MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b. 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: a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b
SHA3-384 hash: 22e767f2c946c0da8911313f672e2c49165e0cafef06c9e946f01f9b230aedd3109fa030d553a035d22ee86e39c837ba
SHA1 hash: 2794557746edd608a3fbf6765b187d677eb8fb60
MD5 hash: 06d10315ecefa19a49e183d0d41cf5b6
humanhash: delaware-fifteen-utah-july
File name:Ye21ZFy5.exe
Download: download sample
Signature njrat
Create hunting rule
File size:36'864 bytes
First seen:2020-09-25 21:32:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'602 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 384:rcDpMiL3BndznNCyMGmjuu3HJcWYThhrAF+rMRTyN/0L+EcoinblneHQM3epzXMd:wDpRNRMGmjbZdY9hrM+rMRa8NumXt
Threatray 70 similar samples on MalwareBazaar
TLSH 3AF2294D7BE08168C9FE167B05B2D4120777E04F5E23D90D8EE6A4AA36636C18B54EA2
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/65928/
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
Creating a process from a recently created file
Enabling the 'hidden' option for recently created files
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the 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
Launching a tool to kill processes
Creating a file in the mass storage device
Enabling autorun by creating a file
Enabling threat expansion on mass storage devices by creating the autorun.inf autorun file
Result
Threat name:
njRat
Create hunting rule
Detection:
malicious
Classification:
spre.troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/475576
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 autorun.inf (USB autostart)
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
Protects its processes via BreakOnTermination flag
Sigma detected: System File Execution Location Anomaly
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: 290240 Sample: Ye21ZFy5.exe Startdate: 25/09/2020 Architecture: WINDOWS Score: 100 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for dropped file 2->52 54 Antivirus / Scanner detection for submitted sample 2->54 56 13 other signatures 2->56 8 Ye21ZFy5.exe 1 6 2->8         started        13 csrss.exe 3 2->13         started        15 csrss.exe 2 2->15         started        17 csrss.exe 2 2->17         started        process3 dnsIp4 48 192.168.2.1 unknown unknown 8->48 40 C:\ProgramData\csrss.exe, PE32 8->40 dropped 42 C:\Users\user\AppData\...\Ye21ZFy5.exe.log, ASCII 8->42 dropped 44 C:\ProgramData\csrss.exe:Zone.Identifier, ASCII 8->44 dropped 66 Drops PE files with benign system names 8->66 19 csrss.exe 2 12 8->19         started        file5 signatures6 process7 dnsIp8 46 bobbelal20.ddns.net 91.109.188.2, 1177 IELOIELOMainNetworkFR France 19->46 32 C:\svchost.exe, PE32 19->32 dropped 34 C:\...\d915fc9c8cd3cb94bab4664dce96472b.exe, PE32 19->34 dropped 36 C:\svchost.exe:Zone.Identifier, ASCII 19->36 dropped 38 2 other malicious files 19->38 dropped 58 Antivirus detection for dropped file 19->58 60 Multi AV Scanner detection for dropped file 19->60 62 Protects its processes via BreakOnTermination flag 19->62 64 5 other signatures 19->64 24 netsh.exe 3 19->24         started        26 taskkill.exe 1 19->26         started        file9 signatures10 process11 process12 28 conhost.exe 24->28         started        30 conhost.exe 26->30         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-09-25 21:34:06 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uvfu2o5ffaybicpd6w5cpiotwpml7gwv23ynim2uknpzqezntafq._file
Verdict:
malicious
Similar samples:
153e5b1b4b51f9f27c38a24577764a9873ea08467348b5a2db04f2a13c49e291
njrat
51707360e28aa57ec8a8d7f42bc7c9ffe8969b5d19bf39a700cde35c0e4d3846
njrat
66f7b791ad2fba2a0f3d9730a463b0653f9c336923f23fc3826bc80079538d62
njrat
898ab33196c09c002ad6806ff25b8713522c433f8f36f19d4479eef779e3e451
njrat
a084d297f26b39b4edc89b4ec2c006039240c7b6b97ad030f361047b3cb8c6b8
njrat
a7f0ee005b8d98bc8b67e77aa4a10baca21caf5f9deb7891bacc50f713488dd0
njrat
b354fea791d05973e65997e9ef4b1e32359cdc86b6b5e38e745cbae43516e110
njrat
c860daab67ce2cde30c2d82085b7882178e39b17db9a889b7498d872921e4e1f
njrat
da97458433211f9901d8028600bdded7c5a01f1eecebacc488cd02eaa093b5d8
njrat
ed34d4eba0bc7d434f32bb9bca0147632592656ddf0c2aa892fbee54b0850ff1
njrat
+ 60 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/200925-vn9nt9gsf2/
Behaviour
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops autorun.inf file
Modifies service
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
Unpacked files
SH256 hash:
a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b
MD5 hash:
06d10315ecefa19a49e183d0d41cf5b6
SHA1 hash:
2794557746edd608a3fbf6765b187d677eb8fb60
Detections:
win_njrat_w1
Create hunting rule
win_njrat_g1
Create hunting rule
Link:
https://www.unpac.me/results/42eb8438-2096-4df0-a17f-95e080c12a48/
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 a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b

(this sample)

  
Link
https://www.virustotal.com/gui/file/a54b4d3ba528301409e3f5ba27a1d3b3d8bf9ad5d6f0d43354535f98132d980b/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/65928/

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