MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 55357cf739afcec5d05df3b2b63b50ac2f3fc09f5d6abd2065656a62c90145af. 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: | 55357cf739afcec5d05df3b2b63b50ac2f3fc09f5d6abd2065656a62c90145af |
|---|---|
| SHA3-384 hash: | 798e576b6998d099b87d59b40686cfd7ee71c559e817b80a651606db37816930b52eb27c3ed1d70bfa110f40664eaa2a |
| SHA1 hash: | 9cc9976eff7b8bdafb7990d14de72a481703ceb1 |
| MD5 hash: | e48ae3c3e58006ec47ac08b4213583d2 |
| humanhash: | lamp-rugby-uncle-colorado |
| File name: | aXfA69gLbsTjxGu.exe |
| Download: | download sample |
| Signature | NanoCore |
| File size: | 778'240 bytes |
| First seen: | 2020-07-30 08:52:53 UTC |
| Last seen: | 2020-07-30 10:00:55 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:jERmOqPDDAIsENR4N4U12xVB4pN5Egzr/v+YHIH5KWB+UcD6:wwxPDjsunZVBc5Eg/v+YoZR |
| Threatray | 1'708 similar samples on MalwareBazaar |
| TLSH | 9CF4BF047B80D50EC65B8E3AC6944A10D9B8ED9A4A1BE3C774C377EF1CFE35AA6015B1 |
| Reporter |  abuse_ch |
| Tags: | exe NanoCore nVpn RAT |
abuse_ch
Malspam distributing NanoCore:HELO: outsmtp01.sadecehosting.com
Sending IP: 77.92.152.35
From: Ali Hamood Al-Marhubi <ch3rrysamuel@y>
Subject: Confirm order PO#290720
Attachment: Official PO003020.ARJ (contains "aXfA69gLbsTjxGu.exe")
RemcosRAT C2:
79.134.225.71:1985
Hosted on nVpn:
% Information related to '79.134.225.0 - 79.134.225.127'
% Abuse contact for '79.134.225.0 - 79.134.225.127' is 'abuse@privacyfirst.sh'
inetnum: 79.134.225.0 - 79.134.225.127
netname: PRIVACYFIRST-EU
country: EU
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.
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
status: ASSIGNED PA
mnt-by: AF15-MNT
org: ORG-TPP6-RIPE
created: 2020-07-14T15:26:02Z
last-modified: 2020-07-14T15:31:06Z
source: RIPE
Intelligence
File Origin
# of uploads :
2
# of downloads :
84
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Creating a file
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Using the Windows Management Instrumentation requests
Forced shutdown of a system process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending a TCP request to an infection source
Unauthorized injection to a system process
Result
Threat name:
NanoCore
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Hides that the sample has been downloaded from the Internet (zone.identifier)
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:
Detection:
nanocore
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Status:
Malicious
First seen:
2020-07-30 08:54:11 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'698 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Score:
10/10
Tags:
evasion trojan keylogger stealer spyware family:nanocore persistence
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
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:
79.134.225.71:1985
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
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.
f89a5ee2c700720d0debf126a13096b4
Dropped by
MD5 f89a5ee2c700720d0debf126a13096b4
Delivery method
Distributed via e-mail attachment
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