MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c59cec501a6e4d91587afa1e5582838965a61793c9d5d2f70ab4c53f55c05789. 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: 12

Intelligence 12 IOCs YARA 6 File information Comments

SHA256 hash:	c59cec501a6e4d91587afa1e5582838965a61793c9d5d2f70ab4c53f55c05789
SHA3-384 hash:	ff3b900d8aabafcbd070ad5865be9685bba9d247d48b690eaaaeccffcd13ccda250c36deb4c3435323a3cd333a1fb97c
SHA1 hash:	ef497cb26703c929e113c11aeee1a5ca01dfc19d
MD5 hash:	8bccf6466d765ac2a8f2fd39f0ca3b2a
humanhash:	fourteen-bulldog-low-avocado
File name:	silkOrder00110.pdf.exe
Download:	download sample
Signature	NanoCore Create hunting rule
File size:	776'704 bytes
First seen:	2021-01-18 18:42:16 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep	6144:QNAy3DF/5892Rfx7yUH+mff7BBTkNAo23KB2pTwcSn9vCfEvgoBzDuUx:YAyzF/B1rHpTkJ23d9ZSn9VtFDuUx
Threatray	152 similar samples on MalwareBazaar
TLSH	46F4BE03E24C8515C92439FD5C6B732CAE17CD87CB90EAC5775BBE1EA5B2FC05A88942
Reporter	abuse_ch
Tags:	exe NanoCore RAT

abuse_ch

Malspam distributing NanoCore:

HELO: silkrelo.com
Sending IP: 144.208.127.214
From: Jay Seo <jay.seo@silkrelo.com>
Subject: Silk Relo Korea Co., Ltd. Purchase order
Attachment: Silk Order 00110.pdf.rar (contains "silkOrder00110.pdf.exe")

NanoCore RAT C2:
185.162.88.26:20911

Intelligence

File Origin

# of uploads :

# of downloads :

219

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

silkOrder00110.pdf.exe

Verdict:

Malicious activity

Analysis date:

2021-01-18 19:08:19 UTC

Tags:

rat nanocore

Link:

https://app.any.run/tasks/7a5c9191-5703-494c-9e84-f376a2836e47

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

NanoCore

Link:

https://www.capesandbox.com/analysis/112682/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Sending a UDP request

Running batch commands

Launching a process

Creating a file in the %temp% directory

Creating a file in the %AppData% directory

Creating a process from a recently created file

Creating a file

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Unauthorized injection to a recently created process

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Result

Threat name:

Nanocore

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/584153

Signature

.NET source code contains potential unpacker

Allocates memory in foreign processes

C2 URLs / IPs found in malware configuration

Detected Nanocore Rat

Found malware configuration

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

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: NanoCore

Uses an obfuscated file name to hide its real file extension (double extension)

Uses dynamic DNS services

Writes to foreign memory regions

Yara detected Nanocore RAT

Behaviour

Behavior Graph:

Download SVG

Detection:

nanocore

Link:

https://mwdb.cert.pl/sample/c59cec501a6e4d91587afa1e5582838965a61793c9d5d2f70ab4c53f55c05789/

Threat name:

Win32.Trojan.Pwsx

Status:

Malicious

First seen:

2021-01-18 14:33:31 UTC

AV detection:

7 of 45 (15.56%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=ywooyua2nzgzcwd27ipflaudrfs2mf4tzhk5f5ykwtct6voak6eq._file

Verdict:

suspicious

Result

Malware family:

nanocore

Score:

10/10

Tags:

family:nanocore evasion keylogger persistence spyware stealer trojan

Link:

https://tria.ge/reports/210118-963gd5s17j/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Adds Run key to start application

Checks whether UAC is enabled

Loads dropped DLL

Executes dropped EXE

NanoCore

Malware Config

C2 Extraction:

185.162.88.26:20911
fenixalec.ddns.net:20911

Unpacked files

SH256 hash:

4f81e273da20c5b9835ce6ca57cc061d77764f9e3927bdb1505cb791bf50b046

MD5 hash:

29e19b5dce96140a8b90152b16bd44af

SHA1 hash:

4f3dc6eb876bb58f53966980a9c451a04ec17d8a

Link:

https://www.unpac.me/results/e053f5d9-16f2-4bfe-9420-b990889b7fc8/

SH256 hash:

4fbb56f5dc4e483df10bcd44d45bac4db5577be7ddf20a4e6c7957a5b271f0af

MD5 hash:

7f0eaa932643cecaa67e3cc6ed800ed6

SHA1 hash:

123360e62fb1d1e9e9f64b742cc2240041294752

Detections:

win_nanocore_w0

Link:

https://www.unpac.me/results/e053f5d9-16f2-4bfe-9420-b990889b7fc8/

Parent samples :
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SH256 hash:

49dc26861fffee2f6440e56a10b7086ea305d2f16bb9e27ba3e08b9893557f86

MD5 hash:

e732cd6decfed3503b4020899d5a56f9

SHA1 hash:

024c1bf147c698e92aae340bbee323601d02a787

Link:

https://www.unpac.me/results/e053f5d9-16f2-4bfe-9420-b990889b7fc8/

SH256 hash:

c59cec501a6e4d91587afa1e5582838965a61793c9d5d2f70ab4c53f55c05789

MD5 hash:

8bccf6466d765ac2a8f2fd39f0ca3b2a

SHA1 hash:

ef497cb26703c929e113c11aeee1a5ca01dfc19d

Link:

https://www.unpac.me/results/e053f5d9-16f2-4bfe-9420-b990889b7fc8/

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

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/c59cec501a6e4d91587afa1e5582838965a61793c9d5d2f70ab4c53f55c05789

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 Create hunting rule
Author:	jeFF0Falltrades

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/