft Excel 2019.exe (PID: 2824)
Creates files in the user directory
- Microsoft Excel 2019.exe (PID: 2824)
Starts itself from another location
- Microsoft Excel 2019.exe (PID: 2824)
Uses NETSH.EXE for network configuration
- server.exe (PID: 2624)
Reads Environment values
- netsh.exe (PID: 1252)
- server.exe (PID: 2624)
Executed via COM
- DllHost.exe (PID: 1500)
INFO
Checks supported languages
- netsh.exe (PID: 1252)
- DllHost.exe (PID: 1500)
Reads the computer name
- DllHost.exe (PID: 1500)
- netsh.exe (PID: 1252)
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.) (63.1) |
|---|---|---|
| .exe | | | Win64 Executable (generic) (23.8) |
| .dll | | | Win32 Dynamic Link Library (generic) (5.6) |
| .exe | | | Win32 Executable (generic) (3.8) |
| .exe | | | Generic Win/DOS Executable (1.7) |
EXIF
EXE
| Subsystem: | Windows GUI |
|---|---|
| SubsystemVersion: | 4 |
| ImageVersion: | - |
| OSVersion: | 4 |
| EntryPoint: | 0xabde |
| UninitializedDataSize: | - |
| InitializedDataSize: | 166912 |
| CodeSize: | 35840 |
| LinkerVersion: | 8 |
| PEType: | PE32 |
| TimeStamp: | 2022:01:24 16:58:28+01:00 |
| MachineType: | Intel 386 or later, and compatibles |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 24-Jan-2022 15:58:28 |
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: | 24-Jan-2022 15:58:28 |
| 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 | 0x00008BE4 | 0x00008C00 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 5.60788 |
.rsrc | 0x0000C000 | 0x000288CC | 0x00028A00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 2.96901 |
.reloc | 0x00036000 | 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 |
2 | 2.28267 | 67624 | Latin 1 / Western European | UNKNOWN | RT_ICON |
3 | 2.12925 | 38056 | Latin 1 / Western European | UNKNOWN | RT_ICON |
4 | 2.15832 | 21640 | Latin 1 / Western European | UNKNOWN | RT_ICON |
5 | 2.22062 | 16936 | Latin 1 / Western European | UNKNOWN | RT_ICON |
6 | 2.19964 | 9640 | Latin 1 / Western European | UNKNOWN | RT_ICON |
7 | 2.44151 | 4264 | Latin 1 / Western European | UNKNOWN | RT_ICON |
8 | 2.87602 | 2440 | Latin 1 / Western European | UNKNOWN | RT_ICON |
9 | 3.13716 | 1128 | Latin 1 / Western European | UNKNOWN | RT_ICON |
Imports
mscoree.dll |
Total processes
39
Monitored processes
4
Malicious processes
1
Suspicious processes
1
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2824 | "C:\Users\admin\AppData\Local\Temp\Microsoft Excel 2019.exe" | C:\Users\admin\AppData\Local\Temp\Microsoft Excel 2019.exe | Explorer.EXE | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 2624 | "C:\Users\admin\AppData\Roaming\server.exe" | C:\Users\admin\AppData\Roaming\server.exe | Microsoft Excel 2019.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Modules
| |||||||||||||||
| 1252 | netsh firewall add allowedprogram "C:\Users\admin\AppData\Roaming\server.exe" "server.exe" ENABLE | C:\Windows\system32\netsh.exe | — | server.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
| |||||||||||||||
| 1500 | C:\Windows\system32\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503} | C:\Windows\system32\DllHost.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: COM Surrogate Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
Total events
2 503
Read events
2 142
Write events
0
Delete events
0
Modification events
Executable files
1
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 2824 | Microsoft Excel 2019.exe | C:\Users\admin\AppData\Roaming\server.exe | executable | |
MD5:8430F179BB1C0C9614CCE252DA9BA9EE | SHA256:C7165FCF4DA9E920405B33C3FFB1BED74DE3390E60725D0F2B55B4F783EB698E | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
25
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 |
|---|---|---|---|---|---|---|
— | — | 193.161.193.99:50930 | MxQzIsGod-50930.portmap.io | OOO Bitree Networks | RU | malicious |
2624 | server.exe | 193.161.193.99:50930 | MxQzIsGod-50930.portmap.io | OOO Bitree Networks | RU | malicious |
DNS requests
Domain | IP | Reputation |
|---|---|---|
MxQzIsGod-50930.portmap.io |
| malicious |
Threats
PID | Process | Class | Message |
|---|---|---|---|
— | — | Potential Corporate Privacy Violation | ET POLICY DNS Query to a Reverse Proxy Service Observed |
2624 | server.exe | Generic Protocol Command Decode | SURICATA STREAM suspected RST injection |
2624 | server.exe | A Network Trojan was detected | ET TROJAN Generic njRAT/Bladabindi CnC Activity (ll) |