MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308. 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: 3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308
SHA3-384 hash: 8345e411836dd45e636683a21f2de485a86b4bcd560a8844322286484873d89e9f10fe851ba73bad6e81d776ae882857
SHA1 hash: ad65713260687c65091ca17ca6eee44c8fbf0126
MD5 hash: 4ea28268f6fc90f0e5cd4364b237b8e2
humanhash: twenty-seven-california-angel
File name:RFQ_f319c744-00b6-42df-aa0b-19a7524ce222.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:651'425 bytes
First seen:2025-01-28 12:53:46 UTC
Last seen:Never
File type:Word file doc
MIME type:text/plain
ssdeep 6144:hwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAa:kT
TLSH T18AD4282DD34E0259CF620277AB561E5142FDBB7AF38552A1302C537933EEC2DA1252BE
Magika rtf
Reporter NDA0E
Tags:CVE-2017-11882 doc geo GRC RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
478
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ_f319c744-00b6-42df-aa0b-19a7524ce222.doc
Verdict:
No threats detected
Analysis date:
2025-01-28 13:03:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e6207694-2021-462d-8843-044d7f284b38

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
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

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6798d50229ae628cf42a5d8c
Tags:
virus
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a window
Using the Windows Management Instrumentation requests
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit obfuscated packed shellcode
Link:
https://www.filescan.io/uploads/6798d37639aa2bdf29b33f14/reports/6efab041-fd13-4757-9dff-2492e96b575e/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308
Result
Verdict:
MALICIOUS
Result
Threat name:
n/a
Detection:
malicious
Classification:
n/a
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1601333
Signature
Antivirus / Scanner detection for submitted sample
Initial sample is an obfuscated RTF file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2025-01-18 14:35:00 UTC
File Type:
Document
Extracted files:
3
AV detection:
15 of 38 (39.47%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hbtle7xyfowq6otnbyckssaio34tbuiy3ckilvzgejsr2mktcmea._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost discovery execution rat
Link:
https://tria.ge/reports/250128-p47j7sskbj/
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
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Downloads MZ/PE file
Remcos
Remcos family
Malware Config
C2 Extraction:
www.kposlifestyle.design:2404
Verdict:
Informative
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/d8f31478-5097-4244-baa0-3a0daa034129
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
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

RemcosRAT

Word file doc 3866b27ef82bad0f3a6d0e04a9480876f930d118d89485d72622651d31531308

(this sample)

RemcosRAT

Executable exe b5bc975891963c29a16fe8ac7dd612f15afe937fd14ba95707a6ab30224bfc7a

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 b5bc975891963c29a16fe8ac7dd612f15afe937fd14ba95707a6ab30224bfc7a
  
Dropping
MD5 4144b5ab8b096fc4115760eee6011598

Comments