MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


njrat


Vendor detections: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152
SHA3-384 hash: 1bd94b37af74e9470748fd34aedecb398ee239fda81d78a8a078ef432453d27f7eadd0849ada2c592d21dabb2862ceac
SHA1 hash: 368fb6e0e29739f1726e05d766eca263fd62245a
MD5 hash: a8cc8e257f157da63f3d8f888ff5a594
humanhash: fillet-delta-ink-uncle
File name:ecr9BAya.exe
Download: download sample
Signature njrat
Create hunting rule
File size:33'280 bytes
First seen:2020-09-29 01:02:21 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 384:UtzwddppbwZBsoxwqCsG7DaAhNpacAwHVwUu3CAIZ3BiJFR05HVkw3ccNwifGIyG:U9wdXpbwZxoPc7wHVwUzww3ccrfLoRr
Threatray 52 similar samples on MalwareBazaar
TLSH 51E21A4D73648A23C6BE57B89E70864207F1C18B5612EBAF8EC454DA1DA77E41E00EF7
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
179
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/66579/
Detection(s):
Win.Trojan.B-468
Create hunting rule

Win.Trojan.Ratenjay-1
Create hunting rule

Win.Trojan.Bladabindi-6192388-0
Create hunting rule

Win.Trojan.Generic-6417450-0
Create hunting rule

Win.Dropper.njRAT-7436651-0
Create hunting rule

Win.Packed.Generic-7672854-0
Create hunting rule

Win.Packed.Generic-7672855-0
Create hunting rule

Win.Packed.njRAT-7672853-1
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Connection attempt
Creating a process with a hidden window
Creating a window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching the process to change the firewall settings
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/476996
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Contains functionality to log keystrokes (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Creates autostart registry keys with suspicious names
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
Multi AV Scanner detection for submitted file
Uses netsh to modify the Windows network and firewall settings
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 290950 Sample: ecr9BAya.exe Startdate: 29/09/2020 Architecture: WINDOWS Score: 100 25 Malicious sample detected (through community Yara rule) 2->25 27 Antivirus / Scanner detection for submitted sample 2->27 29 Multi AV Scanner detection for submitted file 2->29 31 8 other signatures 2->31 7 ecr9BAya.exe 7 4 2->7         started        11 ecr9BAya.exe 4 2->11         started        13 ecr9BAya.exe 4 2->13         started        15 ecr9BAya.exe 4 2->15         started        process3 dnsIp4 21 103.244.175.116, 4444 CYBERNET-APCyberInternetServicesPvtLtdPK Pakistan 7->21 23 192.168.18.18, 4444 unknown unknown 7->23 33 Creates autostart registry keys with suspicious names 7->33 17 netsh.exe 3 7->17         started        signatures5 process6 process7 19 conhost.exe 17->19         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-09-29 01:04:06 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xglvlnppqfc2ctezs7ihalfnkgpro2exrrnzqxnhx7dsbv66ifja._file
Verdict:
malicious
Similar samples:
0039b78d69f0c4d19035fdc8a5b3508c9a1f69cbb0a7011f2427febadb905aba
njrat
00b11363c9cd9f5e944789c5c8c8f190cb8952e572fcad351c10a0ffe4809765
njrat
08da1c7771ae637a3b09d9d636b97d6cefdd1794fe3de4ade9b676188e057370
njrat
21ac08fc21c99e9c3522c3555adc2e54fdada5297deda9f00304694a47e1a9e6
njrat
7f02a60405c2e31590a11c7c6d0442b36ecd3709644634cc6abeb7f16fd43e59
njrat
82627d2ae3b9f73237e422cd9b5c90aa5ae978e897fae447f06c1ec23e83a778
njrat
b8b65fac514cb8b167eee1426b292e00506d347a5269a17bc76a4c9f28323b98
njrat
c49196fbcc615b4145c095b26fd716cb4540b0b7a58693eaa987ebc485e20865
njrat
cd0133076bb2594d02cc1a9ef7976ce41006ebc60c7f84b64a8199b4801f2ec5
njrat
f2292fec01b4672cf1bd05d2022e7ab814c53378e900cf7679b3917fe317965b
njrat
+ 42 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/200929-p9a4llej3a/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Modifies Windows Firewall
Unpacked files
SH256 hash:
b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152
MD5 hash:
a8cc8e257f157da63f3d8f888ff5a594
SHA1 hash:
368fb6e0e29739f1726e05d766eca263fd62245a
Detections:
win_njrat_w1
Create hunting rule
win_njrat_g1
Create hunting rule
Link:
https://www.unpac.me/results/3574e9ba-b8fb-4f70-ab71-f51631ae1dec/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
NJRat
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CN_disclosed_20180208_c
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://twitter.com/cyberintproject/status/961714165550342146
Rule name:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:win_njrat_w1
Create hunting rule
Author:Brian Wallace @botnet_hunter
Description:Identify njRat

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

njrat

Executable exe b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152

(this sample)

  
Link
https://www.virustotal.com/gui/file/b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/66579/

Comments