MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4541445886b88fa17c6ffc7b9c78fa0e22a43981ee45aebae9811896cf75151a. 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


NanoCore


Vendor detections: 4


Intelligence 4 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4541445886b88fa17c6ffc7b9c78fa0e22a43981ee45aebae9811896cf75151a
SHA3-384 hash: cae20afa4c8d966007d3cd1f7b3a524b4ac5d97a1f25d4173417c8f2b445148904500962c2b8739cef5c52b43d461bac
SHA1 hash: 66934fae1ad66dad9c7a4790d11b6f453eb316f7
MD5 hash: 8fa4c468a53900cf4da2372bfb0006e9
humanhash: arizona-mars-maine-georgia
File name:xxx.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:488'960 bytes
First seen:2020-04-02 18:29:34 UTC
Last seen:2020-04-03 13:39:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:A2TwRWtYcWbQhmpZQ2VU4r2zOyHJfBSkvQ4qtkXl+2whT+5qHaqW8cAq9vHHy:9tsbQhmYdzOyHJJSaRykVoa5qttqv
Threatray 1'296 similar samples on MalwareBazaar
TLSH ACA48D3560EA1113C376ABF20BC4B86E92557D332216E6FD21853E8776F164E89C13BE
Reporter abuse_ch
Tags:COVID-19 exe NanoCore RAT


Avatar
abuse_ch
COVID-19 themed malspam distributing NanoCore RAT:

HELO: vmzmta.ufrpe.br
Sending IP: 200.17.137.44
From: Coronavirus <intercoop.reitoria@ufrpe.br>
Subject: Coronavirus update (COVID-19) XXX your neighbors tested positive
Attachment: Coronavirus.xlsm

NanoCore RAT payload URL:http://185.208.211.67/case/xxx.exe
http://185.208.211.67/case/xxx.exe

NanoCore C2:
54811.duckdns.org:54811 (217.182.32.67)

Intelligence

File Origin
# of uploads :
2
# of downloads :
95
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Win.Dropper.Nanocore-7532662-0
Create hunting rule

Gathering data
Threat name:
ByteCode-MSIL.Trojan.Nanobot
Create hunting rule
Status:
Malicious
First seen:
2020-04-02 18:35:29 UTC
File Type:
PE (.Net Exe)
Extracted files:
15
AV detection:
25 of 31 (80.65%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ivauiwegxch2c7dp7r5zy6h2byrkiomb5zc25oxjqemjnt3vcuna._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
dridex
Create hunting rule
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b0a31d8b0c77ceaf0778cb4eaac32a36ed92dd93bb6c1163e85326d75c4fb550
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b205ef7a1d411c72805ad1fb4def5327eea800a5bd76b37e39ea106a8f1d4144
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ea74168507065efc492ed754dc31a2e3f99aa1e96f330db176b1b21cc587af49
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ffe529795aeb73170ee415ca3cc5db2f1c0eb6ebb7cffa0d4f7a886f13a438a6
NanoCore
+ 1'286 additional samples on MalwareBazaar
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:ach_NanoCore
Create hunting rule
Author:abuse.ch
Rule name:Nanocore
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Nanocore in memory
Reference:internal research
Rule name:Nanocore_RAT_Feb18_1
Create hunting rule
Author:Florian Roth
Description:Detects Nanocore RAT
Reference:Internal Research - T2T
Rule name:Nanocore_RAT_Gen_2
Create hunting rule
Author:Florian Roth
Description:Detetcs the Nanocore RAT
Reference:https://www.sentinelone.com/blogs/teaching-an-old-rat-new-tricks/
Rule name:win_nanocore_w0
Create hunting rule
Author: Kevin Breen <kevin@techanarchy.net>

File information

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

Malspam

NanoCore

Excel file xlsm 3c40af3b0d480922a1888dcc95765aa30fa4033dcb08284b4cf0b2e70c6a994c

NanoCore

Executable exe 4541445886b88fa17c6ffc7b9c78fa0e22a43981ee45aebae9811896cf75151a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/334108/
  
Dropped by
MD5 d2f8ee9828a8c81fab29241e293344f6
  
Dropped by
SHA256 3c40af3b0d480922a1888dcc95765aa30fa4033dcb08284b4cf0b2e70c6a994c
  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments