MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd
SHA3-384 hash: ba165c8b84f18d7a5d457fe7ee1243f9bc6400edace71ba6c04484525f65930bb8cfaeeb998296c34badbcdbb0716226
SHA1 hash: a4c46174dba0932f99ae238f823a4c2ea7628ebe
MD5 hash: 323ac449e186a684bb9b155922799b50
humanhash: fish-purple-uniform-salami
File name:scan0010125pdf.gz
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:846'428 bytes
First seen:2025-10-21 07:08:39 UTC
Last seen:Never
File type: zip
MIME type:application/zip
ssdeep 24576:pJ8p/hoZoe1WIgSAEcrk+Q+AV5ynuuNrhIA5KDZYs5nUE2:pJnFNQrk+Q+I5ynuuNyPZD5UE2
TLSH T1CE0533281F92AE420DBBD95903FB723D7053AA87DEECA5C5817E523362A1BCC34605F1
Magika zip
Reporter cocaman
Tags:gz RemcosRAT zip


Avatar
cocaman
Malicious email (T1566.001)
From: "Michale (TSUBASA) <andi@glamsio.com>" (likely spoofed)
Received: "from slyly.glamsio.com (slyly.glamsio.com [94.156.175.204]) "
Date: "20 Oct 2025 20:26:47 -0700"
Subject: "Order Confirmation"
Attachment: "scan0010125pdf.gz"

Intelligence

File Origin
# of uploads :
1
# of downloads :
127
Origin country :
CH CH
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:scan10125.exe
File size:930'544 bytes
SHA256 hash: c3522c969c29c162a1b67b62b26510edfe67c8c163cbd9addea347dd229090af
MD5 hash: 4cfe59591a7403c15fbac3d2a64f9ebe
MIME type:application/x-dosexec
Signature RemcosRAT
Vendor Threat Intelligence
Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68f71ecb3edd081eba404420
Tags:
dropper virus blic
Result
Verdict:
Unknown
File Type:
PE File
Link:
https://app.docguard.net/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd/results/dashboard
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/68f731b53a79800405edbaf9/reports/fc9f6a35-7ad5-4659-9477-0f066af7461e/overview
Verdict:
Suspicious
Labled as:
Trojan.U.GuLoader
Link:
https://www.hybrid-analysis.com/sample/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd
Verdict:
Malicious
File Type:
zip
First seen:
2025-10-20T18:28:00Z UTC
Last seen:
2025-10-21T04:17:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd/results?tab=lookup
Score:
84%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd
Verdict:
inconclusive
YARA:
3 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Zip Archive
Link:
https://app.malva.re/file/323ac449e186a684bb9b155922799b50
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Suspicious
First seen:
2025-10-21 02:57:00 UTC
File Type:
Binary (Archive)
Extracted files:
44
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yzvgg7pjrc7sv3ic6z3rj3qsgjfhaycskzmcztjhpifj5n2iktoq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos collection discovery downloader persistence rat
Link:
https://tria.ge/reports/251021-np3r2ahv3a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
196.251.70.45:2404
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.48
Link:
https://yomi.yoroi.company/submissions/c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd

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:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Malspam

RemcosRAT

zip c66a637de988bf2aed02f67714ee12324a70605256582ccd277a0a9eb74854dd

(this sample)

RemcosRAT

Executable exe c3522c969c29c162a1b67b62b26510edfe67c8c163cbd9addea347dd229090af

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 c3522c969c29c162a1b67b62b26510edfe67c8c163cbd9addea347dd229090af
  
Dropping
RemcosRAT
  
Dropping
MD5 4cfe59591a7403c15fbac3d2a64f9ebe

Comments