MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b09a7fa4d80c792d50d5d81b9ffdd5a1511ae05958cceb464fa44f9cbbba347. 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: 9

Intelligence 9 IOCs YARA 5 File information Comments

SHA256 hash:	4b09a7fa4d80c792d50d5d81b9ffdd5a1511ae05958cceb464fa44f9cbbba347
SHA3-384 hash:	d942a0601f730d5c7dad8d57bca215244544c1d933e6fdf813e62a2c91994819508d274800286b62fc3009612f498b45
SHA1 hash:	62f2546440b0f79e550d7d321826ba84e88c5ad9
MD5 hash:	63830b37afc33b91d9a4b74875f30c17
humanhash:	may-sierra-social-quiet
File name:	Contract-CSPL418819-20 RS.2360.exe
Download:	download sample
Signature	NanoCore Create hunting rule
File size:	416'768 bytes
First seen:	2020-08-19 11:21:59 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep	6144:hpCVDyw+JD7k80ang7d2GwJw6ILsKHME7nJvlEw/pnl5Yjlk42IzL8upt88O4stt:PCVGw4nHg52G6ELRHflxdYiqTbsthj
Threatray	1'208 similar samples on MalwareBazaar
TLSH	6994F158B654B24FC82F8D7EA9A45CB447A0B577630BF2079C4799EE5E0CFE18E005E2
Reporter	abuse_ch
Tags:	exe NanoCore RAT

abuse_ch

Malspam distributing NanoCore:

HELO: gmail.com
Sending IP: 81.171.9.143
From: Ms. Ishardas <chomi0605@panpacific.co.kr>
Reply-To: Ms. Ishardas <surnit9041@gmail.com>
Subject: Re: invoice no CSPL/4188/19-20 RS.2360 Payment Detail
Attachment: Contract-CSPL418819-20 RS.2360.rar (contains "Contract-CSPL418819-20 RS.2360.exe")

NanoCore RAT C2:
masterwork.ydns.eu

Intelligence

File Origin

# of uploads :

# of downloads :

135

Origin country :

n/a

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/48447/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Sending a UDP request

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Launching a process

Creating a process with a hidden window

Deleting a recently created file

Unauthorized injection to a recently created process

Creating a file

Creating a file in the %AppData% subdirectories

DNS request

Connection attempt to an infection source

Enabling autorun by creating a file

Result

Threat name:

Nanocore

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/437676

Signature

.NET source code contains potential unpacker

Detected Nanocore Rat

Found malware configuration

Hides that the sample has been downloaded from the Internet (zone.identifier)

Injects a PE file into a foreign processes

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Sigma detected: NanoCore

Sigma detected: Scheduled temp file as task from temp location

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AntiVM_3

Yara detected Nanocore RAT

Behaviour

Behavior Graph:

Download SVG

Detection:

nanocore

Link:

https://mwdb.cert.pl/sample/4b09a7fa4d80c792d50d5d81b9ffdd5a1511ae05958cceb464fa44f9cbbba347/

Threat name:

ByteCode-MSIL.Spyware.Vebzenpak

Status:

Malicious

First seen:

2020-08-18 17:09:09 UTC

AV detection:

23 of 29 (79.31%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=jme2p6snqddzfvinlwa3t765likrdlqfswgm5nde7jcpts53undq._file

Verdict:

malicious

Label(s):

nanocorerat

NanoCore

263573ece93d13d69ed99ea6be5715ca5b15e1877ed09a274ca9cf55f4d16a22

NanoCore

673aa6ede02270b33f4a7058ec4e31eabd688ca4c75037ed4a7f92470a42a271

NanoCore

7cc4e45a2448e81c638cf0a84c269d7d926135647f95d318279429587d462e9a

NanoCore

8ae81522b85b942557d654bd85f719d2a8b539106e787c451f0d2856effc6ca4

NanoCore

ab79b2c6cca235d1b6a2bfdc550a15497c03d193d622feaa2e48c3006ef7c0b8

NanoCore

af27bd7180ad756460e32f2ae56db7cbdc8a79e73a36b261a96f803e5b051fd5

NanoCore

b502f774e9192f77aa713347f2747b67df5a473be721226bf0b2d98bdff8a835

NanoCore

c9522b2123a5c1d678125fecafc722f82d46c099f6c1cbcca6b95c2911130927

NanoCore

f749fcdcc06750ec8e3839b52ddd13e9a2023673da83aefe1c13439e1351fab5

NanoCore

+ 1'198 additional samples on MalwareBazaar

Result

Malware family:

nanocore

Score:

10/10

Tags:

evasion trojan keylogger stealer spyware family:nanocore

Link:

https://tria.ge/reports/200819-jwrcexnh9x/

Behaviour

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Checks whether UAC is enabled

NanoCore

Malware Config

C2 Extraction:

masterwork.ydns.eu:2310

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Kryptik

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/4b09a7fa4d80c792d50d5d81b9ffdd5a1511ae05958cceb464fa44f9cbbba347

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/