MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f. 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: 9


Intelligence 9 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f
SHA3-384 hash: 0dd10b90af910496d0017db13bcd5d74ebdd6eaf2a2eedb680c747a726e4a286924c7b6990b1d21622a64f585908d88a
SHA1 hash: 597794f3bc47edbcf7baed8193ddc058b919e4bf
MD5 hash: 02c51ff9f78d052b69887f19cd6f9cad
humanhash: fish-lake-hawaii-juliet
File name:allegato_84.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:4'635 bytes
First seen:2023-11-27 09:24:27 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 96:TmrpY8Y4b5xwV0Yr2QmDTkWN5BdzLVGDTEVOmAdFXC+ONJrGeed18Ge1GvxXx/xY:IpY8Y4b5x00Yr2QmcWBtLVGDQV83XrOL
TLSH T181A144483294B8881BC357D7F77F3AE0F889A6A73A600C4FC8809D547CD5D26DB94638
Reporter JAMESWT_WT
Tags:agenziaentrate js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
312
Origin country :
IT IT
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.28769.Heur.BadJS.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.JS.Obfus-2185.UNOFFICIAL
Create hunting rule

Gathering data
Verdict:
Malicious
Labled as:
Exploit.EXE
Link:
https://www.hybrid-analysis.com/sample/ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f
Result
Verdict:
MALICIOUS
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1348398
Signature
Antivirus detection for URL or domain
Creates HTML files with .exe extension (expired dropper behavior)
Deletes itself after installation
JavaScript source code contains functionality to generate code involving a shell, file or stream
JavaScript source code contains functionality to generate code involving HTTP requests or file downloads
JScript performs obfuscated calls to suspicious functions
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Potential obfuscated javascript found
System process connects to network (likely due to code injection or exploit)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
ASCII
Link:
https://malprob.io/report/ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f/
Threat name:
Win32.Exploit.Generic
Create hunting rule
Status:
Suspicious
First seen:
2023-11-27 09:18:24 UTC
File Type:
Text (JavaScript)
AV detection:
5 of 37 (13.51%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=56i7vwcx7rx54i4pbehfd6gzv3i5ycppyce2uu4qihwgz4gydihq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost rat
Link:
https://tria.ge/reports/231127-ldppxsff31/
Behaviour
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Checks computer location settings
Deletes itself
Executes dropped EXE
Blocklisted process makes network request
Downloads MZ/PE file
Remcos
Malware Config
C2 Extraction:
retghrtgwtrgtg.bounceme.net:3839
listpoints.click:7020
datastream.myvnc.com:5225
gservicese.com:2718
center.onthewifi.com:8118
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/ef91fad857fc6fde238f090e51f8d9aed1dc09efc089aa539041ec6cf0d81a0f

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_obfuscated_JS_obfuscatorio
Create hunting rule
Author:@imp0rtp3
Description:Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:https://obfuscator.io

File information

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

Comments