MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3feb1f837ab57c218bfb325fb808534d1f25ff26ff7a3a75578dc165c8a3ff4. 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: 7


Intelligence 7 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a3feb1f837ab57c218bfb325fb808534d1f25ff26ff7a3a75578dc165c8a3ff4
SHA3-384 hash: 4c6672df77fe02f0c4aec8cc15e32ed4b7c7d4197f8f3594af473eff46d46eda63346d2742a3b81335977b0873417f85
SHA1 hash: 68f666e20ef602bac987a5954c50683d872c53b6
MD5 hash: d0f98f79cdf27573eec72d70ca44a120
humanhash: butter-xray-batman-wyoming
File name:acgcBitf.exe
Download: download sample
Signature njrat
Create hunting rule
File size:32'768 bytes
First seen:2020-10-30 02:47:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 384:AZL//7D7UtkcwEuvmpjVPArBnTihdzhWOc1WZrfCPsi2V7LSnhoEkLDOHYCFXPzm:Ap//7D7Uttkm7P9SUpV/XmF7g715
Threatray 387 similar samples on MalwareBazaar
TLSH C1E2E70533AA4703C67D17B9086647164BF1CE834537FB5F4CD9B4EA2E7B7808A416AB
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
117
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/81131/
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
Sending a UDP request
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Creating a process with a hidden window
Enabling the 'hidden' option for recently created files
Enabling the 'hidden' option for files in the %temp% directory
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
Creating a file in the mass storage device
Enabling autorun by creating a file
Enabling a "Do not show hidden files" option
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/516697
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 the view of files in windows explorer (hidden files and folders)
Contains functionality to log keystrokes (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Creates autostart registry keys with suspicious names
Drops PE files to the startup folder
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
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: 307453 Sample: acgcBitf.exe Startdate: 30/10/2020 Architecture: WINDOWS Score: 100 32 Malicious sample detected (through community Yara rule) 2->32 34 Antivirus detection for dropped file 2->34 36 Antivirus / Scanner detection for submitted sample 2->36 38 10 other signatures 2->38 8 acgcBitf.exe 3 5 2->8         started        11 system-file.exe 3 2->11         started        13 system-file.exe 2 2->13         started        15 system-file.exe 2 2->15         started        process3 file4 28 C:\Users\user\AppData\...\system-file.exe, PE32 8->28 dropped 17 system-file.exe 4 5 8->17         started        process5 dnsIp6 30 midoalhashmi1.ddns.net 141.255.144.10, 5115 IELOIELOMainNetworkFR France 17->30 26 C:\...\cdcbe812f1ad80046075a62b076eea3d.exe, PE32 17->26 dropped 40 Antivirus detection for dropped file 17->40 42 Machine Learning detection for dropped file 17->42 44 Changes the view of files in windows explorer (hidden files and folders) 17->44 46 2 other signatures 17->46 22 netsh.exe 1 3 17->22         started        file7 signatures8 process9 process10 24 conhost.exe 22->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a3feb1f837ab57c218bfb325fb808534d1f25ff26ff7a3a75578dc165c8a3ff4/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-10-30 02:49:04 UTC
AV detection:
28 of 29 (96.55%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=up7ld6bxvnl4egf7wms7xaefgti7ex7sn732hj2vpdobmxekh72a._file
Verdict:
malicious
Similar samples:
0be50f5dccff35823a1735e676485141e3194cd4027cc0518c86f743284dce44
njrat
14ba5f94a671a38e16b5166ebca44ddacd6fde3226015676f9c369c992b5d2f8
njrat
2b942243439c92b4921032a08567d76c0baff766661083fe8f6a9ab66966926d
njrat
5691aaf1f0f061589f0b1e28b72f25fdd63016ee069156c85cacbe5463cf9dbc
njrat
72186f2bd535a54efe912025ee41ff582ea5eeeb08709988e7e89e3822dbf391
njrat
9a0b8d04aac91f001774fb5c66bc9ad34dcbf1bdddfa487979b513d8e2c23fe4
njrat
af21243da675a515c8e2ca9d00b5628c1201125b1a29d46a9df0cb0b63769942
njrat
b2a9afcf53b4804d0d6b525b0480c1e01f72a151c536d2436e1ae2017d7bcccb
njrat
c49196fbcc615b4145c095b26fd716cb4540b0b7a58693eaa987ebc485e20865
njrat
f2292fec01b4672cf1bd05d2022e7ab814c53378e900cf7679b3917fe317965b
njrat
+ 377 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/201030-whx14hf5jj/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
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: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:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
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 a3feb1f837ab57c218bfb325fb808534d1f25ff26ff7a3a75578dc165c8a3ff4

(this sample)

  
Link
https://www.virustotal.com/gui/file/a3feb1f837ab57c218bfb325fb808534d1f25ff26ff7a3a75578dc165c8a3ff4/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/81131/

Comments