MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be. 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


RemcosRAT


Vendor detections: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be
SHA3-384 hash: d737693b8cb1576144127c7245f2b9ba9f27a50a7947769841846e16d2ca5a08f107af7b3f3d62da39089b9ed134b717
SHA1 hash: 39d7f3f30a88c78cbd121e8d949354f4754e3069
MD5 hash: 752ca4e392e394f754a13e7ea56af4b1
humanhash: fillet-fifteen-sink-yellow
File name:RFQ.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'596'639 bytes
First seen:2021-02-03 07:18:57 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 24576:y9GZ4BSofTNaJdtGUpLAShyNemOKnjou0jV0k1W8iCfSGka3ea8TwcQ75oBqbwf+:V
TLSH 81C5BFF876047DE6267F576BDA96ACDC03B626239ACBA4CD806477C305A3375FE02805
Reporter abuse_ch
Tags:doc RemcosRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: cnstationers.co.zw
Sending IP: 46.183.220.34
From: Andrew Masvikeni <amasvikeni@yahoo.com>
Subject: Re: Quote
Attachment: RFQ.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ.doc
Verdict:
Malicious activity
Analysis date:
2021-02-03 07:20:18 UTC
Tags:
exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/06768e93-43e0-4503-b868-55e585a3bb1a

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
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Launching the default Windows debugger (dwwin.exe)
Deleting a recently created file
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
Setting a global event handler for the keyboard
Sending a TCP request to an infection source
Creating a process from a recently created file
Sending an HTTP GET request to an infection source
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/597485
Signature
Antivirus detection for URL or domain
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Hides threads from debuggers
Injects a PE file into a foreign processes
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 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: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 347781 Sample: RFQ.doc Startdate: 03/02/2021 Architecture: WINDOWS Score: 100 58 Multi AV Scanner detection for domain / URL 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 Antivirus detection for URL or domain 2->62 64 8 other signatures 2->64 12 EQNEDT32.EXE 1 2->12         started        17 WINWORD.EXE 336 21 2->17         started        19 EQNEDT32.EXE 2->19         started        process3 dnsIp4 56 sfghfsfjskdjkdfbvndcnfjskaklwrrfw.ydns.eu 46.183.220.125, 49165, 80 DATACLUBLV Latvia 12->56 48 C:\Users\user\AppData\Roaming\BYC.exe, PE32 12->48 dropped 82 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->82 21 BYC.exe 12 1 12->21         started        50 C:\Users\user\Desktop\~$RFQ.doc, data 17->50 dropped file5 signatures6 process7 dnsIp8 52 193.239.147.103, 49166, 49167, 80 DEDIPATH-LLCUS Brunei Darussalam 21->52 74 Multi AV Scanner detection for dropped file 21->74 76 Contains functionality to steal Chrome passwords or cookies 21->76 78 Contains functionality to capture and log keystrokes 21->78 80 6 other signatures 21->80 25 BYC.exe 1 3 21->25         started        28 cmd.exe 21->28         started        signatures9 process10 file11 46 C:\Users\user\AppData\Roaming\win.exe, PE32 25->46 dropped 30 wscript.exe 1 25->30         started        32 timeout.exe 28->32         started        process12 process13 34 cmd.exe 30->34         started        process14 36 win.exe 12 1 34->36         started        signatures15 66 Multi AV Scanner detection for dropped file 36->66 68 Contains functionality to steal Chrome passwords or cookies 36->68 70 Contains functionality to capture and log keystrokes 36->70 72 3 other signatures 36->72 39 win.exe 2 1 36->39         started        42 cmd.exe 36->42         started        process16 dnsIp17 54 wedsazxcvfghyuiokjhbnvfcdsaweyplmhbvrtud.ydns.eu 37.230.130.18, 1996, 49168 VOXILITYGB Netherlands 39->54 44 timeout.exe 42->44         started        process18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-03 06:14:37 UTC
AV detection:
20 of 45 (44.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=bn45a44xqxug6a6d4yziz74tw74xrj7dtwba2eb6otji74isw67a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence ransomware rat
Link:
https://tria.ge/reports/210203-zchhmz1hla/
Behaviour
Checks processor information in registry
Delays execution with timeout.exe
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
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
Program crash
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
wedsazxcvfghyuiokjhbnvfcdsaweyplmhbvrtud.ydns.eu:1996
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be

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

RemcosRAT

Word file doc 0b79d0739785e86f03c3e6328cff93b7f978a7e39d820d103e74d28ff112b7be

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments