MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9. 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: 10


Intelligence 10 IOCs YARA 4 File information Comments
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SHA256 hash: a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9
SHA3-384 hash: b93ec03aa191b9c7cb57936eb4ce5d2119d87263720a2a6edee66a5d0feb346be0d08712ebb5c173145570fa7607b6ea
SHA1 hash: 5facf679757bfea5efc5dd346ea3da2ebe68b390
MD5 hash: 41b2f50529b8d5660bf871ff1fd3d6c6
humanhash: sierra-nevada-sodium-twenty
File name:Bank Report.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:45'568 bytes
First seen:2022-03-04 19:04:14 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'818 x AgentTesla, 19'741 x Formbook, 12'286 x SnakeKeylogger)
ssdeep 768:W4xCZZA0fdWJUsQubY224juthGdLr96gLZmjzYnP7RhRvxKq2Y1rqI4:lGZJfGUsQubrvSo4iKEFXvxKqHsp
Threatray 9'574 similar samples on MalwareBazaar
TLSH T12F235BC2F3A9A190ED9F46399437DF004BA6FF12B88616197596334B4F73382D66321B
File icon (PE):PE icon
dhash icon e0e4a2aaa4b8a888 (10 x DarkWatchman, 5 x SnakeKeylogger, 5 x Formbook)
Reporter GovCERT_CH
Tags:exe NanoCore

Intelligence

File Origin
# of uploads :
1
# of downloads :
299
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/247414/
Detection(s):
SecuriteInfo.com.Trojan.Downloader.10124.UNOFFICIAL
Create hunting rule

Win.Trojan.WPDownloader-9939915-0
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Running batch commands
DNS request
Sending a custom TCP request
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/bcf5c40e-0b86-49d3-a4d4-afc912845637
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/950949
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Detected Nanocore Rat
Encrypted powershell cmdline option found
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
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: NanoCore
Sigma detected: Suspicious Add Scheduled Task From User AppData Temp
Sigma detected: Suspicius Schtasks From Env Var Folder
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Generic Downloader
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 583426 Sample: Bank Report.exe Startdate: 04/03/2022 Architecture: WINDOWS Score: 100 59 papakamzy.ddns.net 2->59 61 store-images.s-microsoft.com 2->61 67 Multi AV Scanner detection for domain / URL 2->67 69 Found malware configuration 2->69 71 Malicious sample detected (through community Yara rule) 2->71 73 17 other signatures 2->73 9 Bank Report.exe 16 6 2->9         started        14 RegAsm.exe 2 2->14         started        16 dhcpmon.exe 2 2->16         started        18 dhcpmon.exe 1 2->18         started        signatures3 process4 dnsIp5 65 cdn.discordapp.com 162.159.133.233, 443, 49745 CLOUDFLARENETUS United States 9->65 53 C:\Users\user\AppData\Local\bin.exe, PE32 9->53 dropped 55 C:\Users\user\...\bin.exe:Zone.Identifier, ASCII 9->55 dropped 57 C:\Users\user\AppData\...\Bank Report.exe.log, ASCII 9->57 dropped 79 Creates an undocumented autostart registry key 9->79 81 Encrypted powershell cmdline option found 9->81 83 Writes to foreign memory regions 9->83 85 2 other signatures 9->85 20 RegAsm.exe 1 11 9->20         started        25 powershell.exe 9 9->25         started        27 conhost.exe 14->27         started        29 conhost.exe 16->29         started        31 conhost.exe 18->31         started        file6 signatures7 process8 dnsIp9 63 papakamzy.ddns.net 188.241.80.20, 49785, 49787, 49789 SAFEGRIDRO Romania 20->63 47 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 20->47 dropped 49 C:\Users\user\AppData\Local\...\tmp566C.tmp, XML 20->49 dropped 51 C:\Program Files (x86)\...\dhcpmon.exe, PE32 20->51 dropped 75 Uses schtasks.exe or at.exe to add and modify task schedules 20->75 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->77 33 schtasks.exe 1 20->33         started        35 schtasks.exe 1 20->35         started        37 cmd.exe 1 25->37         started        39 conhost.exe 25->39         started        file10 signatures11 process12 process13 41 conhost.exe 33->41         started        43 conhost.exe 35->43         started        45 timeout.exe 1 37->45         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-03-02 02:51:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
22 of 27 (81.48%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ui35x6bk7ppx36vyx5x7qtzksvb5i2u5a6krqj6nkifkl3bkztmq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
074a43f2b2bcfe46a0ad168e710ed220c63fa8806771a4e2bd7f18bef315d797
NanoCore
195e0df7c1b02f419fa8e1a915876382ee68b372e01b60df24b76c8c39315f7a
NanoCore
47738787dc09377ee3517c66950e1a6c93107d71a591c9b9bdc4f915d13a7c75
NanoCore
4f97e52ca46091f7651cfebc671b00a7c8c1abd92e2b532eb141c0266eecb2f0
NanoCore
9b9ccd5087d13d61df3b80db218b7d9f7f7d017b59899a9cb179b1eb36878976
NanoCore
c5dd6c32abf4c4db59f72a10a5e11830c4f3c210241bafea02e57947569fc13e
NanoCore
+ 9'564 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/220304-xrhz3shcen/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Modifies WinLogon for persistence
NanoCore
Malware Config
C2 Extraction:
papakamzy.ddns.net:7600
Unpacked files
SH256 hash:
a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9
MD5 hash:
41b2f50529b8d5660bf871ff1fd3d6c6
SHA1 hash:
5facf679757bfea5efc5dd346ea3da2ebe68b390
Link:
https://www.unpac.me/results/fbdcd490-ae5c-4041-ac81-1cc434d92b7c/
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a237dbf82afb/report/overview.html
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/a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9

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:INDICATOR_SUSPICIOUS_EXE_DiscordURL
Create hunting rule
Author:ditekSHen
Description:Detects executables Discord URL observed in first stage droppers
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_PE_Discord_Attachment_Oct21_1
Create hunting rule
Author:Florian Roth
Description:Detects suspicious executable with reference to a Discord attachment (often used for malware hosting on a legitimate FQDN)
Reference:Internal Research

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

NanoCore

Executable exe a237dbf82afbdf7dfab8bf6ff84f2a9543d46a9d07951827cd520aa5ec2accd9

(this sample)

  
Dropped by
nanocore
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/247414/

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