MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4
SHA3-384 hash: 97f08ad8a462975cef47c43d87eea9bdbef3136b42152f19df36a21cbcf9288608f41429041391a0754aa2d4ee459afe
SHA1 hash: fc2ceee288f8bff23072a34c29ccd35237c9418f
MD5 hash: 82cfe2c16b0cebc385bf2619dc87b328
humanhash: spring-berlin-beryllium-hawaii
File name:4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4
Download: download sample
Signature njrat
Create hunting rule
File size:1'355'264 bytes
First seen:2021-02-28 07:11:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 2e5467cba76f44a088d39f78c5e807b6 (131 x DCRat, 112 x njrat, 79 x RedLineStealer)
ssdeep 24576:w8RnvZoptxQdTvVCGXiXreDVkWyVJcx2vBG/RbghXAfUj0lX:3RnaivVCQiXr0VSopt1
TLSH F955BD0B13F04E8FD78B9570700CB620B7F8CB1A6EA45B816214DD8A79B7DB04B97979
Reporter JAMESWT_WT
Tags:NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
124
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4
Verdict:
Malicious activity
Analysis date:
2021-02-28 07:43:09 UTC
Tags:
rat njrat bladabindi
Link:
https://app.any.run/tasks/018e144d-0e08-482d-9d67-0e12b3e51e3b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
EnigmaStub
Create hunting rule
Link:
https://www.capesandbox.com/analysis/119824/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a process with a hidden window
Enabling the 'hidden' option for analyzed file
Creating a file
Enabling the 'hidden' option for recently created files
Creating a window
Using the Windows Management Instrumentation requests
Searching for the window
Connection attempt
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
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
njRat
Create hunting rule
Detection:
malicious
Classification:
spre.troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/621104
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
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Drops PE files to the startup folder
Drops PE files with benign system names
Hides threads from debuggers
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
PE file has nameless sections
Protects its processes via BreakOnTermination flag
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: 359545 Sample: JyDKJsiAu5 Startdate: 28/02/2021 Architecture: WINDOWS Score: 100 38 Malicious sample detected (through community Yara rule) 2->38 40 Antivirus detection for dropped file 2->40 42 Antivirus / Scanner detection for submitted sample 2->42 44 12 other signatures 2->44 7 JyDKJsiAu5.exe 3 11 2->7         started        12 JyDKJsiAu5.exe 3 2->12         started        14 JyDKJsiAu5.exe 2 2->14         started        16 JyDKJsiAu5.exe 2 2->16         started        process3 dnsIp4 36 195.123.246.161, 2027, 49733, 49738 GREENFLOID-ASUA Bulgaria 7->36 26 C:\svchost.exe, PE32 7->26 dropped 28 C:\...\6c802f7ea9328e6be72b350b79b130c7.exe, PE32 7->28 dropped 30 C:\svchost.exe:Zone.Identifier, ASCII 7->30 dropped 34 2 other malicious files 7->34 dropped 46 Detected unpacking (changes PE section rights) 7->46 48 Detected unpacking (overwrites its own PE header) 7->48 50 Protects its processes via BreakOnTermination flag 7->50 54 4 other signatures 7->54 18 taskkill.exe 1 7->18         started        20 netsh.exe 1 3 7->20         started        32 C:\Users\user\AppData\...\JyDKJsiAu5.exe.log, ASCII 12->32 dropped 52 Hides threads from debuggers 12->52 file5 signatures6 process7 process8 22 conhost.exe 18->22         started        24 conhost.exe 20->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4/
Threat name:
Win32.Packed.EnigmaProtector
Create hunting rule
Status:
Malicious
First seen:
2021-02-26 20:20:05 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  1/5
Verdict:
malicious
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/210228-tyjn3yplbe/
Behaviour
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops autorun.inf file
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Drops startup file
Modifies Windows Firewall
Unpacked files
SH256 hash:
4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4
MD5 hash:
82cfe2c16b0cebc385bf2619dc87b328
SHA1 hash:
fc2ceee288f8bff23072a34c29ccd35237c9418f
Link:
https://www.unpac.me/results/70cb5c54-2281-4ce9-b294-e1ab5f2be758/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4dec399c785ed12108ec1f383345ca6bccf12542d2037ee0d6bee4945fd71fd4

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:EnigmaStub
Create hunting rule
Author:@bartblaze
Description:Identifies Enigma packer stub.
Rule name:SUSP_XORed_URL_in_EXE
Create hunting rule
Author:Florian Roth
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:win_njrat_g1
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann<at>fkie.fraunhofer.de>
Rule name:win_njrat_w1
Create hunting rule
Author:Brian Wallace @botnet_hunter <bwall@ballastsecurity.net>
Description:Identify njRat
Rule name:win_smominru_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/119824/

Comments