MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0
SHA3-384 hash: d3ad2b2305eb65414c32ec34fa2f1d27a8ae9907ae93f1bf5c72bc3b672e95fb7cafb27f3953cf21d19a79b130c062bf
SHA1 hash: 82b2cedda3978ec8f0e3e9797e388f88f93903f5
MD5 hash: 6549762fa17b89e3d22029d6b528d5ff
humanhash: freddie-south-carolina-autumn
File name:Invoice-30042020.doc
Download: download sample
Signature NanoCore
Create hunting rule
File size:2'596'547 bytes
First seen:2021-02-03 07:18:23 UTC
Last seen:2021-02-03 08:29:32 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 24576:d9GZ4BSofTNaJdtGUpLAShyNemOKnjou0jV0k1W8iCfSGka3ea8TwcQ75oBqbwfD:D
TLSH 07C5BFF876047DE6267F576BDA96ACDC03B626239ACBA4CD806477C305A3375FE02805
Reporter abuse_ch
Tags:doc NanoCore


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: vm1780440.3ssd.had.wf.emregiyim.com
Sending IP: 45.87.2.164
From: Sameh Jaffan <ahmed.s@jaffangroup.com>
Subject: RE: Invoices
Attachment: Invoice-30042020.doc

Intelligence

File Origin
# of uploads :
2
# of downloads :
123
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Invoice-30042020.doc
Verdict:
Malicious activity
Analysis date:
2021-02-03 07:22:48 UTC
Tags:
exploit CVE-2017-11882 loader rat nanocore
Link:
https://app.any.run/tasks/7a23ea92-82e6-40a3-b375-4a8c8f81e8c5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.6322.28804.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.RTFSTR._EQUATION.200422.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
DNS request
Creating a file in the %AppData% directory
Running batch commands
Creating a process with a hidden window
Adding an access-denied ACE
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Creating a file in the %temp% directory
Deleting a recently created file
Connection attempt
Sending an HTTP GET request
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Creating a process from a recently created file
Sending an HTTP GET request to an infection source
Enabling autorun by creating a file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/597571
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to hide a thread from the debugger
Detected Nanocore Rat
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 347827 Sample: Invoice-30042020.doc Startdate: 03/02/2021 Architecture: WINDOWS Score: 100 66 Found malware configuration 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus detection for URL or domain 2->70 72 13 other signatures 2->72 8 EQNEDT32.EXE 1 2->8         started        13 taskeng.exe 1 2->13         started        15 WINWORD.EXE 336 19 2->15         started        17 EQNEDT32.EXE 2->17         started        process3 dnsIp4 62 sfghfsfjskdjkdfbvndcnfjskaklwrrfw.ydns.eu 46.183.220.125, 49167, 80 DATACLUBLV Latvia 8->62 52 C:\Users\user\AppData\Roaming\BYC.exe, PE32 8->52 dropped 82 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->82 19 BYC.exe 12 1 8->19         started        23 timeout.exe 8->23         started        25 BYC.exe 1 13->25         started        27 smtpsvc.exe 12 1 13->27         started        file5 signatures6 process7 dnsIp8 60 193.239.147.103, 49168, 49170, 49171 DEDIPATH-LLCUS Brunei Darussalam 19->60 74 Multi AV Scanner detection for dropped file 19->74 76 Hides threads from debuggers 19->76 78 Injects a PE file into a foreign processes 19->78 80 Contains functionality to hide a thread from the debugger 19->80 29 BYC.exe 1 9 19->29         started        34 cmd.exe 19->34         started        36 cmd.exe 25->36         started        38 BYC.exe 25->38         started        40 cmd.exe 27->40         started        42 smtpsvc.exe 27->42         started        signatures9 process10 dnsIp11 64 hsjbvxnzmk12.myftp.biz 178.170.146.91, 2028 M247GB Netherlands 29->64 54 C:\Program Files (x86)\...\smtpsvc.exe, PE32 29->54 dropped 56 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 29->56 dropped 58 C:\Users\user\AppData\Local\...\tmpC8DB.tmp, XML 29->58 dropped 84 Hides that the sample has been downloaded from the Internet (zone.identifier) 29->84 44 schtasks.exe 29->44         started        46 schtasks.exe 29->46         started        48 timeout.exe 34->48         started        50 timeout.exe 36->50         started        file12 signatures13 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-03 07:19:10 UTC
AV detection:
18 of 45 (40.00%)
Threat level:
  5/5
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence ransomware spyware stealer trojan
Link:
https://tria.ge/reports/210203-lf4n2qtf5a/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Delays execution with timeout.exe
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Program Files directory
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
NanoCore
Malware Config
C2 Extraction:
hsjbvxnzmk12.myftp.biz:2028
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/befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0

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_RTF_EXPLOIT_CVE_2017_11882_4
Create hunting rule
Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882
Rule name:INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.

File information

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

Malspam

NanoCore

Word file doc befc201977528c9d3362acfd8fecb519753e277d98a97273cb6a6cfbfafaf8c0

(this sample)

  
Delivery method
Distributed via e-mail attachment

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