MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6f8b5cad56d107434291b260c5483479d0ac1d02498d5bfad7468a02dc7fc19d. 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
| SHA256 hash: | 6f8b5cad56d107434291b260c5483479d0ac1d02498d5bfad7468a02dc7fc19d |
|---|---|
| SHA3-384 hash: | 60df2e7ccd0795b2db73fe61284cbbe41d6fcb1580109ea9ab89847d96c86821d0a47d2680f425a14cb355b177b64780 |
| SHA1 hash: | 1f168f5434fe908f1c45096f6413b87f6341e764 |
| MD5 hash: | c7a6ac1256af10196dc1adbe84abe700 |
| humanhash: | summer-september-apart-undress |
| File name: | Estado de cuenta.scr |
| Download: | download sample |
| Signature | NanoCore |
| File size: | 393'648 bytes |
| First seen: | 2020-08-13 14:38:45 UTC |
| Last seen: | 2020-08-13 15:54:44 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 6144:QS1FFkBGs5bc5tHBonRQ11OpP6xc0wYSqVqGGGGGGDGGGGGGgyFw674RoGGGGGGg:QS1zkkNtheQ6YA7Y |
| Threatray | 1'158 similar samples on MalwareBazaar |
| TLSH | 788406E2F6455C99EC1717F1193A9A6010736E6D59E4820C30BE7E6737B338324AAD8F |
| Reporter |  abuse_ch |
| Tags: | ESP geo NanoCore nVpn RAT scr |
abuse_ch
Malspam distributing NanoCore:HELO: mail.jaroma.com.ec
Sending IP: 186.5.88.211
From: recepcion.documentos@jaroma.com.ec
Subject: Estado de cuenta
Attachment: Estado de cuenta.img (contains "Estado de cuenta.scr")
NanoCore RAT C2:
jrandjcpa.org:6969 (194.5.98.205)
Pointing to nVpn:
% Information related to '194.5.98.0 - 194.5.98.255'
% Abuse contact for '194.5.98.0 - 194.5.98.255' is 'abuse@privacyfirst.sh'
inetnum: 194.5.98.0 - 194.5.98.255
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-EU6
country: EU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2019-04-26T16:42:54Z
last-modified: 2020-07-30T03:41:26Z
source: RIPE
Intelligence
File Origin
# of uploads :
2
# of downloads :
130
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Sending a UDP request
Creating a file
Running batch commands
Launching a process
Creating a file in the %AppData% subdirectories
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Result
Threat name:
Njrat
Detection:
malicious
Classification:
troj.evad
Score:
54 / 100
Signature
Creates an autostart registry key pointing to binary in C:\Windows
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Sigma detected: Add file from suspicious location to autostart registry
Tries to detect virtualization through RDTSC time measurements
Yara detected Njrat
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Status:
Malicious
First seen:
2020-08-13 14:40:14 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
nanocorerat
Similar samples:
+ 1'148 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
8/10
Tags:
agilenet persistence
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Suspicious use of SetThreadContext
Adds Run key to start application
Adds Run key to start application
Loads dropped DLL
Obfuscated with Agile.Net obfuscator
Loads dropped DLL
Obfuscated with Agile.Net obfuscator
Executes dropped EXE
Executes dropped EXE
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
0.70
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 |
|---|---|
| Author: | abuse.ch |
| Rule name: | Nanocore |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Nanocore in memory |
| Reference: | internal research |
| Rule name: | Nanocore_RAT_Feb18_1 |
|---|---|
| Author: | Florian Roth |
| Description: | Detects Nanocore RAT |
| Reference: | Internal Research - T2T |
| Rule name: | Nanocore_RAT_Gen_2 |
|---|---|
| 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 |
|---|---|
| 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
Delivery method
Distributed via e-mail attachment
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