MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fbc5a1e5f8a02c644cf207d40885c7973dc7e4809b97f676927da3e13e17ed1f. 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 19 File information Comments
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SHA256 hash: fbc5a1e5f8a02c644cf207d40885c7973dc7e4809b97f676927da3e13e17ed1f
SHA3-384 hash: dc862a646f49700b31fff2d63af4b9f3265528883f4187c1ac025cffc2b4fde8c1de7ccde9a0bc8e7b55dffbfbeed0e4
SHA1 hash: ca29113b7607ecb7d9a65d8285d7d36f367b1cd0
MD5 hash: fcf52f96d96c68788ffe13fcccd4c89c
humanhash: jig-pizza-batman-lamp
File name:Invoice No F1019855_PDF.vbs
Download: download sample
Signature NanoCore
Create hunting rule
File size:2'072'856 bytes
First seen:2021-05-11 17:02:34 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 24576:b+Ve64mPEkJd1XpdQ5YImc4yFNkVQtJpE5821c5+D5PTxrpWhFcW1Gi/zQSov0FF:bIz4ToQsx46J/0
Threatray 1 similar samples on MalwareBazaar
TLSH FAA5B472D305F3DA7C3DB4868385B1EF6C606B02A5744F34F59F7A4102E6AA9DA3124E
Reporter abuse_ch
Tags:NanoCore RAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
251
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AsyncRat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/155173/
Detection(s):
SecuriteInfo.com.Generic-EXE.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.Base64EXE-2.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Result
Verdict:
MALICIOUS
Result
Threat name:
Nanocore AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/778933
Signature
.NET source code contains potential unpacker
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
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)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: NanoCore
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
VBScript performs obfuscated calls to suspicious functions
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 411334 Sample: Invoice No F1019855_PDF.vbs Startdate: 11/05/2021 Architecture: WINDOWS Score: 100 46 sys2021.linkpc.net 2->46 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 9 other signatures 2->58 9 wscript.exe 3 2->9         started        signatures3 process4 file5 36 C:\Users\user\AppData\Local\Temp\name.exe, PE32 9->36 dropped 38 C:\Users\user\AppData\Local\Temp\file.exe, PE32 9->38 dropped 62 Benign windows process drops PE files 9->62 64 VBScript performs obfuscated calls to suspicious functions 9->64 13 name.exe 6 9->13         started        17 file.exe 6 9->17         started        signatures6 process7 file8 40 C:\Users\user\AppData\Roaming\LiydYED.exe, PE32 13->40 dropped 66 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 13->66 68 Injects a PE file into a foreign processes 13->68 19 name.exe 8 13->19         started        24 schtasks.exe 1 13->24         started        42 C:\Users\user\AppData\Local\Temp\tmpAD9.tmp, XML 17->42 dropped 44 C:\Users\user\AppData\Roaming\JkeJLChUI.exe, PE32 17->44 dropped 70 Uses schtasks.exe or at.exe to add and modify task schedules 17->70 26 file.exe 11 2 17->26         started        28 schtasks.exe 1 17->28         started        signatures9 process10 dnsIp11 48 sys2021.linkpc.net 87.98.245.48, 10090, 11940, 49725 OVHFR France 19->48 50 191.96.25.26, 11940, 49736, 49739 AS40676US Chile 19->50 34 C:\Users\user\AppData\Roaming\...\run.dat, data 19->34 dropped 60 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->60 30 conhost.exe 24->30         started        32 conhost.exe 28->32         started        file12 signatures13 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fbc5a1e5f8a02c644cf207d40885c7973dc7e4809b97f676927da3e13e17ed1f/
Threat name:
Script-WScript.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-05-11 17:03:14 UTC
AV detection:
10 of 47 (21.28%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=7pc2dzpyuawgithsa7karbohs464pzeatol7m5uspwr6cpqx5upq._file
Verdict:
unknown
Similar samples:
d268733d386f2c72e5e5da2bdd5192158c2e52d79df04c4aa91ab3d04c6051e5
NanoCore
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat family:nanocore evasion keylogger rat spyware stealer trojan
Link:
https://tria.ge/reports/210511-gyha7m9322/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Maps connected drives based on registry
Checks BIOS information in registry
Loads dropped DLL
Executes dropped EXE
Looks for VMWare Tools registry key
Async RAT payload
Looks for VirtualBox Guest Additions in registry
AsyncRat
Contains code to disable Windows Defender
NanoCore
Malware Config
C2 Extraction:
sys2021.linkpc.net:11940
191.96.25.26:11940
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/fbc5a1e5f8a02c644cf207d40885c7973dc7e4809b97f676927da3e13e17ed1f

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:asyncrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:Choice_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
Rule name:INDICATOR_SUSPICIOUS_DisableWinDefender
Create hunting rule
Author:ditekSHen
Description:Detects executables containing artifcats associated with disabling Widnows Defender
Rule name:INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse
Create hunting rule
Author:ditekSHen
Description:Detects file containing reversed ASEP Autorun registry keys
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:MALWARE_Win_AsyncRAT
Create hunting rule
Author:ditekSHen
Description:Detects AsyncRAT
Rule name:Nanocore
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Nanocore in memory
Reference:internal research
Rule name:nanocore_rat
Create hunting rule
Author:jeFF0Falltrades
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:pe_imphash
Create hunting rule
Rule name:Reverse_text_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Reverse text detected
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT
Rule name:win_asyncrat_w0
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
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.

Cape
Cape
https://www.capesandbox.com/analysis/155173/

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