MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911
SHA3-384 hash: b276f80e331da1e52d2d1d20aa132a8ad1c954bbf6c482069cf78ca7ef10865c8decd1bca4a5cf6f32a59d219c61dc00
SHA1 hash: 7d56f5438cc32a1655e12021b3f74f03b4b15c73
MD5 hash: 80d443f86ee478fdbc57527723a00ba5
humanhash: dakota-foxtrot-iowa-sweet
File name:SERFINANZA_ADJUNTO_9695451573392712899247_2147161820426097673_187809811078594203505679279158_6666787508879385718216085_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'142'784 bytes
First seen:2020-12-28 08:02:03 UTC
Last seen:2020-12-28 09:29:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:bhIgOEPNlKf4kcf842VOFiEt+qF9buLtwDra31kdx+u4RxjY/27pOpyt+7h6AlMM:aCCCCCKCCCCCKCCCCCKCCCCCKCCCCC
Threatray 1'289 similar samples on MalwareBazaar
TLSH F3357102498168CBD772D0B0A34EC6D6B38799DCE7EA5FD4AE20E21532CD477EB69D40
Reporter abuse_ch
Tags:ESP exe geo Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM11-BN8-obe.outbound.protection.outlook.com
Sending IP: 40.92.20.67
From: info. Extracto <tesoreria39procolombia@outlook.es>
Subject: FACTURA EN MORA, REPORTE NEGATIVO EN DATACREDITO
Attachment: SERFINANZA_ADJUNTO_9695451573392712899247_2147161820426097673_187809811078594203505679279158_6666787 (contains "SERFINANZA_ADJUNTO_9695451573392712899247_2147161820426097673_187809811078594203505679279158_6666787508879385718216085_pdf.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
521
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
fe372aad-2911-456b-8f2d-d07a2711a5fc
Verdict:
Malicious activity
Analysis date:
2020-12-28 08:07:08 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/b1f049b2-511e-432c-9979-cf96cc5bb6c6

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.12461.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
Sending a UDP request
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
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
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/570590
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 334352 Sample: 6085_pdf.exe Startdate: 28/12/2020 Architecture: WINDOWS Score: 100 48 Multi AV Scanner detection for domain / URL 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 6 other signatures 2->54 10 6085_pdf.exe 3 2->10         started        14 PxxoServicesTrialNet.exe 2 2->14         started        16 PxxoServicesTrialNet.exe 2 2->16         started        process3 file4 42 C:\Users\user\AppData\...\6085_pdf.exe.log, ASCII 10->42 dropped 56 Contains functionalty to change the wallpaper 10->56 58 Contains functionality to steal Chrome passwords or cookies 10->58 60 Contains functionality to capture and log keystrokes 10->60 64 2 other signatures 10->64 18 6085_pdf.exe 4 5 10->18         started        62 Injects a PE file into a foreign processes 14->62 21 PxxoServicesTrialNet.exe 14->21         started        23 PxxoServicesTrialNet.exe 16->23         started        signatures5 process6 file7 38 C:\Users\user\...\PxxoServicesTrialNet.exe, PE32 18->38 dropped 40 PxxoServicesTrialNet.exe:Zone.Identifier, ASCII 18->40 dropped 25 wscript.exe 1 18->25         started        process8 process9 27 cmd.exe 1 25->27         started        process10 29 PxxoServicesTrialNet.exe 3 27->29         started        33 conhost.exe 27->33         started        file11 44 C:\Users\...\PxxoServicesTrialNet.exe.log, ASCII 29->44 dropped 66 Multi AV Scanner detection for dropped file 29->66 68 Contains functionalty to change the wallpaper 29->68 70 Machine Learning detection for dropped file 29->70 72 4 other signatures 29->72 35 PxxoServicesTrialNet.exe 2 4 29->35         started        signatures12 process13 dnsIp14 46 databasepropersonombrecomercialideasearchwords.services 186.169.72.153, 7680 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 35->46
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-12-28 01:14:01 UTC
AV detection:
17 of 28 (60.71%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ja6oxdsw26rrzkzopco5w56diedxacie2qfa3t3akuvvnjgd5eiq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
1069419faac2c4882be82f4887684652184d9a974a2bc7cf9444d80bfb0350f8
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
7fbc66a1484382bd80fc757b9b0fd0e27f47e99d0cccb5c6a101597af82593fa
RemcosRAT
c18f07d962d9753b946c6aa1b3af535f55c3cdc15e55fa647546a4cfd09796ca
RemcosRAT
dcbeec8679aa3888a03add3d6222cf2f9d2997a3221386f57ff3066ef4457465
RemcosRAT
e1865abf21c3b8f3b3d15e6c6e477468941f9e65700ceaaa0f4cb269d967c83e
RemcosRAT
ece0f92110b68a8d7cd1d4a3099011d26d57670923e9e20328def2553ab69cbc
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
+ 1'279 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-t3dvz93kkj/
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:
483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911
MD5 hash:
80d443f86ee478fdbc57527723a00ba5
SHA1 hash:
7d56f5438cc32a1655e12021b3f74f03b4b15c73
Link:
https://www.unpac.me/results/1358c837-0e96-4ae4-b0ad-8ebaff11739e/
SH256 hash:
0703e070f9f6ec9744e306c00ee0f09ef46dbe8a9a719b1356f1add14a93ba67
MD5 hash:
8845b131246354b7ac568b8c115cf930
SHA1 hash:
2a412a2b9a8a964d4baab686cebfa6c2233504c7
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/1358c837-0e96-4ae4-b0ad-8ebaff11739e/
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/483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911

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 0535b8a5939c41dcf958e1d2e950f05a3d505351141b457b8a1faafdc617b1aa

RemcosRAT

Executable exe 483ceb8e56d7a31cab2e789ddb77c34107700904d40a0dcf60552b56a4c3e911

(this sample)

  
Dropped by
MD5 f32a62a18b2b6cabbf2ff035899ca669
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 0535b8a5939c41dcf958e1d2e950f05a3d505351141b457b8a1faafdc617b1aa

Comments