MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377. 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: 14


Intelligence 14 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377
SHA3-384 hash: 063d8e66f6be00dcb71caf1e0c2903531a6563507e30909352f55198d27cd192931359d0b95bf8e416aa3925bbc42f46
SHA1 hash: 12adf24ecf47e43c22f9641fdf4cfbaae4f55ced
MD5 hash: 04f40400495c1c17270f9c71e6d40717
humanhash: jupiter-beryllium-avocado-music
File name:SecuriteInfo.com.Exploit.CVE-2017-11882.123.26143.10677
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:78'058 bytes
First seen:2024-08-13 09:18:00 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:UO6e8N6uU8W5R6UuC0m9dtyvKHbHWH6faCeg0mtSbj3q6qBxt2nhD9V1V:MLNw8c6UT08dkSHbbfFgKJbcnhhV
TLSH T1BB730149D38F41A4CF84A633531B1A8845FDB73EB31112B270AD933137EE92E556A67C
Reporter SecuriteInfoCom
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
115
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Exploit.CVE-2017-11882.123.26143.10677
Verdict:
No threats detected
Analysis date:
2024-08-13 09:21:40 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/efb0a779-1c77-4952-9b1f-ef01542ef7e6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
Detection(s):
SecuriteInfo.com.Exploit.CVE-2017-11882.123.26143.10677.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilRTF.ObfusRunAway.20240409.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66bb24d0aa5b40be0aa02621
Tags:
Encryption Execution Exploit Generic Network Office Stealth Obfuscated
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
DNS request
Connection attempt
Sending a custom TCP request
Reading critical registry keys
Creating a file in the %temp% directory
Possible injection to a system process
Connection attempt by exploiting the app vulnerability
Stealing user critical data
Creating a process from a recently created file
Launching a file downloaded from the Internet
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
88%
Link:
https://www.filescan.io/uploads/66bb24cfb70f08db50c5ebea/reports/d1f003de-9bc5-4def-ac60-03fb4297e2f2/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1492077
Signature
Antivirus / Scanner detection for submitted sample
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 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
Delayed program exit found
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Searches for Windows Mail specific files
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
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
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
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1492077 Sample: SecuriteInfo.com.Exploit.CV... Startdate: 13/08/2024 Architecture: WINDOWS Score: 100 53 Multi AV Scanner detection for domain / URL 2->53 55 Found malware configuration 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 21 other signatures 2->59 11 WINWORD.EXE 291 14 2->11         started        process3 process4 13 EQNEDT32.EXE 12 11->13         started        18 EQNEDT32.EXE 11->18         started        dnsIp5 45 107.172.31.124, 49161, 49163, 80 AS-COLOCROSSINGUS United States 13->45 41 C:\Users\...\sweetbutterbuneatingtaste.vBS, Unicode 13->41 dropped 85 Office equation editor establishes network connection 13->85 87 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 13->87 20 wscript.exe 1 13->20         started        file6 signatures7 process8 signatures9 69 Suspicious powershell command line found 20->69 71 Wscript starts Powershell (via cmd or directly) 20->71 73 Very long command line found 20->73 75 3 other signatures 20->75 23 powershell.exe 4 20->23         started        process10 signatures11 77 Suspicious powershell command line found 23->77 79 Suspicious execution chain found 23->79 26 powershell.exe 12 5 23->26         started        process12 dnsIp13 43 servidorwindows.ddns.com.br 177.106.217.75, 49162, 80 ALGARTELECOMSABR Brazil 26->43 81 Writes to foreign memory regions 26->81 83 Injects a PE file into a foreign processes 26->83 30 RegAsm.exe 3 10 26->30         started        signatures14 process15 dnsIp16 47 2024remcmon.duckdns.org 30->47 49 2024remcmon.duckdns.org 192.210.214.9, 14645, 49164, 49165 AS-COLOCROSSINGUS United States 30->49 51 geoplugin.net 178.237.33.50, 49166, 80 ATOM86-ASATOM86NL Netherlands 30->51 89 Contains functionality to bypass UAC (CMSTPLUA) 30->89 91 Detected Remcos RAT 30->91 93 Tries to steal Mail credentials (via file registry) 30->93 97 6 other signatures 30->97 34 RegAsm.exe 1 30->34         started        37 RegAsm.exe 1 30->37         started        39 RegAsm.exe 11 30->39         started        signatures17 95 Uses dynamic DNS services 47->95 process18 signatures19 61 Tries to steal Instant Messenger accounts or passwords 34->61 63 Tries to steal Mail credentials (via file / registry access) 34->63 65 Searches for Windows Mail specific files 34->65 67 Tries to harvest and steal browser information (history, passwords, etc) 37->67
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-08-12 17:53:16 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=wmedp3wgkd6wokpao3ody5wc7yze2hbyavl5xxj3uf4nv2zbcn3q._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240813-k9m1jazfkn/
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:
http://servidorwindows.ddns.com.br/Files/vbs.jpeg
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/ad6bb655-cf36-457f-bf06-36dfbf371f22
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b30837eec650/report/overview.html
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/b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377

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 b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3104408/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3104413/

Comments