| File name: | Nj-Builder.exe |
| Full analysis: | https://app.any.run/tasks/8d59376f-bb64-4dd4-acdd-081b70102262 |
| Verdict: | Malicious activity |
| Threats: | Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. |
| Analysis date: | March 29, 2025, 22:49:52 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32+ executable (GUI) x86-64, for MS Windows, 6 sections |
| MD5: | C636801035C0B11BCD1244132DE12A55 |
| SHA1: | 428C4D84482AF7D5822F46B6614791EA03AACD15 |
| SHA256: | BCD8105EF53E923C9E55E15DD39B2DC022D8A120AF234BA634A77CF500DABFEB |
| SSDEEP: | 49152:QuHhEqWiBSoOWHMfxrOVxRUAQnga5IqyMrpbDvAYLLeCz2PIfoOKyLP5HmiOBDN5:QuHhEqpBqCl6ga5pN/ALm2PIDK4PZmDg |
MALICIOUS
Actions looks like stealing of personal data
- Nj-Builder.exe (PID: 7432)
SUSPICIOUS
Process drops legitimate windows executable
- Nj-Builder.exe (PID: 7432)
Executable content was dropped or overwritten
- Nj-Builder.exe (PID: 7432)
Executes application which crashes
- Nj-Builder.exe (PID: 7432)
INFO
Reads the computer name
- Nj-Builder.exe (PID: 7432)
Creates files or folders in the user directory
- Nj-Builder.exe (PID: 7432)
- WerFault.exe (PID: 7600)
Checks supported languages
- Nj-Builder.exe (PID: 7432)
The sample compiled with english language support
- Nj-Builder.exe (PID: 7432)
Checks proxy server information
- Nj-Builder.exe (PID: 7432)
- slui.exe (PID: 7876)
Reads the software policy settings
- slui.exe (PID: 7876)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Win64 Executable (generic) (87.3) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (6.3) |
| .exe | | | DOS Executable Generic (6.3) |
EXIF
EXE
| MachineType: | AMD AMD64 |
|---|---|
| TimeStamp: | 2025:03:29 22:35:05+00:00 |
| ImageFileCharacteristics: | Executable, Large address aware |
| PEType: | PE32+ |
| LinkerVersion: | 14.43 |
| CodeSize: | 425472 |
| InitializedDataSize: | 231936 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x67200 |
| OSVersion: | 6 |
| ImageVersion: | - |
| SubsystemVersion: | 6 |
| Subsystem: | Windows GUI |
Total processes
125
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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7432 | "C:\Users\admin\Desktop\Nj-Builder.exe" | C:\Users\admin\Desktop\Nj-Builder.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 3221225477 Modules
| |||||||||||||||
| 7600 | C:\WINDOWS\system32\WerFault.exe -u -p 7432 -s 1128 | C:\Windows\System32\WerFault.exe | — | Nj-Builder.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Problem Reporting Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7876 | C:\WINDOWS\System32\slui.exe -Embedding | C:\Windows\System32\slui.exe | svchost.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Activation Client Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
5 484
Read events
5 484
Write events
0
Delete events
0
Modification events
Executable files
7
Suspicious files
4
Text files
1
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 7600 | WerFault.exe | C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_Nj-Builder.exe_99a19de87bd78f4bba79ef99581fa61cc8cc92d_8c949426_9c573112-4253-4774-ad1e-804a2fa9fd36\Report.wer | — | |
MD5:— | SHA256:— | |||
| 7432 | Nj-Builder.exe | C:\Users\admin\AppData\Roaming\26b799fa89ba8c8f.bin | binary | |
MD5:9A77572368D9DAC86D66D50D3B724465 | SHA256:7AC43009601790F7A8041E3DE6B6B2256463752EDBF8890788D84FE6FDD56739 | |||
| 7600 | WerFault.exe | C:\ProgramData\Microsoft\Windows\WER\Temp\WERD833.tmp.xml | xml | |
MD5:84A2CFAFDA06932EA4E70E39FB11D978 | SHA256:833CDD2EB14CB7F26CEE113C5274D20426687C331BBED4C24EEFACE0E27553A2 | |||
