MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2b8a102443d6ed4c84471a54f058f24f5f55485bba73ebd785fdce294e337110. 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 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2b8a102443d6ed4c84471a54f058f24f5f55485bba73ebd785fdce294e337110
SHA3-384 hash: bf23b82e75e4a55b5dc8b7c7a8ebf62c04bc6790163a3304c349c1822eaa88cfe8667e932083359c6532bd1c923bf51a
SHA1 hash: 1e688b724ff9b21bb7b52ba6136551bee9f7ad46
MD5 hash: 865fc551f557b7662973f8f889c49eca
humanhash: october-neptune-vermont-march
File name:Invoice Payment_PDF.vbs
Download: download sample
Signature NanoCore
Create hunting rule
File size:1'273'402 bytes
First seen:2021-05-26 17:39:53 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 24576:eUtVyeFLZq1zwliuBLwi4uWxFqv9HeF0V8X/exFbBzySiBhNwPWoEz:riz0LwUv8GPIhNwPbW
Threatray 7'280 similar samples on MalwareBazaar
TLSH F2452332D55BBCE52FBFB91070C93E011E14766B83B4F695FB420D9128F6680CE2B999
Reporter abuse_ch
Tags:NanoCore RAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
226
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV3
Create hunting rule
Link:
https://www.capesandbox.com/analysis/162543/
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
Details
Base64 Encoded URL
Detected an ANSI or UNICODE http:// or https:// base64 encoded URL prefix.
Result
Threat name:
Nanocore AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/792778
Signature
.NET source code contains potential unpacker
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Detected Nanocore Rat
Found evasive API chain (trying to detect sleep duration tampering with parallel thread)
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
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 AgentTesla
Yara detected AntiVM3
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 425175 Sample: Invoice Payment_PDF.vbs Startdate: 26/05/2021 Architecture: WINDOWS Score: 100 48 sys2021.linkpc.net 2->48 58 Found malware configuration 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 Multi AV Scanner detection for submitted file 2->62 64 10 other signatures 2->64 9 wscript.exe 3 2->9         started        signatures3 process4 file5 40 C:\Users\user\AppData\Local\Temp\same.exe, PE32 9->40 dropped 68 Benign windows process drops PE files 9->68 70 VBScript performs obfuscated calls to suspicious functions 9->70 13 same.exe 9 9->13         started        17 see.exe 8 9->17         started        signatures6 process7 file8 42 C:\Users\user\AppData\Roaming\uxxDhct.exe, PE32 13->42 dropped 44 C:\Users\user\AppData\Local\...\tmpC436.tmp, XML 13->44 dropped 72 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 13->72 74 Machine Learning detection for dropped file 13->74 76 Uses schtasks.exe or at.exe to add and modify task schedules 13->76 19 same.exe 8 13->19         started        24 schtasks.exe 1 13->24         started        26 same.exe 13->26         started        28 same.exe 13->28         started        46 C:\Users\user\AppData\...\sHexVdpodPVRjw.exe, PE32 17->46 dropped 78 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 17->78 80 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 17->80 82 Injects a PE file into a foreign processes 17->82 84 Found evasive API chain (trying to detect sleep duration tampering with parallel thread) 17->84 30 see.exe 4 17->30         started        32 schtasks.exe 1 17->32         started        signatures9 process10 dnsIp11 50 sys2021.linkpc.net 51.178.229.162, 11940, 49758, 49759 OVHFR France 19->50 52 191.96.25.26, 11940, 49766, 49767 AS40676US Chile 19->52 38 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 19->38 dropped 66 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->66 34 conhost.exe 24->34         started        54 jetport-aero.com 217.182.175.206, 49777, 49780, 587 OVHFR France 30->54 56 mail.jetport-aero.com 30->56 36 conhost.exe 32->36         started        file12 signatures13 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2b8a102443d6ed4c84471a54f058f24f5f55485bba73ebd785fdce294e337110/
Threat name:
Script-WScript.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-05-26 17:40:15 UTC
AV detection:
12 of 47 (25.53%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=fofbajcd23wuzbchdjkpawhsj5pvksc3xjz6xv4f7xhcstrtoeia._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
3d8811d64e17d5ea06d0edae6163b90b2400d06d9afa60ae689d6fe9232bca86
NanoCore
4d394ed696ee7fb3d53a7b064c53f2157b28d9f192de912fe311dd284845e4c9
NanoCore
52b5f2f95b1200b20a6f3adfcb93c6f87713155f83176dede353ee158c7c1b63
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8551c05301b50a17763637cca7f291a6b779c82f16275f734e793f6a0e7e1a17
NanoCore
9f96527c9f839559485e89c5c5ff8f95708035fd55c9fac0c2edf3764224d860
NanoCore
cce5d9e4fd5ca9142510f3b21d0a73906171e90a815520985687dde13b6e643d
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e11f59ce9dae9fcff7ff4c8d3d119dd663a1918d084f8cda7b30c474cd141642
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e29e9d9beb5ce8187decf038cdc0b1d3102b4cfe43715a3b4f934098a943ebed
NanoCore
e9c3fc00ddb08ef196d05b56ce0c83c04381de42e8777e902e3e9c7afe4a9f11
NanoCore
f29b0b35d584de9410f3ffe75e8e4dbc6d90ecbc6f2c4d9382d8faf33e88d80b
NanoCore
+ 7'270 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:nanocore evasion keylogger spyware stealer trojan
Link:
https://tria.ge/reports/210526-91qn2welc6/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: SetClipboardViewer
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
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
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Executes dropped EXE
Looks for VMWare Tools registry key
AgentTesla Payload
Looks for VirtualBox Guest Additions in registry
AgentTesla
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/2b8a102443d6ed4c84471a54f058f24f5f55485bba73ebd785fdce294e337110

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_AgentTesla_20200929
Create hunting rule
Author:abuse.ch
Description:Detects AgentTesla PE
Rule name:ach_NanoCore
Create hunting rule
Author:abuse.ch
Rule name:MALWARE_Win_AgentTeslaV3
Create hunting rule
Author:ditekSHen
Description:AgentTeslaV3 infostealer payload
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_agent_tesla_v1
Create hunting rule
Author:Johannes Bader @viql
Description:detects Agent Tesla
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

Visual Basic Script (vbs) vbs 2b8a102443d6ed4c84471a54f058f24f5f55485bba73ebd785fdce294e337110

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/162543/

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