MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 23143dfb44c72eeec3b05a6d3dde2c4245adcb7db200c00f7700257830b4bcc4. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 23143dfb44c72eeec3b05a6d3dde2c4245adcb7db200c00f7700257830b4bcc4
SHA3-384 hash: 273319b418a8b051631a37dffca13e274cb9084f064f3107b87f3715ac16ec7eb32c71f1a045efd00d20c977ca5791c0
SHA1 hash: 2dc93e968f7560f709c8a3c115e305194c8fe87d
MD5 hash: 1e6c98943038ee098cb0203a0d8231ef
humanhash: potato-sixteen-cat-summer
File name:U85C0hFjVrtaLLO.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:862'720 bytes
First seen:2020-08-04 14:46:36 UTC
Last seen:2020-08-04 15:56:37 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:kVMVKHcPgYxmOE+2Do4pPeRH89fQCsduuUumcuAtUb+xVfJWLDVw:lIYxPeVZlGp6S9n0fV
Threatray 1'119 similar samples on MalwareBazaar
TLSH 4E05AEC1F1809E50D86A4E3B4C3349914B33AC6BEF42D607349CB6596BF72966A35F83
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: TT ACH202093880 LLC paid
Attachment: ACH Deposit.img (contains "U85C0hFjVrtaLLO.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 :
107
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/38794/
Detection(s):
SecuriteInfo.com.CIL.HeapOverride.Heur.3985.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
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
Creating a file in the %temp% directory
Launching a process
Deleting a recently created file
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/409632
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
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: 257083 Sample: U85C0hFjVrtaLLO.exe Startdate: 04/08/2020 Architecture: WINDOWS Score: 100 62 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->62 64 Found malware configuration 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 10 other signatures 2->68 9 U85C0hFjVrtaLLO.exe 1 2->9         started        13 U85C0hFjVrtaLLO.exe 2->13         started        15 dhcpmon.exe 1 2->15         started        17 dhcpmon.exe 2->17         started        process3 file4 58 C:\Users\user\...\U85C0hFjVrtaLLO.exe.log, ASCII 9->58 dropped 72 Injects a PE file into a foreign processes 9->72 19 U85C0hFjVrtaLLO.exe 1 15 9->19         started        24 U85C0hFjVrtaLLO.exe 9->24         started        26 U85C0hFjVrtaLLO.exe 2 13->26         started        28 U85C0hFjVrtaLLO.exe 13->28         started        30 U85C0hFjVrtaLLO.exe 13->30         started        32 U85C0hFjVrtaLLO.exe 13->32         started        34 dhcpmon.exe 2 15->34         started        36 dhcpmon.exe 15->36         started        38 2 other processes 17->38 signatures5 process6 dnsIp7 60 185.165.153.236, 49717, 9083 DAVID_CRAIGGG Netherlands 19->60 50 C:\Program Files (x86)\...\dhcpmon.exe, PE32 19->50 dropped 52 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 19->52 dropped 54 C:\Users\user\AppData\Local\...\tmp3824.tmp, XML 19->54 dropped 56 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 19->56 dropped 70 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->70 40 schtasks.exe 1 19->40         started        42 schtasks.exe 1 19->42         started        file8 signatures9 process10 process11 44 conhost.exe 40->44         started        46 conhost.exe 42->46         started        process12 48 conhost.exe 44->48         started       
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/23143dfb44c72eeec3b05a6d3dde2c4245adcb7db200c00f7700257830b4bcc4/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-04 14:48:07 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=emkd362ey4xo5q5qljwt3xrmijc23s35wiamad3xaasxqmfuxtca._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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cff3d5fedc8fdab09a7b27524a02503b53f4f7378ab0a09219701d3b9c3e68f4
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ed544c300a04ddf77c6537f3cb78177f12c9a23e62d06189a19eee966caf9631
NanoCore
+ 1'109 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
evasion trojan keylogger stealer spyware family:nanocore persistence
Link:
https://tria.ge/reports/200804-ctzrlnpr4s/
Behaviour
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
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:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/23143dfb44c72eeec3b05a6d3dde2c4245adcb7db200c00f7700257830b4bcc4

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

img 477e309fab0a09cc96a1d3ea130cffe0d021d78cecfa9c7501d4c06cba93b040

NanoCore

Executable exe 23143dfb44c72eeec3b05a6d3dde2c4245adcb7db200c00f7700257830b4bcc4

(this sample)

  
Dropped by
MD5 707ccb7024942d7acec18f514e0cd612
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/38794/
  
Dropped by
SHA256 477e309fab0a09cc96a1d3ea130cffe0d021d78cecfa9c7501d4c06cba93b040

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