MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b
SHA3-384 hash: 75c068536e4aaff5bdaad647b6de926445656b1cdf0105d04eec97424adf47255f2a990e20c23664653c2f9d612292a1
SHA1 hash: 16d3d99062473242cbdd15a7a99571c49c4cad31
MD5 hash: 9bdd083aaef05b39d23fb9ed8233f4aa
humanhash: mississippi-six-oscar-freddie
File name:PO-45728-10876.doc
Download: download sample
Signature NanoCore
Create hunting rule
File size:724'443 bytes
First seen:2024-10-11 12:13:26 UTC
Last seen:Never
File type:Word file doc
MIME type:text/plain
ssdeep 6144:YwAYwAYwAYwAYwAYwAYwAYwAFSPGSpGeNKgYJ67SEv1TEQPdsh:9r
TLSH T17BF4562ED30B02599F62433B9B5B1E5545BCBA6EF38511B0346C433933EAC3DA2256BD
Magika rtf
Reporter NDA0E
Tags:CVE-2017-11882 CVE-2018-0802 doc geo GRC NanoCore

Intelligence

File Origin
# of uploads :
1
# of downloads :
417
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
PO-45728-10876.doc
Verdict:
No threats detected
Analysis date:
2024-10-11 12:20:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a7878aca-a952-4be0-8237-837bfb1faa3a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.27333.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-1.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26244.RtfHeur.UNOFFICIAL
Create hunting rule

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

MiscreantPunch.RTF.EvilRTF.CVE-2017-0199-Obfus.UNOFFICIAL
Create hunting rule

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

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

Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6709168e37fd6b1ca7b26746
Tags:
Remo
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/6709168fa617144147828396/reports/96c4fb9c-2d30-4056-82f7-71244815c34f/overview
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b
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/1531634
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Detected Nanocore Rat
Document exploit detected (process start blacklist hit)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is an obfuscated RTF file
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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: EQNEDT32.EXE connecting to internet
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: NanoCore
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Binary In User Directory Spawned From Office Application
Sigma detected: Suspicious Microsoft Office Child Process
Suricata IDS alerts for network traffic
Uses dynamic DNS services
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: 1531634 Sample: PO-45728-10876.doc Startdate: 11/10/2024 Architecture: WINDOWS Score: 100 81 Initial sample is an obfuscated RTF file 2->81 83 Multi AV Scanner detection for domain / URL 2->83 85 Suricata IDS alerts for network traffic 2->85 87 23 other signatures 2->87 9 WINWORD.EXE 291 18 2->9         started        11 taskeng.exe 1 2->11         started        13 smtpsvc.exe 2->13         started        process3 signatures4 16 EQNEDT32.EXE 11 9->16         started        21 EQNEDT32.EXE 9->21         started        23 iopfgfplug34096.exe 3 11->23         started        25 smtpsvc.exe 11->25         started        97 Adds a directory exclusion to Windows Defender 13->97 99 Injects a PE file into a foreign processes 13->99 27 powershell.exe 13->27         started        29 smtpsvc.exe 13->29         started        31 smtpsvc.exe 13->31         started        process5 dnsIp6 65 154.216.19.160, 49163, 80 SKHT-ASShenzhenKatherineHengTechnologyInformationCo Seychelles 16->65 55 C:\Users\user\AppData\...\iopfgfplug34096.exe, PE32 16->55 dropped 57 C:\Users\user\...\Um9L61WgOApLFKJ[1].exe, PE32 16->57 dropped 89 Office equation editor establishes network connection 16->89 91 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 16->91 33 iopfgfplug34096.exe 3 16->33         started        93 Adds a directory exclusion to Windows Defender 23->93 95 Injects a PE file into a foreign processes 23->95 36 iopfgfplug34096.exe 23->36         started        38 powershell.exe 23->38         started        40 smtpsvc.exe 25->40         started        42 powershell.exe 25->42         started        file7 signatures8 process9 signatures10 73 Multi AV Scanner detection for dropped file 33->73 75 Detected Nanocore Rat 33->75 77 Machine Learning detection for dropped file 33->77 79 3 other signatures 33->79 44 iopfgfplug34096.exe 1 12 33->44         started        49 powershell.exe 4 33->49         started        process11 dnsIp12 67 blv23728.ddns.net 44->67 69 blv23728.ddns.net 103.151.125.139, 49164, 49165, 49166 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN unknown 44->69 71 127.0.0.1 unknown unknown 44->71 59 C:\Program Files (x86)\...\smtpsvc.exe, PE32 44->59 dropped 61 C:\Users\user\AppData\Roaming\...\run.dat, SGI 44->61 dropped 63 C:\Users\user\AppData\Local\...\tmpE495.tmp, XML 44->63 dropped 101 Detected Nanocore Rat 44->101 103 Hides that the sample has been downloaded from the Internet (zone.identifier) 44->103 51 schtasks.exe 44->51         started        53 schtasks.exe 44->53         started        105 Installs new ROOT certificates 49->105 file13 107 Uses dynamic DNS services 67->107 signatures14 process15
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-10-10 11:23:31 UTC
File Type:
Document
Extracted files:
3
AV detection:
17 of 38 (44.74%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=l5lsrf45q6m3toetiquj2efpvuyw5foiouvsbvfohmkvrbclgnvq._file
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore discovery evasion execution keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/241011-pebq8s1frg/
Behaviour
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Downloads MZ/PE file
NanoCore
Malware Config
C2 Extraction:
blv23728.ddns.net:6110
127.0.0.1:6110
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/a08326c7-551a-466b-a177-e022fb077b8a
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b

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: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
Rule name:SUSP_RTF_Header_Anomaly_RID2F7F
Create hunting rule
Author:Florian Roth
Description:Detects malformed RTF header often used to trick mechanisms that check for a full RTF header
Reference:https://twitter.com/ItsReallyNick/status/975705759618158593

File information

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

Malspam

NanoCore

Word file doc 5f5728979d8799b9b89344289d10afad316e95c8752b20d4ae3b1558844b336b

(this sample)

NanoCore

Executable exe c56b0068b210b206f7c93062eb115654919ea50fcb21a35391b25e33fcf92af2

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 c56b0068b210b206f7c93062eb115654919ea50fcb21a35391b25e33fcf92af2
  
Dropping
MD5 3f6058dbb64084df7f3da0a1cb23a872

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