MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
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SHA256 hash: 71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218
SHA3-384 hash: 296ec659ab189cfc581ccd701682cd6561a37986b75c0ff3ee1749a925ea026c88689ea7a29f8157c01d95bf67c37fd9
SHA1 hash: 77f806c79b7d92efe778c072e89b5a83088cdd2f
MD5 hash: 3dcb3fb694633af8bd3790f1d7be79d0
humanhash: east-delta-lamp-carbon
File name:Factura 79.doc
Download: download sample
Signature NanoCore
Create hunting rule
File size:199'799 bytes
First seen:2024-03-01 14:33:59 UTC
Last seen:2024-03-01 16:36:22 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 768:awAbZSibMX9gRWjtwAbZSibMX9gRWjtwAbZSibMX9gRWjG8OIMjL1BbgmR0Efa1C:awAlRkwAlRkwAlR5tIMj3gphHYgDaT6W
TLSH T1BD14682DD34B02698F620377AB571E5141BDBB6EF78552B1302C533933EAC39A1252BE
Reporter pr0xylife
Tags:CVE-2017-11882 doc NanoCore

Intelligence

File Origin
# of uploads :
2
# of downloads :
389
Origin country :
DE DE
Vendor Threat Intelligence
Verdict:
Legit
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RoomService.20230808.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit packed shellcode
Link:
https://www.filescan.io/uploads/65e1e75d7c8df15f5be96b1e/reports/6d22d00b-2d50-465d-8e49-dbc2fccaa93b/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218
Label:
Malicious
Suspicious Score:
10/10
Score Malicious:
1%
Score Benign:
0%
Link:
https://www.malware.ai/gui/files/?id=823b09c3-b1e8-43d5-9591-d9e188c025e2
Result
Verdict:
MALICIOUS
Result
Threat name:
Nanocore, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1401461
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected Nanocore Rat
Document exploit detected (process start blacklist hit)
Drops PE files with a suspicious file extension
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Equation Editor Network Connection
Sigma detected: NanoCore
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Microsoft Office Child Process
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Yara detected PureLog Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1401461 Sample: Factura 79.doc Startdate: 01/03/2024 Architecture: WINDOWS Score: 100 64 Found malware configuration 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 Antivirus detection for URL or domain 2->68 70 23 other signatures 2->70 9 WINWORD.EXE 291 15 2->9         started        12 taskeng.exe 1 2->12         started        14 smtpsvc.exe 2->14         started        process3 file4 56 ~WRF{853A1A9C-0B5F...5-BF5018A7DBA9}.tmp, Composite 9->56 dropped 17 EQNEDT32.EXE 11 9->17         started        22 smtpsvc.exe 3 12->22         started        98 Adds a directory exclusion to Windows Defender 14->98 100 Injects a PE file into a foreign processes 14->100 24 powershell.exe 14->24         started        26 smtpsvc.exe 14->26         started        signatures5 process6 dnsIp7 58 universalmovies.top 104.21.74.191, 443, 49160 CLOUDFLARENETUS United States 17->58 46 C:\Users\user\AppData\Roaming\cat67922.scr, PE32 17->46 dropped 48 C:\Users\user\AppData\Local\...\catzx[1].scr, PE32 17->48 dropped 72 Installs new ROOT certificates 17->72 74 Office equation editor establishes network connection 17->74 76 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 17->76 28 cat67922.scr 1 8 17->28         started        78 Adds a directory exclusion to Windows Defender 22->78 80 Injects a PE file into a foreign processes 22->80 31 smtpsvc.exe 22->31         started        33 powershell.exe 22->33         started        file8 signatures9 process10 signatures11 90 Antivirus detection for dropped file 28->90 92 Multi AV Scanner detection for dropped file 28->92 94 Detected Nanocore Rat 28->94 96 4 other signatures 28->96 35 cat67922.scr 1 10 28->35         started        40 powershell.exe 4 28->40         started        process12 dnsIp13 60 tzitziklishop3.ddns.net 35->60 62 tzitziklishop3.ddns.net 103.114.104.158, 1663, 49162, 49163 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN Viet Nam 35->62 50 C:\Users\user\AppData\Roaming\...\run.dat, COM 35->50 dropped 52 C:\Program Files (x86)\...\smtpsvc.exe, PE32 35->52 dropped 54 C:\Users\user\AppData\Local\...\tmpFA27.tmp, XML 35->54 dropped 82 Detected Nanocore Rat 35->82 84 Hides that the sample has been downloaded from the Internet (zone.identifier) 35->84 42 schtasks.exe 35->42         started        44 schtasks.exe 35->44         started        86 Installs new ROOT certificates 40->86 file14 88 Uses dynamic DNS services 60->88 signatures15 process16
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-03-01 09:30:59 UTC
File Type:
Document
Extracted files:
4
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=oftq7dvyekzym4fwf2hfc55i3ihd4cgdyjsvm7b5knczluwjuima._file
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240301-rxelysgg4y/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
NanoCore
Malware Config
C2 Extraction:
tzitziklishop3.ddns.net:1663
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/71670f8eb822/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Nanocore
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/71670f8eb822b38670b62e8e5177a8da0e3e08c3c265567c3d534595d2c9a218

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_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.
Rule name:SUSP_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection

File information

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

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