MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb. 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 9 File information Comments
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SHA256 hash: c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb
SHA3-384 hash: 584d1bb30024817302e8ca91a7f8b57daab78e4afb481074167c3bf11ecb93a6f1cddb2db58fab3914d16ec7cd7b4cd8
SHA1 hash: b3dec78c3642ccac9b851c42739f8303c5513951
MD5 hash: 9fe8183a8b73cd8f0a6462ff590aefb3
humanhash: georgia-seventeen-jupiter-juliet
File name:Factura Serfinanza_07333334324_62906820_122421665872145481_0242814_732782006747315187_255836870_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'136'640 bytes
First seen:2020-12-28 07:54:03 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'648 x Formbook, 12'245 x SnakeKeylogger)
ssdeep 12288:TfrDYBO08F6gvf/acJg4KqB98/+dFHk1kNhb9RWk85ksG6IQCTRpUhRlJopA5quN:XCCCCCKCCCCCKCCCCCKCCCCCKCCCCC
Threatray 1'284 similar samples on MalwareBazaar
TLSH 95355002498168CBD772D0B0A34DC2D6B38799CCE7EA5FD4AE20E25532CD477EBA9D41
Reporter abuse_ch
Tags:ESP exe geo Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM12-BN8-obe.outbound.protection.outlook.com
Sending IP: 40.92.21.52
From: JORGE LUIS MONTES MARTINEZ <jorgemontes63@outlook.com>
Subject: FACTURA EN MORA SERFINANZA.
Attachment: Factura Serfinanza_07333334324_62906820_122421665872145481_0242814_732782006747315187_255836870.tgz (contains "Factura Serfinanza_07333334324_62906820_122421665872145481_0242814_732782006747315187_255836870_pdf.exe")

RemcosRAT C2:
databasepropersonombrecomercialideasearchwords.services

Intelligence

File Origin
# of uploads :
1
# of downloads :
504
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Factura Serfinanza_07333334324_62906820_122421665872145481_0242814_732782006747315187_255836870_pdf.exe
Verdict:
Malicious activity
Analysis date:
2020-12-28 07:59:08 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/98d598ec-64c0-4ea7-a1aa-f6fd4778e049

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.tz.25957.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Deleting a recently created file
Running batch commands
Sending a UDP request
DNS request
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Connection attempt to an infection source
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/570570
Signature
.NET source code contains very large strings
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Detected Remcos RAT
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 334341 Sample: 6870_pdf.exe Startdate: 28/12/2020 Architecture: WINDOWS Score: 100 49 databasepropersonombrecomercialideasearchwords.services 2->49 53 Malicious sample detected (through community Yara rule) 2->53 55 Detected Remcos RAT 2->55 57 Yara detected Remcos RAT 2->57 59 4 other signatures 2->59 11 6870_pdf.exe 3 2->11         started        15 PxxoServicesTrialNet.exe 2 2->15         started        17 PxxoServicesTrialNet.exe 2->17         started        signatures3 process4 file5 45 C:\Users\user\AppData\...\6870_pdf.exe.log, ASCII 11->45 dropped 61 Contains functionalty to change the wallpaper 11->61 63 Contains functionality to steal Chrome passwords or cookies 11->63 65 Contains functionality to capture and log keystrokes 11->65 69 2 other signatures 11->69 19 6870_pdf.exe 4 5 11->19         started        67 Injects a PE file into a foreign processes 15->67 22 PxxoServicesTrialNet.exe 15->22         started        24 PxxoServicesTrialNet.exe 17->24         started        signatures6 process7 file8 41 C:\Users\user\...\PxxoServicesTrialNet.exe, PE32 19->41 dropped 43 PxxoServicesTrialNet.exe:Zone.Identifier, ASCII 19->43 dropped 26 wscript.exe 1 19->26         started        process9 process10 28 cmd.exe 1 26->28         started        process11 30 PxxoServicesTrialNet.exe 3 28->30         started        34 conhost.exe 28->34         started        file12 47 C:\Users\...\PxxoServicesTrialNet.exe.log, ASCII 30->47 dropped 71 Contains functionalty to change the wallpaper 30->71 73 Machine Learning detection for dropped file 30->73 75 Contains functionality to steal Chrome passwords or cookies 30->75 77 3 other signatures 30->77 36 PxxoServicesTrialNet.exe 2 4 30->36         started        39 PxxoServicesTrialNet.exe 30->39         started        signatures13 process14 dnsIp15 51 databasepropersonombrecomercialideasearchwords.services 186.169.72.153, 7680 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 36->51
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-12-28 07:55:04 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yrdu5q776adfi7yhevowsngyi3s2fgfjpi4k75ipzsk6slxj37fq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
3f1a2ec195c60a1f8789ac36368ae30a2b187858c957115bf88f40344bf0e6fa
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
RemcosRAT
c14895a7d0ca2633b565af7c08e77aef32397f4fdc78fd3560d2f23d89aa6d6a
RemcosRAT
e1865abf21c3b8f3b3d15e6c6e477468941f9e65700ceaaa0f4cb269d967c83e
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
f7e29cbf47c9804eb341836873ea6837be7a46639978f44d9ba2670d47e68d56
RemcosRAT
+ 1'274 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201228-vw9677k2kx/
Behaviour
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:7680
Unpacked files
SH256 hash:
c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb
MD5 hash:
9fe8183a8b73cd8f0a6462ff590aefb3
SHA1 hash:
b3dec78c3642ccac9b851c42739f8303c5513951
Link:
https://www.unpac.me/results/5004da23-1bcf-4a3d-9f98-e8b42df76325/
SH256 hash:
03fcf17b27cd7de59ff7568b9ab3d8d0cea3beaf697e880c6a5c0e23b280885e
MD5 hash:
9d77dcb2ff3cf9f0a99b3830f5e2a143
SHA1 hash:
0d84992479e88f31b9aa659a620eb6460a3b1bf8
Link:
https://www.unpac.me/results/5004da23-1bcf-4a3d-9f98-e8b42df76325/
SH256 hash:
82e33aa07a889435add02675311bb57a90fcdb88d1a0511704ccbac03f5cac86
MD5 hash:
4f06bdfe3ba1ca5201be6024f0de876e
SHA1 hash:
4ccb305583f974b313bddc03f9cad10ce84e7312
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/5004da23-1bcf-4a3d-9f98-e8b42df76325/
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/c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb

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:ach_RemcosRAT
Create hunting rule
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Malspam

RemcosRAT

rar 5f82cc4fd6c0de7d016e240113bb0d5583d13fb0d7562bdf1584ac8d7abc52e4

RemcosRAT

Executable exe c4474ec3fff006547f07255d6934d846e5a298a97a38aff50fcc95e92ee9dfcb

(this sample)

  
Dropped by
MD5 821114d817462bdc5a033ffa0a08a428
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 5f82cc4fd6c0de7d016e240113bb0d5583d13fb0d7562bdf1584ac8d7abc52e4

Comments