MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae
SHA3-384 hash: 55ada5d11dd41a87cda8bc8a6dfa1890107b0cb2db8d4e52f324e0d0f56d908b2f900d67c289b70347f3d1fcb7959395
SHA1 hash: f40dfc3f94abad4f63010239d7a55f164d74d073
MD5 hash: a2e15a15841102aaa128f682ec572b41
humanhash: iowa-bluebird-kilo-vegan
File name:PI7812367813.doc
Download: download sample
Signature NanoCore
Create hunting rule
File size:139'578 bytes
First seen:2023-11-29 14:32:36 UTC
Last seen:Never
File type:Word file doc
MIME type:text/plain
ssdeep 768:4wAbZSibMX9gRWjsU67VMS9E3uIagPFEbZLIQATaj17nQ:4wAlRvUGnE3uIa0FuZmuj17nQ
TLSH T145D3786DD34B01AA8F5253329B1B1E9442BDBA7EF38611B1306C437537EAC3D91292BD
Reporter Xev
Tags:AgentTesla Andromeda CVE-2017-11882 doc Downloader NanoCore rtf


Avatar
NIXLovesCooper
AgentTesla, Andromeda, NanoCore payload: http://zang1.almashreaq.top/_errorpages/plugmanzx.exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
391
Origin country :
GR GR
Vendor Threat Intelligence
Malware family:
nanocore
Create hunting rule
ID:
1
File name:
SPAM.zip
Verdict:
Malicious activity
Analysis date:
2023-11-29 14:37:48 UTC
Tags:
exploit cve-2017-11882 loader nanocore rat remote agenttesla stealer
Link:
https://app.any.run/tasks/8d0eafda-0fe7-4b3c-8b85-3a893b613dcb

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Spam-473.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
Query of malicious DNS domain
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae
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/1350079
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
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
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
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: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic
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: 1350079 Sample: PI7812367813.doc Startdate: 29/11/2023 Architecture: WINDOWS Score: 100 59 Initial sample is an obfuscated RTF file 2->59 61 Snort IDS alert for network traffic 2->61 63 Found malware configuration 2->63 65 19 other signatures 2->65 8 EQNEDT32.EXE 11 2->8         started        13 taskeng.exe 1 2->13         started        15 smtpsvc.exe 2->15         started        17 WINWORD.EXE 291 16 2->17         started        process3 dnsIp4 53 zang1.almashreaq.top 104.21.70.74, 49161, 80 CLOUDFLARENETUS United States 8->53 41 C:\Users\user\AppData\...\plugman75907.exe, PE32 8->41 dropped 43 C:\Users\user\AppData\...\plugmanzx[1].exe, PE32 8->43 dropped 77 Office equation editor establishes network connection 8->77 79 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->79 19 plugman75907.exe 1 7 8->19         started        22 plugman75907.exe 2 13->22         started        24 smtpsvc.exe 2 13->24         started        81 Injects a PE file into a foreign processes 15->81 26 smtpsvc.exe 15->26         started        45 ~WRF{189490BA-125C...4-35160FE700A7}.tmp, Composite 17->45 dropped file5 signatures6 process7 signatures8 67 Multi AV Scanner detection for dropped file 19->67 69 Detected Nanocore Rat 19->69 71 Machine Learning detection for dropped file 19->71 73 Uses schtasks.exe or at.exe to add and modify task schedules 19->73 28 plugman75907.exe 1 12 19->28         started        75 Injects a PE file into a foreign processes 22->75 33 plugman75907.exe 22->33         started        35 smtpsvc.exe 24->35         started        process9 dnsIp10 55 rn72836.sytes.net 103.114.106.29, 49164, 49165, 49166 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN Viet Nam 28->55 57 127.0.0.1 unknown unknown 28->57 47 C:\Program Files (x86)\...\smtpsvc.exe, PE32 28->47 dropped 49 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 28->49 dropped 51 C:\Users\user\AppData\Local\...\tmp4145.tmp, XML 28->51 dropped 83 Detected Nanocore Rat 28->83 85 Hides that the sample has been downloaded from the Internet (zone.identifier) 28->85 37 schtasks.exe 28->37         started        39 schtasks.exe 28->39         started        file11 signatures12 process13
Score:
99%
Verdict:
Malware
File Type:
ASCII
Link:
https://malprob.io/report/7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-11-28 04:45:14 UTC
File Type:
Document
Extracted files:
4
AV detection:
14 of 23 (60.87%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pixz4qi3ow6t772n4pwmvxqxu7dszaim26dbiurzvmqzkdtwdkxa._file
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/231129-wyq4labf2x/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
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
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
Downloads MZ/PE file
NanoCore
Malware Config
C2 Extraction:
rn72836.sytes.net:6696
127.0.0.1:6696
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/7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae

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
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 7a2f9e411b75bd3fff4de3eccade17a7c72c810cd786145239ab21950e761aae

(this sample)

NanoCore

Executable exe e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5

  
Dropping
SHA256 e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5
  
Delivery method
Distributed via e-mail attachment

Comments