MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f. 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: 11


Intelligence 11 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f
SHA3-384 hash: 91a8918dc3289ecb84ca04f7f60d5343db5e46ecfdf59e43bac87cde336192b8ee1038aa08e08ab70be0cb28dbf56fd5
SHA1 hash: 6cbd7608018a7d503e653f444004ca525d90875c
MD5 hash: 98f22cce467d54a330bbbce9a0261a5a
humanhash: quebec-jersey-october-fanta
File name:zrr4Nw19.exe
Download: download sample
Signature njrat
Create hunting rule
File size:28'672 bytes
First seen:2021-01-02 02:49:41 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 384:cL3/By/kWBSaZZmi5C/T9AQeqLlVhPLgNh0Bbr1oSszyLTHcXIR+vene9ueZ2C:65y/kWkgzq1eolPcb0x15iueZ2C
Threatray 5 similar samples on MalwareBazaar
TLSH 4FD2081AB3E1C711C6AD07328566C36303B1E257953AFB3E1CDA58D65F236908BC5BE2
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
366
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
zrr4Nw19.exe
Verdict:
Malicious activity
Analysis date:
2021-01-02 02:51:56 UTC
Tags:
rat njrat bladabindi
Link:
https://app.any.run/tasks/1584f883-0286-40ba-b730-4dd40213740c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/110277/
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.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

Win.Packed.Generic-9795615-0
Create hunting rule

Win.Packed.Generic-9795616-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Sending a custom TCP request
Sending a UDP request
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Creating a process with a hidden window
Creating a window
Connection attempt
Unauthorized injection to a recently created process
Launching the process to change the firewall settings
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a 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:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/572887
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
Changes security center settings (notifications, updates, antivirus, firewall)
Connects to a pastebin service (likely for C&C)
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: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
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: 335506 Sample: zrr4Nw19.exe Startdate: 02/01/2021 Architecture: WINDOWS Score: 100 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for dropped file 2->50 52 Antivirus / Scanner detection for submitted sample 2->52 54 14 other signatures 2->54 8 zrr4Nw19.exe 16 5 2->8         started        13 svchost.exe 2->13         started        15 svchost.exe 2->15         started        17 10 other processes 2->17 process3 dnsIp4 42 pastebin.com 104.23.99.190, 443, 49717, 49719 CLOUDFLARENETUS United States 8->42 44 192.168.2.1 unknown unknown 8->44 34 C:\Users\user\AppData\Roaming\svchost.exe, PE32 8->34 dropped 36 C:\Users\user\AppData\...\zrr4Nw19.exe.log, ASCII 8->36 dropped 64 Drops PE files with benign system names 8->64 19 svchost.exe 18 3 8->19         started        66 Changes security center settings (notifications, updates, antivirus, firewall) 13->66 24 MpCmdRun.exe 13->24         started        68 System process connects to network (likely due to code injection or exploit) 15->68 46 127.0.0.1 unknown unknown 17->46 file5 signatures6 process7 dnsIp8 38 52.188.21.69, 49723, 49724, 49727 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 19->38 40 pastebin.com 19->40 32 C:\...\15ea4944f270282d46a1f0dd4d332e8f.exe, PE32 19->32 dropped 56 Antivirus detection for dropped file 19->56 58 System process connects to network (likely due to code injection or exploit) 19->58 60 Multi AV Scanner detection for dropped file 19->60 62 3 other signatures 19->62 26 netsh.exe 1 3 19->26         started        28 conhost.exe 24->28         started        file9 signatures10 process11 process12 30 conhost.exe 26->30         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2021-01-02 02:50:05 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pyy3hjqdv7r2ar2f6nmypwynsdrgintwxeqn6imf4enoa2wtfjhq._file
Verdict:
malicious
Similar samples:
758aed1d47c292461a1234024fd162f05a850122842160793c72e389b829d0b4
njrat
81337231c53d0927b5aaff1792d71b5f5270e268e1909267ad3bd79951e72642
njrat
9e17a9c1b1d0db2c9cd8fdf42c475712f8faaa68cb08bbff910a2927b910d88f
njrat
de129b85c2c4cd0e7d1817d2a8b3095d02ef8880f6273c88c0ff3cd48a9a9dd8
njrat
f230a396fdf98fb0a561e33d5fffcc3638531f2fa14b736faa449c459e05dab2
njrat
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat evasion persistence trojan
Link:
https://tria.ge/reports/210102-d6xyjrefbe/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
njRAT/Bladabindi
Unpacked files
SH256 hash:
7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f
MD5 hash:
98f22cce467d54a330bbbce9a0261a5a
SHA1 hash:
6cbd7608018a7d503e653f444004ca525d90875c
Detections:
win_njrat_g1
Create hunting rule
win_njrat_w1
Create hunting rule
Link:
https://www.unpac.me/results/33326296-2a8c-4564-a82d-cc4b5875f00f/
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/7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f

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:INDICATOR_SUSPICIOUS_EXE_RawPaste_URL
Create hunting rule
Author:ditekSHen
Description:Detects executables containing URLs to raw contents of a paste
Rule name:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
Rule name:Unknown_Malware_Sample_Jul17_2
Create hunting rule
Author:Florian Roth
Description:Detects unknown malware sample with pastebin RAW URL
Reference:https://goo.gl/iqH8CK
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 7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f

(this sample)

  
Link
https://www.virustotal.com/gui/file/7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/110277/

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