MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6eb10ca3e8026756f417b8e04510f768c28175817c73be8f21514dfb186d687f. 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: 8


Intelligence 8 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6eb10ca3e8026756f417b8e04510f768c28175817c73be8f21514dfb186d687f
SHA3-384 hash: d26ba3e5303876ce5255a95c55aff97f09b180dc3bbae8f2c1a106f44342f290e001897555f917492085356bed96dff6
SHA1 hash: fde1deda50894f033953d60489a4b7cf419f32ff
MD5 hash: 7722927e924e2784f1556197cbf99bcb
humanhash: papa-kilo-michigan-one
File name:yStGKbGE4eFcVMk.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:677'376 bytes
First seen:2020-08-04 06:24:28 UTC
Last seen:2020-08-04 06:44:50 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 12288:fMr1E2pcuIjflbdK2Uvubzf4BhWl08WYR0bKi8M9bfhNlZ96IafuN0QGhSO/:EEF5nIuff4b00EVi8ujlZwC0
Threatray 2'220 similar samples on MalwareBazaar
TLSH B1E4CE5C3BA0892AF55A0FBE9C7611039D34F80B692BF38F35E5116C487A79CAC41F66
Reporter abuse_ch
Tags:exe NanoCore nVpn RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: server.amcham.or.id
Sending IP: 172.104.32.98
From: no-reply@amcham.or.id
Subject: Transactions attached is on hold
Attachment: Receipt.img (contains "yStGKbGE4eFcVMk.exe")

NanoCore RAT C2:
185.165.153.236:9083

Hosted on nVpn:

% Information related to '185.165.153.0 - 185.165.153.255'

% Abuse contact for '185.165.153.0 - 185.165.153.255' is 'abuse@privacyfirst.sh'

inetnum: 185.165.153.0 - 185.165.153.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-EU2
country: EU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2019-10-18T12:14:26Z
last-modified: 2020-07-28T20:37:37Z
source: RIPE

Intelligence

File Origin
# of uploads :
2
# of downloads :
90
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/38163/
Detection(s):
SecuriteInfo.com.Variant.MSILPerseus.227240.10421.10872.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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
Creating a file in the Program Files subdirectories
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/408621
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Malicious sample detected (through community Yara rule)
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 256545 Sample: yStGKbGE4eFcVMk.exe Startdate: 04/08/2020 Architecture: WINDOWS Score: 100 53 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->53 55 Found malware configuration 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 9 other signatures 2->59 8 yStGKbGE4eFcVMk.exe 7 2->8         started        12 dhcpmon.exe 3 2->12         started        14 yStGKbGE4eFcVMk.exe 2 2->14         started        16 dhcpmon.exe 2->16         started        process3 file4 47 C:\Users\user\AppData\Local\...\tmpBEE0.tmp, XML 8->47 dropped 49 C:\Users\user\AppData\...\&startupname&.exe, PE32 8->49 dropped 63 Injects a PE file into a foreign processes 8->63 65 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 8->65 18 yStGKbGE4eFcVMk.exe 1 16 8->18         started        23 schtasks.exe 1 8->23         started        25 dhcpmon.exe 12->25         started        27 yStGKbGE4eFcVMk.exe 14->27         started        29 dhcpmon.exe 16->29         started        signatures5 process6 dnsIp7 51 185.165.153.236, 49745, 9083 DAVID_CRAIGGG Netherlands 18->51 41 C:\Program Files (x86)\...\dhcpmon.exe, PE32 18->41 dropped 43 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 18->43 dropped 45 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 18->45 dropped 61 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->61 31 schtasks.exe 1 18->31         started        33 schtasks.exe 1 18->33         started        35 conhost.exe 23->35         started        file8 signatures9 process10 process11 37 conhost.exe 31->37         started        39 conhost.exe 33->39         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6eb10ca3e8026756f417b8e04510f768c28175817c73be8f21514dfb186d687f/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-04 06:26:07 UTC
AV detection:
21 of 29 (72.41%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=n2yqzi7iajtvn5axxdqekehxndbic5mbprz35dzbkfg7wgdnnb7q._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
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NanoCore
2a828598f4c66e85305d93ce56bad4c27b7bd6a446eb9b9cec27d961b2591b95
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832782af8ac7a682f48d5a00f549a5474d6b2524386c8826eae41982db8597c3
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8c71aca391fbd24fb5400cbc0cea7bfc424dfac861cbfebbac25393e8b21bbf4
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f036e2aa7615446d2cb3ab689b13aac4055bf2cb8b19b0999db08d7052a80bf1
NanoCore
f94fdbaf430c51b2d97e75c378a7e6cf66fbbe6984cc9348b9369a435fdaa2b1
NanoCore
+ 2'210 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
persistence evasion trojan keylogger stealer spyware family:nanocore
Link:
https://tria.ge/reports/200804-974ser8qtn/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
NanoCore
Malware Config
C2 Extraction:
185.165.153.236:9083
godrich.duckdns.org:9083
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/6eb10ca3e8026756f417b8e04510f768c28175817c73be8f21514dfb186d687f

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:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
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

img b7166b77936bce0bd2b4d6402ca51452d084f5bfbbc7d63932bfdc92defd3cf6

NanoCore

Executable exe 6eb10ca3e8026756f417b8e04510f768c28175817c73be8f21514dfb186d687f

(this sample)

  
Dropped by
MD5 960a157561c06b66bf4c82df3c6f3ed0
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/38163/
  
Dropped by
SHA256 b7166b77936bce0bd2b4d6402ca51452d084f5bfbbc7d63932bfdc92defd3cf6

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