MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba. 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: 15


Intelligence 15 IOCs YARA 1 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba
SHA3-384 hash: ab914c5110d27a45741a9b2d209e8ab54c35ba39bda6485f331e9541c1c0c07f81a357248e7daefd87115ad8ad26d053
SHA1 hash: 547181a297641e736ea89b8ac75635dc7186f875
MD5 hash: 0a052f8d7d1dd625c750fe579d2c610c
humanhash: red-oxygen-glucose-video
File name:0a052f8d7d1dd625c750fe579d2c610c
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:83'717 bytes
First seen:2024-08-02 12:36:27 UTC
Last seen:2024-08-02 14:25:50 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:kXOYqWofANKOmkxuIdb9KsxfelRrg3/7dt+kRvciw3QvP20/WpgaqkoS0Gdk:NYqWof6KOmkxuIus0lRrg3uk20/agww
TLSH T1CF83DF58D78F45A5CF94A233132A4A8945FCB77EB34202B5706C833637ECD2E586A97C
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
112
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
http://45.90.89.50/70/hbu/wereallyneedthisgirlbacktomyplacebecausesheissweetrosehoneygirlwhichireallyliketodowithherfanboysheisgreatthings________sheiscutrebabygirlforme.doc
Verdict:
Malicious activity
Analysis date:
2024-08-02 07:15:48 UTC
Tags:
cve-2017-11882 exploit opendir
Link:
https://app.any.run/tasks/16e248e2-a7a9-4c5f-830a-403edbb2f520

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66acd2f3037b02d0daed1ef9
Tags:
Discovery Encryption Execution Exploit Generic Infostealer Network Office Stealth
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Sending an HTTP GET request
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a process with a hidden window
Launching a service
Possible injection to a system process
Connection attempt by exploiting the app vulnerability
Creating a process from a recently created file
Launching a file downloaded from the Internet
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/66acd2f98f66298c01f51907/reports/08296927-a988-48c6-97e5-89b77f73b8e8/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba
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/1486793
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
Delayed program exit found
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Found malware configuration
Found potential equation exploit (CVE-2017-11882)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Office drops RTF file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell download and load assembly
Sigma detected: Remcos
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Uses dynamic DNS services
Very long command line found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1486793 Sample: ECjuq8pNwb.rtf Startdate: 02/08/2024 Architecture: WINDOWS Score: 100 57 Found malware configuration 2->57 59 Malicious sample detected (through community Yara rule) 2->59 61 Antivirus detection for URL or domain 2->61 63 22 other signatures 2->63 10 WINWORD.EXE 336 17 2->10         started        process3 file4 37 C:\Users\...\~WRD0000.tmp:Zone.Identifier, ASCII 10->37 dropped 39 C:\Users\user\Desktop\~WRD0000.tmp, Rich 10->39 dropped 41 C:\Users\user\DesktopCjuq8pNwb.rtf (copy), Rich 10->41 dropped 43 ~WRF{1404802D-02A0...9-1DC72DC17AEB}.tmp, Composite 10->43 dropped 13 EQNEDT32.EXE 12 10->13         started        process5 dnsIp6 49 45.90.89.50, 49163, 49165, 80 CMCSUS Bulgaria 13->49 45 C:\...\mycuteflowergirlsheisneedmetooge.vBS, Unicode 13->45 dropped 97 Office equation editor establishes network connection 13->97 99 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 13->99 18 wscript.exe 1 13->18         started        file7 signatures8 process9 signatures10 65 Suspicious powershell command line found 18->65 67 Wscript starts Powershell (via cmd or directly) 18->67 69 Very long command line found 18->69 71 3 other signatures 18->71 21 powershell.exe 4 18->21         started        process11 signatures12 73 Suspicious powershell command line found 21->73 75 Suspicious execution chain found 21->75 24 powershell.exe 12 5 21->24         started        process13 dnsIp14 47 ia803104.us.archive.org 207.241.232.154, 443, 49164 INTERNET-ARCHIVEUS United States 24->47 77 Installs new ROOT certificates 24->77 79 Writes to foreign memory regions 24->79 81 Injects a PE file into a foreign processes 24->81 28 RegAsm.exe 24->28         started        31 RegAsm.exe 3 13 24->31         started        signatures15 process16 dnsIp17 83 Contains functionality to bypass UAC (CMSTPLUA) 28->83 85 Contains functionality to steal Chrome passwords or cookies 28->85 87 Contains functionality to register a low level keyboard hook 28->87 95 2 other signatures 28->95 51 sembe.duckdns.org 31->51 53 sembe.duckdns.org 194.187.251.115, 14645, 49166 M247GB United Kingdom 31->53 55 geoplugin.net 178.237.33.50, 49167, 80 ATOM86-ASATOM86NL Netherlands 31->55 35 C:\Users\user\AppData\Local\Temp\...\nots.dat, data 31->35 dropped 89 Detected Remcos RAT 31->89 91 Installs a global keyboard hook 31->91 file18 93 Uses dynamic DNS services 51->93 signatures19
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-08-02 11:26:26 UTC
File Type:
Document
Extracted files:
4
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2i53n572ynbwubol6n74twvblk3nete2k4fhptbtq5uhq2v3eg5a._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240802-ptf99swhmj/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
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
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Malware Config
Dropper Extraction:
https://ia803104.us.archive.org/27/items/vbs_20240726_20240726/vbs.jpg
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/0a75f47b-2b3b-4a6f-895a-3d4295dc7c5d
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d23bb6f7fac3/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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

File information

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

Web download

RemcosRAT

Rich Text Format (RTF) rtf d23bb6f7fac3436a05cbf37fc9daa15ab6d24c9a570a77cc338768786abb21ba

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3084811/

Comments


Avatar
zbet commented on 2024-08-02 12:36:28 UTC

url : hxxp://45.90.89.50/70/hbu/wereallyneedthisgirlbacktomyplacebecausesheissweetrosehoneygirlwhichireallyliketodowithherfanboysheisgreatthings________sheiscutrebabygirlforme.doc