MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864. 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: dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864
SHA3-384 hash: 78af99354985d17a5946f8eb4bcff9b1c9d1ef819b63a374fd13c9d94897164123175d055223ae8dfc79d55ea2662451
SHA1 hash: 5678919e366a7dd719eaa4dfc59f1d7babb8df95
MD5 hash: 8fc2325796c442f7b322f71177adde3f
humanhash: kitten-finch-echo-white
File name:RFQ - 603876355.doc
Download: download sample
Signature NanoCore
Create hunting rule
File size:689'590 bytes
First seen:2020-12-16 15:49:36 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 12288:eIA1TNEIlpGTS5TQVNX7/yvExdE2s07ldkg8bc2K2wutJwSTMYK2:eIA1xGTS5MV1/yvEx22s0hCbCZutJwSx
TLSH 65E4AFBC76047DE6666F566BCA96ADDC03B52723CACBA8CD4064B7C305A3375FE02805
Reporter abuse_ch
Tags:doc NanoCore


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: ae.ucg-ae.com
Sending IP: 205.251.156.51
From: Kerry <info@northbaseiraq.com>
Subject: Auditor vacancy
Attachment: RFQ - 603876355.doc

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE dump

Intelligence

File Origin
# of uploads :
1
# of downloads :
228
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ - 603876355.doc
Verdict:
Malicious activity
Analysis date:
2020-12-16 16:18:20 UTC
Tags:
exploit CVE-2017-11882 loader rat nanocore
Link:
https://app.any.run/tasks/36c3ad08-65a9-475b-9488-477297805a80

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):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.170830.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.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
Launching the default Windows debugger (dwwin.exe)
Sending an HTTP GET request
Sending a TCP request to an infection source
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
Enabling autorun by creating a file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864/results/dashboard
Result
Gathering data
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/564429
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Connects to a pastebin service (likely for C&C)
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 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: 331322 Sample: RFQ - 603876355.doc Startdate: 16/12/2020 Architecture: WINDOWS Score: 100 82 Found malware configuration 2->82 84 Malicious sample detected (through community Yara rule) 2->84 86 Antivirus detection for URL or domain 2->86 88 12 other signatures 2->88 8 EQNEDT32.EXE 11 2->8         started        13 taskeng.exe 1 2->13         started        15 smtpsvc.exe 2->15         started        17 WINWORD.EXE 291 19 2->17         started        process3 dnsIp4 78 mute-saga-0240.lovesick.jp 163.44.185.199, 49167, 80 INTERQGMOInternetIncJP Japan 8->78 70 C:\Users\user\AppData\Roaming\MKD.exe, PE32 8->70 dropped 72 C:\Users\user\AppData\Local\...\OSW[1].exe, PE32 8->72 dropped 98 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->98 19 MKD.exe 12 1 8->19         started        23 WerFault.exe 8->23         started        25 WerFault.exe 8->25         started        27 WerFault.exe 8->27         started        29 smtpsvc.exe 12 1 13->29         started        31 MKD.exe 1 13->31         started        80 hastebin.com 15->80 100 Hides threads from debuggers 15->100 102 Injects a PE file into a foreign processes 15->102 33 cmd.exe 15->33         started        35 smtpsvc.exe 15->35         started        file5 signatures6 process7 dnsIp8 74 hastebin.com 172.67.143.180, 443, 49168, 49170 CLOUDFLARENETUS United States 19->74 90 Hides threads from debuggers 19->90 92 Injects a PE file into a foreign processes 19->92 94 Contains functionality to hide a thread from the debugger 19->94 37 MKD.exe 1 9 19->37         started        42 cmd.exe 19->42         started        44 cmd.exe 29->44         started        46 smtpsvc.exe 29->46         started        48 cmd.exe 31->48         started        50 MKD.exe 31->50         started        signatures9 process10 dnsIp11 76 gsyagvxnzmkoplbhduisbagtevcnxmzlopljdgye.ydns.eu 46.243.237.119, 2177 M247GB Netherlands 37->76 64 C:\Program Files (x86)\...\smtpsvc.exe, PE32 37->64 dropped 66 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 37->66 dropped 68 C:\Users\user\AppData\Local\...\tmp15D2.tmp, XML 37->68 dropped 96 Hides that the sample has been downloaded from the Internet (zone.identifier) 37->96 52 schtasks.exe 37->52         started        54 schtasks.exe 37->54         started        56 timeout.exe 42->56         started        58 timeout.exe 42->58         started        60 timeout.exe 44->60         started        62 timeout.exe 48->62         started        file12 signatures13 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-12-16 15:50:08 UTC
AV detection:
22 of 48 (45.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3rmivynduxygumameyqlhbk5ctadd25zqlk3u5zso5llxzjf7bsa._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/201216-bek3cn59bn/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
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
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Program crash
Drops file in Program Files directory
Drops file in Windows directory
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
ServiceHost packer
NanoCore
Malware Config
C2 Extraction:
gsyagvxnzmkoplbhduisbagtevcnxmzlopljdgye.ydns.eu:2177
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/dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864

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 dc588ae1a3a5f06a300c2620b3855d14c031ebb982d5ba77327756bbe525f864

(this sample)

  
Delivery method
Distributed via e-mail attachment

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