MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17. 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: 12


Intelligence 12 IOCs YARA 20 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17
SHA3-384 hash: ff27b4ca9e8b1d299522c17c30ef5becf9a59ff3efb4687213b8ea6ba828af8c9bb1ca17baf930be509f08c942ea0915
SHA1 hash: 9f4f5f0b04cd9c46fc17ebfcdf6c4c2f4531db9a
MD5 hash: f109c83aeab0b5b6c22a66ea97973313
humanhash: eight-asparagus-blue-solar
File name:RFQ 181048622.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'132'960 bytes
First seen:2025-07-15 11:05:08 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:6FNFZiqWAxLeA4vAfmtBzvf+k79xTJp9YOrqkdB+Dz5PBJBa/Tfk1STMqRDFrjoD:Hql6d/L7Fo7P56hHDl0wfxsn
Threatray 4'137 similar samples on MalwareBazaar
TLSH T18FA523318D93BD9B176C294854182E842CA41FD7CAA8D6B8FB8964A371C9714CF5FCF8
Magika javascript
Reporter lowmal3
Tags:js RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
41
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Generic-EXE.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.Base64EXE-2.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68763602900df8e7f86af449
Tags:
vmdetect delphi emotet
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 dropper fingerprint mimikatz obfuscated obfuscated overlay packed
Link:
https://www.filescan.io/uploads/687635fb7bc45bdee1acca2a/reports/cf1e9184-0ae4-46bf-aa52-e9e77d729724/overview
Verdict:
Malicious
Labled as:
GT:JS.Cbum.1
Link:
https://www.hybrid-analysis.com/sample/d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17
Result
Threat name:
Remcos, DBatLoader
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1736900
Signature
Allocates many large memory junks
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Early bird code injection technique detected
Found malware configuration
JavaScript file contains suspicious strings
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Remcos
Sigma detected: Suspicious Creation with Colorcpl
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Yara detected DBatLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1736900 Sample: RFQ 181048622.js Startdate: 15/07/2025 Architecture: WINDOWS Score: 100 50 email-server.xyz 2->50 52 geoplugin.net 2->52 58 Suricata IDS alerts for network traffic 2->58 60 Found malware configuration 2->60 62 Malicious sample detected (through community Yara rule) 2->62 66 13 other signatures 2->66 10 wscript.exe 1 2 2->10         started        14 Rrasfdxd.exe 2->14         started        16 Rrasfdxd.exe 2->16         started        signatures3 64 Performs DNS queries to domains with low reputation 50->64 process4 file5 46 C:\Users\user\AppData\Local\Temp\x.exe, PE32 10->46 dropped 72 Benign windows process drops PE files 10->72 74 JScript performs obfuscated calls to suspicious functions 10->74 76 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->76 18 x.exe 10 10->18         started        78 Early bird code injection technique detected 14->78 80 Allocates memory in foreign processes 14->80 82 Allocates many large memory junks 14->82 22 SndVol.exe 14->22         started        24 colorcpl.exe 16->24         started        signatures6 process7 file8 42 C:\Users\user\...\K3K_181_Rrasfdxdksm.exe, PE32 18->42 dropped 44 C:\Users\user\AppData\...\K3K_181_Rrasfdxdksm, ASCII 18->44 dropped 68 Multi AV Scanner detection for dropped file 18->68 26 K3K_181_Rrasfdxdksm.exe 1 6 18->26         started        70 Detected Remcos RAT 24->70 signatures9 process10 file11 48 C:\Users\user\Links\Rrasfdxd.exe (copy), PE32 26->48 dropped 84 Multi AV Scanner detection for dropped file 26->84 86 Early bird code injection technique detected 26->86 88 Allocates memory in foreign processes 26->88 90 3 other signatures 26->90 30 colorcpl.exe 2 13 26->30         started        34 cmd.exe 3 26->34         started        36 cmd.exe 1 26->36         started        signatures12 process13 dnsIp14 54 geoplugin.net 178.237.33.50, 49717, 80 ATOM86-ASATOM86NL Netherlands 30->54 56 email-server.xyz 216.250.253.13, 2990, 49716 AS-TIERP-19019US United States 30->56 92 Detected Remcos RAT 30->92 94 Contains functionalty to change the wallpaper 30->94 96 Contains functionality to steal Chrome passwords or cookies 30->96 98 3 other signatures 30->98 38 conhost.exe 34->38         started        40 conhost.exe 36->40         started        signatures15 process16
Score:
96%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
Base64 Block Base64 Payload Contains Base64 Block Executable PDB Path PE (Portable Executable)
Link:
https://app.malva.re/file/f109c83aeab0b5b6c22a66ea97973313
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17/
Verdict:
Malicious
Threat:
Script-JS.Trojan.Cbum
Link:
https://tip.neiki.dev/file/d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17
Threat name:
Script-JS.Trojan.ModiLoader
Create hunting rule
Status:
Malicious
First seen:
2025-07-15 10:55:08 UTC
File Type:
Text
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=2mdylbwucyyr6hepdub5mlz3isimb525niaxp7qqozijcmgvtmlq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
dbatloader
Create hunting rule
Similar samples:
3107d53f9e37c496f08e3742c379976a80f7297c192aba5b8eb7c5f29af18f33
RemcosRAT
5ddc67666eea4a860efdaf22ece623349f2428fda3b39f809d6b0db61d0f2f1b
RemcosRAT
70a92cdcd65bad4c5ed38adf340d5123944acde22d94c44df7ee8178f778d761
RemcosRAT
9f815d092ce88541533b5ea3ecfae952565254a152dc73b9e698a1d9a44b0e05
RemcosRAT
a9af5ddefd9b20204fab81b9bcda19ba06d32f010708c06d2d7de62773720ef8
RemcosRAT
c63dee86806da2bd0061973cd65f45f3a9326a42e843b5a0a5824e73ebf5916d
RemcosRAT
d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17
RemcosRAT
e570134f747cfd85ee052084f5a0dbc26b8a6ea12a262c8e67382235da072a63
RemcosRAT
ea7950a3761e0dbcf1c6e3e2a1167ea296d7986864a35bfd260bb6c0e00f4747
RemcosRAT
error
RemcosRAT
+ 4'127 additional samples on MalwareBazaar
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:modiloader discovery execution persistence trojan
Link:
https://tria.ge/reports/250715-m63mxsbn4y/
Behaviour
Runs ping.exe
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
ModiLoader Second Stage
ModiLoader, DBatLoader
Modiloader family
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/d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Invoke_Mimikatz
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects Invoke-Mimikatz String
Reference:https://github.com/clymb3r/PowerShell/tree/master/Invoke-Mimikatz
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked remcos malware samples.
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Malspam

RemcosRAT

Java Script (JS) js d3078586d416311f1c8f1d03d62f3b4490c0f75d6a0177fe1076509130d59b17

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments