MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 503b445570a93a7cb69b2d5c17256274a5d8f2086b113229edbc1183f341391c. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 503b445570a93a7cb69b2d5c17256274a5d8f2086b113229edbc1183f341391c
SHA3-384 hash: 245f253057db433d4597588f65fbb0135cdd5ae9178fcb08f5239091e264a34056e936fcfb05b2bf7e80dbc345b2caf6
SHA1 hash: 5eb81dce4e2c75d9d70593abbad8ed3937c44378
MD5 hash: 4946bb30cda28a17bf7bf7db7c575512
humanhash: uncle-leopard-undress-glucose
File name:Doc_43795379326436.PDF.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:685'056 bytes
First seen:2020-08-15 10:01:14 UTC
Last seen:2020-08-15 10:34:51 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:aNe+fHbOivhRwb7NdNgYo1/YTom08V4qgO6CQjUodkp:ao+TgbpdKHtYNV4qgO6C7odk
Threatray 1'090 similar samples on MalwareBazaar
TLSH 0FE4E003660C97EAE89DAB3D1235C97093E1ED26E315ED2CBDD57CCB3977A629350802
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: cloud-1bdf0b.managed-vps.net
Sending IP: 78.128.43.156
From: Dae-Jun Kim <info@brtglobalscrap.com>
Subject: Re: Order
Attachment: Doc_43795379326436.PDF.7s (contains "Doc_43795379326436.PDF.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/46299/
Detection(s):
SecuriteInfo.com.Generic.mg.4946bb30cda28a17.13628.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
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/431972
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)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Initial sample is a PE file and has a suspicious name
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
Sigma detected: Suspicious Double Extension
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
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: 268406 Sample: Doc_43795379326436.PDF.exe Startdate: 17/08/2020 Architecture: WINDOWS Score: 100 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Icon mismatch, binary includes an icon from a different legit application in order to fool users 2->52 54 13 other signatures 2->54 7 Doc_43795379326436.PDF.exe 7 2->7         started        11 dhcpmon.exe 5 2->11         started        process3 file4 30 C:\Users\user\AppData\Roaming\kjQTHwzAp.exe, PE32 7->30 dropped 32 C:\Users\...\kjQTHwzAp.exe:Zone.Identifier, ASCII 7->32 dropped 34 C:\Users\user\AppData\Local\...\tmpC880.tmp, XML 7->34 dropped 36 C:\Users\...\Doc_43795379326436.PDF.exe.log, ASCII 7->36 dropped 56 Injects a PE file into a foreign processes 7->56 13 Doc_43795379326436.PDF.exe 1 9 7->13         started        18 schtasks.exe 1 7->18         started        20 schtasks.exe 1 11->20         started        22 dhcpmon.exe 2 11->22         started        24 dhcpmon.exe 11->24         started        signatures5 process6 dnsIp7 44 194.5.97.7, 21600, 49738, 49739 DANILENKODE Netherlands 13->44 46 127.0.0.1 unknown unknown 13->46 38 C:\Program Files (x86)\...\dhcpmon.exe, PE32 13->38 dropped 40 C:\Users\user\AppData\Roaming\...\run.dat, PGP\011Secret 13->40 dropped 42 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 13->42 dropped 58 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->58 26 conhost.exe 18->26         started        28 conhost.exe 20->28         started        file8 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/503b445570a93a7cb69b2d5c17256274a5d8f2086b113229edbc1183f341391c/
Threat name:
ByteCode-MSIL.Trojan.CryptInject
Create hunting rule
Status:
Malicious
First seen:
2020-08-15 08:02:27 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ka5uivlqve5hznu3fvobojlcoss5r4qinmitekpnxqiyh42bheoa._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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d11f8cd2987a718cc9d0bd9de289ee8d90555115cb9d03fdc8f0b930898e4a75
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e29e9d9beb5ce8187decf038cdc0b1d3102b4cfe43715a3b4f934098a943ebed
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e41e433626e9dbf6c3a56c29c9dc60adfa53f71cd1c3bc10d682a1b2239c576d
NanoCore
+ 1'080 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/200815-f1zcnmxf4x/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
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:
194.5.97.7:21600
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/503b445570a93a7cb69b2d5c17256274a5d8f2086b113229edbc1183f341391c

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

zip af78c571f5ae340994d3255d16e16c37fdba61b8a64577a05d407ef0868184b3

NanoCore

Executable exe 503b445570a93a7cb69b2d5c17256274a5d8f2086b113229edbc1183f341391c

(this sample)

  
Dropped by
MD5 90f466af2ee4d760d8e601a964e2db88
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/46299/
  
Dropped by
SHA256 af78c571f5ae340994d3255d16e16c37fdba61b8a64577a05d407ef0868184b3

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