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| File name: | njcrypt.exe |
| Full analysis: | https://app.any.run/tasks/532e6be7-2c35-44bc-8ac6-53b524653f16 |
| 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: | November 16, 2019, 21:13:44 |
| 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: | 8DCB5BC28DF8544A340307EA067E650D |
| SHA1: | 46E1BFE6A30FA35ED005A2F6E9FAB83296212DBB |
| SHA256: | 76E4494A8C254AD572B4F8F54496B57F5D4CE36D5BF94D46029106DC94BFAC75 |
| SSDEEP: | 3072:Z7jWwIG4KA49iS+I8icyKeewEoSHV3q7mC4/5wL/mJn4S+KEjE5gaq:YDc9z+I8sZSoaoaTRwS94z6ga |
MALICIOUS
Uses Task Scheduler to run other applications
- njcrypt.exe (PID: 2564)
Loads the Task Scheduler COM API
- schtasks.exe (PID: 3948)
NJRAT was detected
- njcrypt.exe (PID: 1160)
- njcrypt.exe (PID: 1160)
Connects to CnC server
- njcrypt.exe (PID: 1160)
SUSPICIOUS
Application launched itself
- njcrypt.exe (PID: 2564)
Creates files in the user directory
- njcrypt.exe (PID: 2564)
Executable content was dropped or overwritten
- njcrypt.exe (PID: 2564)
Uses NETSH.EXE for network configuration
- njcrypt.exe (PID: 1160)
INFO
No info indicators.
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .dll | | | Win32 Dynamic Link Library (generic) (43.5) |
|---|---|---|
| .exe | | | Win32 Executable (generic) (29.8) |
| .exe | | | Generic Win/DOS Executable (13.2) |
| .exe | | | DOS Executable Generic (13.2) |
EXIF
EXE
| AssemblyVersion: | 1.0.0.0 |
|---|---|
| ProductVersion: | 1.0.0.0 |
| ProductName: | MultithreadingPractice |
| OriginalFileName: | MultithreadingPractice.exe |
| LegalTrademarks: | - |
| LegalCopyright: | Copyright © Washington State Employment Security 2018 |
| InternalName: | MultithreadingPractice.exe |
| FileVersion: | 1.0.0.0 |
| FileDescription: | MultithreadingPractice |
| CompanyName: | Washington State Employment Security |
| Comments: | - |
| CharacterSet: | Unicode |
| LanguageCode: | Neutral |
| FileSubtype: | - |
| ObjectFileType: | Executable application |
| FileOS: | Win32 |
| FileFlags: | (none) |
| FileFlagsMask: | 0x003f |
| ProductVersionNumber: | 1.0.0.0 |
| FileVersionNumber: | 1.0.0.0 |
| Subsystem: | Windows GUI |
| SubsystemVersion: | 4 |
| ImageVersion: | - |
| OSVersion: | 4 |
| EntryPoint: | 0x30fde |
| UninitializedDataSize: | - |
| InitializedDataSize: | 2560 |
| CodeSize: | 192512 |
| LinkerVersion: | 8 |
| PEType: | PE32 |
| TimeStamp: | 2019:11:03 09:04:01+01:00 |
| MachineType: | Intel 386 or later, and compatibles |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 03-Nov-2019 08:04:01 |
| Comments: | - |
| CompanyName: | Washington State Employment Security |
| FileDescription: | MultithreadingPractice |
| FileVersion: | 1.0.0.0 |
| InternalName: | MultithreadingPractice.exe |
| LegalCopyright: | Copyright © Washington State Employment Security 2018 |
| LegalTrademarks: | - |
| OriginalFilename: | MultithreadingPractice.exe |
| ProductName: | MultithreadingPractice |
| 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: | 03-Nov-2019 08:04:01 |
| 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 | 0x0002EFE4 | 0x0002F000 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 7.31467 |
.rsrc | 0x00032000 | 0x00000800 | 0x00000800 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 3.62966 |
.reloc | 0x00034000 | 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 | 5.00112 | 490 | UNKNOWN | UNKNOWN | RT_MANIFEST |
Imports
mscoree.dll |
Total processes
39
Monitored processes
4
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process |
|---|---|---|---|---|
| 2564 | "C:\Users\admin\AppData\Local\Temp\njcrypt.exe" | C:\Users\admin\AppData\Local\Temp\njcrypt.exe | explorer.exe | |
User: admin Company: Washington State Employment Security Integrity Level: MEDIUM Description: MultithreadingPractice Exit code: 0 Version: 1.0.0.0 | ||||
| 3948 | "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PnkSPUfcqH" /XML "C:\Users\admin\AppData\Local\Temp\tmp620B.tmp" | C:\Windows\System32\schtasks.exe | — | njcrypt.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) | ||||
| 1160 | "C:\Users\admin\AppData\Local\Temp\njcrypt.exe" | C:\Users\admin\AppData\Local\Temp\njcrypt.exe | njcrypt.exe | |
User: admin Company: Washington State Employment Security Integrity Level: MEDIUM Description: MultithreadingPractice Version: 1.0.0.0 | ||||
| 1792 | netsh firewall add allowedprogram "C:\Users\admin\AppData\Local\Temp\njcrypt.exe" "njcrypt.exe" ENABLE | C:\Windows\system32\netsh.exe | — | njcrypt.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
181
Read events
105
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 | |
|---|---|---|---|---|
| 2564 | njcrypt.exe | C:\Users\admin\AppData\Local\Temp\tmp620B.tmp | — | |
MD5:— | SHA256:— | |||
| 2564 | njcrypt.exe | C:\Users\admin\AppData\Roaming\PnkSPUfcqH.exe | executable | |
MD5:8DCB5BC28DF8544A340307EA067E650D | SHA256:76E4494A8C254AD572B4F8F54496B57F5D4CE36D5BF94D46029106DC94BFAC75 | |||
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
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 |
|---|---|---|---|---|---|---|
1160 | njcrypt.exe | 107.167.244.67:31922 | — | — | US | malicious |
DNS requests
Threats
PID | Process | Class | Message |
|---|---|---|---|
1160 | njcrypt.exe | A Network Trojan was detected | MALWARE [PTsecurity] njRAT/Bladabindi |
1160 | njcrypt.exe | A Network Trojan was detected | MALWARE [PTsecurity] njRAT.Gen RAT outbound connection |
4 ETPRO signatures available at the full report