MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f6204acfaf5b611f3d970a483d6929ec7a37cbc31e5c8977e7267f20026fb1ea. 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: f6204acfaf5b611f3d970a483d6929ec7a37cbc31e5c8977e7267f20026fb1ea
SHA3-384 hash: 7d0395b0f53eeffe03de42762844d11398fec1a6424b478ca743bbbb51893ff8a5b1aa2feef7bd98d6ea94a059152c9e
SHA1 hash: 4823abfcac2c01c9fffce440ba1a1d103551f214
MD5 hash: 04034e1d2f1642d847f9c7033a65625e
humanhash: tango-lima-wolfram-oscar
File name:freeapp.bin
Download: download sample
Signature njrat
Create hunting rule
File size:37'888 bytes
First seen:2020-08-04 12:45:02 UTC
Last seen:Never
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:WMb+ow7BeAaXaEiVpzdmB0O4yUv/Axgp+Z2/v3Y7/KaEd0rAF+rMRTyN/0L+Ecog:1qow7LPOTUv/PI3EWrM+rMRa8Nuqgt
Threatray 44 similar samples on MalwareBazaar
TLSH 24033A4D7FE18168C4FD167B05B2D41207BAE04B6E23D90E8EF564AA37636C18B54AF2
Reporter JAMESWT_WT
Tags:NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
262
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/38658/
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

Win.Packed.Bladabindi-7994427-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Enabling the 'hidden' option for analyzed file
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Enabling the 'hidden' option for files in the %temp% directory
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/409384
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Changes security center settings (notifications, updates, antivirus, firewall)
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
Protects its processes via BreakOnTermination flag
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 dnsIp2 2 Behavior Graph ID: 256964 Sample: freeapp.bin Startdate: 04/08/2020 Architecture: WINDOWS Score: 100 43 fkesaulka.ddns.net 2->43 51 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 Detected njRat 2->55 57 11 other signatures 2->57 9 freeapp.exe 1 6 2->9         started        13 svchost.exe 2->13         started        15 svchost.exe 1 1 2->15         started        18 10 other processes 2->18 signatures3 process4 dnsIp5 37 C:\Users\user\AppData\Local\...\svchost.exe, PE32 9->37 dropped 39 C:\Users\user\...\svchost.exe:Zone.Identifier, ASCII 9->39 dropped 41 C:\Users\user\AppData\...\freeapp.exe.log, ASCII 9->41 dropped 67 Drops PE files with benign system names 9->67 20 svchost.exe 3 6 9->20         started        69 Changes security center settings (notifications, updates, antivirus, firewall) 13->69 25 MpCmdRun.exe 1 13->25         started        49 127.0.0.1 unknown unknown 15->49 file6 signatures7 process8 dnsIp9 45 fkesaulka.ddns.net 31.207.171.89, 1604, 49729, 49732 INTERSVYAZ-AS38-BKomsomolskyprospektRU Russian Federation 20->45 47 192.168.2.1 unknown unknown 20->47 33 C:\...\ef37b3af0fdf6571928213c4c4e97b3a.exe, PE32 20->33 dropped 35 ef37b3af0fdf657192...exe:Zone.Identifier, ASCII 20->35 dropped 59 System process connects to network (likely due to code injection or exploit) 20->59 61 Protects its processes via BreakOnTermination flag 20->61 63 Machine Learning detection for dropped file 20->63 65 2 other signatures 20->65 27 netsh.exe 3 20->27         started        29 conhost.exe 25->29         started        file10 signatures11 process12 process13 31 conhost.exe 27->31         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f6204acfaf5b611f3d970a483d6929ec7a37cbc31e5c8977e7267f20026fb1ea/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-08-04 12:43:46 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
45 of 48 (93.75%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=6yqevt5plnqr6pmxbjed22jj5r5dps6ddzois57hez7saatpwhva._file
Verdict:
malicious
Similar samples:
25f59abfbdb775126b69112b260fae983e35bd6da0e6e13ad8fc7343da8540ec
njrat
5947d6a7fc4014628b957c4ed8ffff7c961f37f155cb814224a89e1f3700f060
njrat
62a5cd1fc65cdb2b773565e9861a48f139ee961156b38e26016c28a23fc896cc
njrat
abafeafa173768d556241bb6797fc4555b2358ce8d0dfdd81bab9f5f152c077f
njrat
b3a40e1d85f1e1608acf07414a8dea2730c0de0d824bc6165856b8fe00e8ed3d
njrat
ba38f08588d75d7ffd054253f4afd1d9803c2c0f5f390f35214c0b552840793d
njrat
dfa0c14670f8df1eac3e005262e901622c0ec1ccdcc91fd8aedb93da5a32ad64
njrat
e7e5f0ac865dd8cec6539a3defbd09f15df7822b647fcd2e2f53555be98ad8e2
njrat
ed34d4eba0bc7d434f32bb9bca0147632592656ddf0c2aa892fbee54b0850ff1
njrat
f0caf48005d504dfb402e3ef4b137187e9ffa0d903099222560d7f4a8885358d
njrat
+ 34 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/200804-ezg9hyyzq2/
Behaviour
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Adds Run key to start application
Loads dropped DLL
Drops startup file
Drops startup file
Executes dropped EXE
Modifies Windows Firewall
Executes dropped EXE
Modifies Windows Firewall
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Hupigeon
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f6204acfaf5b611f3d970a483d6929ec7a37cbc31e5c8977e7267f20026fb1ea

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.

Cape
Cape
https://www.capesandbox.com/analysis/38658/

Comments