MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308
SHA3-384 hash: 34ff8f6610bc649079ebdbb92c46565990559b4d6aac068e3668825d3fc9bd23099dffb31a8fa9f52903474e94815f15
SHA1 hash: 20fa7e5e37d41e51d9cdab1761a43e7138ba1aba
MD5 hash: 4368f54cc09a19b09fd6a8af3094e361
humanhash: floor-rugby-hydrogen-lima
File name:AZs3kG7R.exe
Download: download sample
Signature njrat
Create hunting rule
File size:36'864 bytes
First seen:2020-09-26 10:32:21 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 768:FnDrLsKADtOHiR4akrcQU9FkqrM+rMRa8NuC9lt:FnDrCtVSQQU9yV+gRJNF9
Threatray 73 similar samples on MalwareBazaar
TLSH 2AF22A4D7BE08568C5FD467B05B2D41307BBE04B5E23DA0D8EF664EA37236C18F54AA2
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
201
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/66112/
Detection(s):
Win.Trojan.B-468
Create hunting rule

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

Win.Trojan.Generic-6454614-0
Create hunting rule

Win.Trojan.Generic-6454615-0
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
Enabling the 'hidden' option for analyzed file
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Enabling the 'hidden' option for recently created files
Creating a process with a hidden window
Creating a window
DNS request
Connection attempt
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching the process to change the firewall settings
Enabling autorun by creating a file
Result
Threat name:
njRat
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/475828
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to log keystrokes (.Net Source)
Creates autostart registry keys with suspicious names
Detected njRat
Drops PE files to the startup folder
Drops PE files with benign system names
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Uses dynamic DNS services
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: 290364 Sample: AZs3kG7R.exe Startdate: 26/09/2020 Architecture: WINDOWS Score: 100 39 Malicious sample detected (through community Yara rule) 2->39 41 Antivirus detection for dropped file 2->41 43 Antivirus / Scanner detection for submitted sample 2->43 45 13 other signatures 2->45 8 AZs3kG7R.exe 1 6 2->8         started        12 explorer.exe 3 2->12         started        14 explorer.exe 2 2->14         started        16 explorer.exe 2 2->16         started        process3 file4 31 C:\Users\user\AppData\Roaming\explorer.exe, PE32 8->31 dropped 33 C:\Users\...\explorer.exe:Zone.Identifier, ASCII 8->33 dropped 35 C:\Users\user\AppData\...\AZs3kG7R.exe.log, ASCII 8->35 dropped 55 Drops PE files with benign system names 8->55 18 explorer.exe 2 6 8->18         started        signatures5 process6 dnsIp7 37 pulgetirmene.duckdns.org 188.253.227.254, 1604 BAKINTER-ASBakinternetISPAzerbaijanAZ Azerbaijan 18->37 27 C:\...\99ce0d43dd59f9660f3152e1efd301fd.exe, PE32 18->27 dropped 29 99ce0d43dd59f9660f...exe:Zone.Identifier, ASCII 18->29 dropped 47 Antivirus detection for dropped file 18->47 49 System process connects to network (likely due to code injection or exploit) 18->49 51 Multi AV Scanner detection for dropped file 18->51 53 3 other signatures 18->53 23 netsh.exe 3 18->23         started        file8 signatures9 process10 process11 25 conhost.exe 23->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-09-26 10:34:07 UTC
AV detection:
27 of 29 (93.10%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=4f5we2cvvgolsachrpsyrtdtumy3ywqaebfuxf4tf4fmnvyf2mea._file
Verdict:
malicious
Similar samples:
153e5b1b4b51f9f27c38a24577764a9873ea08467348b5a2db04f2a13c49e291
njrat
51707360e28aa57ec8a8d7f42bc7c9ffe8969b5d19bf39a700cde35c0e4d3846
njrat
898ab33196c09c002ad6806ff25b8713522c433f8f36f19d4479eef779e3e451
njrat
910a35ca5d26faf9ede6eabdff5d843cc84ee2086e92602c02b4c6fc45613306
njrat
a084d297f26b39b4edc89b4ec2c006039240c7b6b97ad030f361047b3cb8c6b8
njrat
a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b
njrat
a7f0ee005b8d98bc8b67e77aa4a10baca21caf5f9deb7891bacc50f713488dd0
njrat
b354fea791d05973e65997e9ef4b1e32359cdc86b6b5e38e745cbae43516e110
njrat
ed34d4eba0bc7d434f32bb9bca0147632592656ddf0c2aa892fbee54b0850ff1
njrat
f7520d43549934d17d63e087a02883c12ef5a48c50d0b503e3c64d51ba32201a
njrat
+ 63 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
persistence evasion
Link:
https://tria.ge/reports/200926-rz4kv4mkb6/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
Unpacked files
SH256 hash:
e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308
MD5 hash:
4368f54cc09a19b09fd6a8af3094e361
SHA1 hash:
20fa7e5e37d41e51d9cdab1761a43e7138ba1aba
Detections:
win_njrat_w1
Create hunting rule
win_njrat_g1
Create hunting rule
Link:
https://www.unpac.me/results/372bb2a3-6634-4c6a-8519-c879768f7fbd/
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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 e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308

(this sample)

  
Link
https://www.virustotal.com/gui/file/e17b626855a99cb900478be588cc73a331bc5a00204b4b97932f0ac6d705d308/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/66112/

Comments