| 7600 | WerFault.exe | C:\Users\admin\AppData\Local\CrashDumps\Nj-Builder.exe.7432.dmp | binary | |
MD5:E629DBDF8A96B5072FA350218F4E95C2 | SHA256:ECE9597841C9135B19C8084356C22F1A420104A9399D6B4C8C4AFD18134ADB0F | |||
| 7432 | Nj-Builder.exe | C:\ProgramData\Adobe\ARM\S\388\AdobeARMHelper.exe | executable | |
MD5:33344B713B9E59FA704D05682ADB3BEE | SHA256:B8329E19DB712D566447F8D330DC60FD1BE5959292AB8BAE8AFC8545ED0584E9 | |||
| 7600 | WerFault.exe | C:\ProgramData\Microsoft\Windows\WER\Temp\WERD813.tmp.WERInternalMetadata.xml | binary | |
MD5:D3B314653D1CA592FCA974B150C6ECED | SHA256:0518360D985D06187BF227396F1FD7D371636515CB56C12ADA74B65A152F9755 | |||
| 7432 | Nj-Builder.exe | C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe | executable | |
MD5:A21048F73433ECCCCC494AADF2D9DA4B | SHA256:3F3541133ED0BB39C2BD0E6CFB288637149C0A57D212E18D89A1031B343D423D | |||
| 7432 | Nj-Builder.exe | C:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe | executable | |
MD5:56EE5B68FAE6ABD154A0B980912077C4 | SHA256:F2732B6796D2AC750F4E9BFE35B785C3DB9E7B9E7A9CA6B26641E78232751A64 | |||
| 7432 | Nj-Builder.exe | C:\Program Files\Common Files\microsoft shared\ClickToRun\officesvcmgr.exe | executable | |
MD5:57E3132E944035CA40C469672AE78D49 | SHA256:87BC0591A45A2E2FA7E4F76EC12451D4FD14CFAB6AA9FB476288A3958049AB52 | |||
| 7600 | WerFault.exe | C:\ProgramData\Microsoft\Windows\WER\Temp\WERD728.tmp.dmp | binary | |
MD5:39D0216FA90ED100C267389E4448FE79 | SHA256:8CC2AF132EFF632ED8174D3371CA22218BC1E8376123E9E3286416620913E79A | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
23
DNS requests
8
Threats
6
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
7432 | Nj-Builder.exe | POST | 200 | 52.11.240.239:80 | http://pywolwnvd.biz/unihrbwjybue | unknown | — | — | malicious |
7432 | Nj-Builder.exe | POST | 200 | 13.213.51.196:80 | http://ssbzmoy.biz/ffrdpoogofu | unknown | — | — | malicious |
7432 | Nj-Builder.exe | POST | 200 | 3.229.117.57:80 | http://npukfztj.biz/eajlkgsaqywuwejk | unknown | — | — | malicious |
7432 | Nj-Builder.exe | POST | 200 | 52.11.240.239:80 | http://cvgrf.biz/ftfcdllniee | unknown | — | — | malicious |
— | — | POST | 500 | 20.83.72.98:443 | https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail | unknown | xml | 512 b | whitelisted |
— | — | POST | 500 | 40.91.76.224:443 | https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail | unknown | xml | 512 b | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 51.124.78.146:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
7432 | Nj-Builder.exe | 52.11.240.239:80 | pywolwnvd.biz | AMAZON-02 | US | malicious |
7432 | Nj-Builder.exe | 13.213.51.196:80 | ssbzmoy.biz | AMAZON-02 | SG | malicious |
7432 | Nj-Builder.exe | 3.229.117.57:80 | npukfztj.biz | AMAZON-AES | US | malicious |
1348 | slui.exe | 40.91.76.224:443 | activation-v2.sls.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
7876 | slui.exe | 20.83.72.98:443 | activation-v2.sls.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
pywolwnvd.biz |
| malicious |
ssbzmoy.biz |
| malicious |
cvgrf.biz |
| malicious |
npukfztj.biz |
| malicious |
activation-v2.sls.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value Snkz |
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value btst |
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value Snkz |
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value btst |
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value Snkz |
7432 | Nj-Builder.exe | A Network Trojan was detected | ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value btst |