MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4b8370a2f9b30c900f56ba9b2a405f5d4febde0515c52647af81b79eaf7febf. 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: c4b8370a2f9b30c900f56ba9b2a405f5d4febde0515c52647af81b79eaf7febf
SHA3-384 hash: 93bc9300ce86d3b083f85272935a61910962609f5f62945a5dce0ef9e3e9025ab0a18a6e4c6ea492e027d60adc39ba73
SHA1 hash: b89aa44dc3c7310b0749a15fac4f3926f6a820b8
MD5 hash: 6d4d962e40d13588f93e90d3ff906df3
humanhash: aspen-speaker-four-romeo
File name:Invo.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:280'064 bytes
First seen:2020-04-17 08:37:24 UTC
Last seen:Never
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:T2BHrTEAlqvaNJE7voA2d4qXDgvKBJFArF2YhnnTMyF:SdjcaNC7v72SqXUvKB8rbtM
Threatray 1'148 similar samples on MalwareBazaar
TLSH A754D125978C2A2FC9AD2234C0893319E779D1A3A583FB1F514CC0FDDE72BC5958639A
Reporter abuse_ch
Tags:COVID-19 exe NanoCore RAT


Avatar
abuse_ch
COVID-19 themed malspam distributing NanoCore RAT:

HELO: vm593.rz.uni-osnabrueck.de
Sending IP: 131.173.17.199
From: "CDC Team" <cdc-covid19@uni-osnabrueck.de>
Subject: Coronavirus update (COVID-19) <victim-email> your neighbors tested positive!
Attachment: CoronaVirus.xlsm

NanoCore RAT payload URL:
http://gbud.webd.pl/cli/Invo.exe

NanoCore RAT C2:
549177.duckdns.org:54917 (137.74.80.220)

Resolves to OVH IP space

Intelligence

File Origin
# of uploads :
1
# of downloads :
110
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.GenericKDZ.66565.15788.1122.UNOFFICIAL
Create hunting rule

Gathering data
Threat name:
ByteCode-MSIL.Trojan.Nanobot
Create hunting rule
Status:
Malicious
First seen:
2020-04-17 00:40:51 UTC
File Type:
PE (.Net Exe)
AV detection:
27 of 31 (87.10%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ys4docrptmymsahvnou3fjaf6xkp5ppakfofezd27anxt2xx727q._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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a032cd20c067b83f1cab391af7671f7ae669de96dbf995f08580b14d218aeccc
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e33ef485c574d639eae34cd252d97aa78c17718190c98a92f7b6dc5a5fc0cd69
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+ 1'138 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 1b0329aa6aad2d2b0a9fc983fad925441fdaf8c5d53c1e878a98e3f0b5466984

NanoCore

Executable exe c4b8370a2f9b30c900f56ba9b2a405f5d4febde0515c52647af81b79eaf7febf

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/341695/
  
Dropped by
MD5 d4177645156c5f3949a32d9c88d32f3e
  
Dropped by
SHA256 1b0329aa6aad2d2b0a9fc983fad925441fdaf8c5d53c1e878a98e3f0b5466984
  
Delivery method
Distributed via web download

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