MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf. 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: 10


Intelligence 10 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf
SHA3-384 hash: 9c757f0774915be4f971b345beb44d1402d2342964a3459f6a0de0e482e2bc2eda65c8d0eacb7f69e4bf2c4398311b5f
SHA1 hash: 9d8f204c5b9f6213940f6645c31e0d091a474e14
MD5 hash: e81d4c114b6ae13713428df5881475ba
humanhash: violet-august-california-failed
File name:Serfinanza_Adjunto_2629653511053881772570606389_0341837033667832816718_20890740873481754212180400_8679619701671447840714_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'073'744 bytes
First seen:2020-12-17 08:32:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'743 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:aMQvNVi51yzmBXoQ3qEXtA6E7NhP23z73ZmfqPyNKhlOdc:K0HmQaZhgzVmfq6NKhlOa
Threatray 1'232 similar samples on MalwareBazaar
TLSH 41A55A10F881355F7A8A40F09FEB56E8A1DA3419257117399C2368BCD90E19B7DEF8B3
Reporter abuse_ch
Tags:ESP exe geo Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM02-SN1-obe.outbound.protection.outlook.com
Sending IP: 40.92.5.53
From: info. Extracto <tesoreria14procolombia@outlook.es>
Subject: FACTURA EN MORA, REPORTE NEGATIVO EN DATACREDITO
Attachment: Serfinanza_Adjunto_2629653511053881772570606389_0341837033667832816718_20890740873481754212180400_86 (contains "Serfinanza_Adjunto_2629653511053881772570606389_0341837033667832816718_20890740873481754212180400_8679619701671447840714_pdf.exe")

RemcosRAT:
databasepropersonombrecomercialideasearchwords.services:7580 (186.169.37.63)

Intelligence

File Origin
# of uploads :
1
# of downloads :
104
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Adding an access-denied ACE
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
Sending a UDP request
Deleting a recently created file
Running batch commands
DNS request
Launching the default Windows debugger (dwwin.exe)
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:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/565086
Signature
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
Country aware sample found (crashes after keyboard check)
Detected Remcos RAT
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
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
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 331628 Sample: 0714_pdf.exe Startdate: 17/12/2020 Architecture: WINDOWS Score: 100 55 Multi AV Scanner detection for domain / URL 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 Detected Remcos RAT 2->59 61 5 other signatures 2->61 10 0714_pdf.exe 2 2->10         started        13 PxxoServicesNet.exe 2 2->13         started        15 PxxoServicesNet.exe 2 2->15         started        process3 signatures4 71 Contains functionality to steal Chrome passwords or cookies 10->71 73 Contains functionality to capture and log keystrokes 10->73 75 Contains functionality to inject code into remote processes 10->75 77 Contains functionality to steal Firefox passwords or cookies 10->77 17 0714_pdf.exe 4 5 10->17         started        20 WerFault.exe 23 9 10->20         started        79 Hides threads from debuggers 13->79 23 PxxoServicesNet.exe 13->23         started        25 WerFault.exe 13->25         started        27 PxxoServicesNet.exe 15->27         started        29 WerFault.exe 15->29         started        process5 dnsIp6 45 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 17->45 dropped 47 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 17->47 dropped 31 wscript.exe 1 17->31         started        51 192.168.2.1 unknown unknown 20->51 49 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 20->49 dropped file7 process8 process9 33 cmd.exe 1 31->33         started        process10 35 PxxoServicesNet.exe 2 33->35         started        38 conhost.exe 33->38         started        signatures11 63 Multi AV Scanner detection for dropped file 35->63 65 Machine Learning detection for dropped file 35->65 67 Contains functionality to steal Chrome passwords or cookies 35->67 69 3 other signatures 35->69 40 PxxoServicesNet.exe 2 4 35->40         started        43 WerFault.exe 35->43         started        process12 dnsIp13 53 databasepropersonombrecomercialideasearchwords.services 186.169.43.221, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 40->53
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-12-17 08:33:08 UTC
AV detection:
11 of 48 (22.92%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=3dkxmigw3jr5xx6heeggvzzbsqhjlzrparzqkpqjo4fcoy6ap3hq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
1254cc962e505f7cc85e165f51c7699013a4c36bd6495aff5f9ef24f6150cff1
RemcosRAT
15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
6c882aeb918e424cefe1068a6d3fbff5526c31e185716bf3a0d5ae0295772f09
RemcosRAT
a7bba5cba33b4320a78cd057e3cdd5169a86e90f6550e997772f4447549fd729
RemcosRAT
f412da03defe68cc6e1f264449adf519a4c5470c51e7b502854f7fbf358f8516
RemcosRAT
f43a96ccf1d23d7dda1abbc2bea16ecbb2fb43b2f05e4015ff69c02e2c144ab2
RemcosRAT
f7e29cbf47c9804eb341836873ea6837be7a46639978f44d9ba2670d47e68d56
RemcosRAT
+ 1'222 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201217-8vjse6vyq6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
ServiceHost packer
Remcos
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:7580
Unpacked files
SH256 hash:
d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf
MD5 hash:
e81d4c114b6ae13713428df5881475ba
SHA1 hash:
9d8f204c5b9f6213940f6645c31e0d091a474e14
Link:
https://www.unpac.me/results/d4080436-cc95-4c0b-9a93-7cb1b3d0c2a2/
SH256 hash:
a4ad1c8175331f84feccf89945289e67d4d953b89d2a0feb53f9de80475a6a29
MD5 hash:
d7faf6d10ec7f5e6f7b888af2d6d8b3b
SHA1 hash:
568f068fe969fb2b9d0b78948a5e65c46dffb5fa
Link:
https://www.unpac.me/results/d4080436-cc95-4c0b-9a93-7cb1b3d0c2a2/
SH256 hash:
c4e4f8291f761bf01468c2a5a7ea696ebed750a19ac3f47b156fc67679b05b88
MD5 hash:
79800bc76f5826ec0ed0a15cda9a1b1d
SHA1 hash:
d5bcd36b6637df184d6bae36f9dbf967b3881aff
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/d4080436-cc95-4c0b-9a93-7cb1b3d0c2a2/
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/d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf

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 fa7103d6e38400e2e90627b2a2dfe1e5d7e5488f270669eec9923ae3a0fab522

RemcosRAT

Executable exe d8d57620d6da63dbdfc7210c6ae721940e95e62f0473053e09770a2763c07ecf

(this sample)

  
Dropped by
MD5 1b31a08d2d92196ce30f52bd1d192016
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 fa7103d6e38400e2e90627b2a2dfe1e5d7e5488f270669eec9923ae3a0fab522

Comments