MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071
SHA3-384 hash: a9c21533f32a62d666ec968d884730a6f3e0dfb84387624423e1006f3bf88b3d847139264de3943df2d8ff2b021f6ff0
SHA1 hash: 4dee5e04436655414cb68858ae85905173fe3806
MD5 hash: e954344cd5dd08dcec26037873f90de4
humanhash: neptune-skylark-blossom-west
File name:Yb9SeSxN.exe
Download: download sample
Signature njrat
Create hunting rule
File size:32'768 bytes
First seen:2020-09-19 19:23:13 UTC
Last seen:2020-09-19 19:46:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 384:ELfL7vg+c5bsyMjdf3O5dztWW8BKtjT6X4i2V3fCLf6l3IkLDOHYCFXPzlpmIMxN:SfL7vgbsyRWUpVPXmF7P0711
Threatray 253 similar samples on MalwareBazaar
TLSH F1E2E70537AA4703C63D03B94866471647F1CE43453BFB5F5CD9B0EA297B7808E826AB
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
138
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/63743/
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

Result
Verdict:
Malware
Maliciousness:

Behaviour
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/470607
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: 287736 Sample: Yb9SeSxN.exe Startdate: 19/09/2020 Architecture: WINDOWS Score: 100 28 Malicious sample detected (through community Yara rule) 2->28 30 Antivirus / Scanner detection for submitted sample 2->30 32 Multi AV Scanner detection for submitted file 2->32 34 8 other signatures 2->34 7 Yb9SeSxN.exe 7 4 2->7         started        11 Yb9SeSxN.exe 5 2->11         started        14 Yb9SeSxN.exe 4 2->14         started        16 Yb9SeSxN.exe 4 2->16         started        process3 dnsIp4 24 190.167.122.40, 42474 CompaniaDominicanadeTelefonosSADO Dominican Republic 7->24 26 127.0.0.1 unknown unknown 7->26 36 Creates autostart registry keys with suspicious names 7->36 18 netsh.exe 3 7->18         started        22 C:\Users\user\AppData\...\Yb9SeSxN.exe.log, ASCII 11->22 dropped file5 signatures6 process7 process8 20 conhost.exe 18->20         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-09-19 19:25:05 UTC
AV detection:
27 of 29 (93.10%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=o64bd423ftytgujxz3bboteep6tffkti2rzmiq3afrhnf764obyq._file
Verdict:
malicious
Similar samples:
0e61f8818b66588086b40a900bdc330dd8e7b722239149d14efa68fe0cac94a7
njrat
25a7d75162a26a67fbd881ead6e879ff7e1ac8663f31388566a01fdb395ecd78
njrat
5691aaf1f0f061589f0b1e28b72f25fdd63016ee069156c85cacbe5463cf9dbc
njrat
57f4cadd94e18ec3e75d0c0ea8492356410a0227d1319b3d4b7af670f5a82aff
njrat
96e77706123512b6eb8b458250f8ec78becfd53c17f016bd1e61a5b7ddea2cc4
njrat
99451d12e65bc4c5e49d441d9dce0c5be8596f787c238c3dce07ff0da6618459
njrat
9a0b8d04aac91f001774fb5c66bc9ad34dcbf1bdddfa487979b513d8e2c23fe4
njrat
9d43d10209e444403497c7c5d1772df5be9a7ef474989d5eaee7e0719d000126
njrat
b779cf3c5ac6d1303378006f78a87b3cc45d91b0a3493d0c89877e2ba9777ed5
njrat
c49196fbcc615b4145c095b26fd716cb4540b0b7a58693eaa987ebc485e20865
njrat
+ 243 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/200919-7ryhh7kjr2/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Adds Run key to start application
Modifies Windows Firewall
Modifies Windows Firewall
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/77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071

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 77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071

(this sample)

  
Link
https://www.virustotal.com/gui/file/77b811f35b2cf1335137cec2174c847fa652aa68d472c443602c4ed2ffdc7071/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/63743/

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