MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9. 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: 8


Intelligence 8 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
SHA3-384 hash: 3242548e12c85337dd9fc14a5be91e6b320b82948bb6d9cac1f63ec1d9a8996e3c7c776fc196711305aa7c1570b463f1
SHA1 hash: ce96108d91da6e656e26d34238b78dea15bbabd3
MD5 hash: f2ed7ba4dca19884e2ec7d4b7c528abe
humanhash: bluebird-december-stairway-sad
File name:SERFINANZA_EXTRACTO_19768978168112539557746123_63962250059032645781378_8754399654516988247292837_8203103868379045761962_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'984'600 bytes
First seen:2020-11-20 07:50:49 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:toF1ts0qh0oWOSqKQ2ryf8gD2JyD9jddBl6wS/5C0:S+hD3N2+tZjdc/L
Threatray 1'152 similar samples on MalwareBazaar
TLSH 60956D14F845385F7A8B40F05FDB56E8A5DA3519167027398C63687CEA1E08B7CEF8B2
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT

Code Signing Certificate

Organisation:Bcedfffcaa
Issuer:Bcedfffcaa
Algorithm:sha256WithRSAEncryption
Valid from:Nov 19 20:23:18 2020 GMT
Valid to:Nov 19 20:23:18 2021 GMT
Serial number: 015563171EDFC13744794E90FDF7D6BA
Thumbprint Algorithm:SHA256
Thumbprint: 47AFC5A0B9D91E6C8214EC92BD941CE0133674EB57963AFB2E726A43375E5E5E
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM02-CY1-obe.outbound.protection.outlook.com
Sending IP: 40.92.4.96
From: info. Extracto <tesoreria013procolombia@outlook.es>
Subject: EXTRACTO SERFINANZA.
Attachment: SERFINANZA_EXTRACTO_19768978168112539557746123_63962250059032645781378_8754399654516988247292837_820 (contains "SERFINANZA_EXTRACTO_19768978168112539557746123_63962250059032645781378_8754399654516988247292837_8203103868379045761962_pdf.exe")

RemcosRAT C2:
databasepropersonombrecomercialideasearchwords.services:7580 (186.169.53.6)

Intelligence

File Origin
# of uploads :
1
# of downloads :
128
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Adding an access-denied ACE
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
DNS request
Connection attempt
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
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/543935
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
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
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 321064 Sample: 1962_pdf.exe Startdate: 20/11/2020 Architecture: WINDOWS Score: 100 54 Multi AV Scanner detection for domain / URL 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Detected Remcos RAT 2->58 60 5 other signatures 2->60 10 1962_pdf.exe 2 2->10         started        13 PxxoServicesNet.exe 2 2->13         started        15 PxxoServicesNet.exe 2 2->15         started        process3 signatures4 70 Contains functionality to steal Chrome passwords or cookies 10->70 72 Contains functionality to capture and log keystrokes 10->72 74 Contains functionality to inject code into remote processes 10->74 76 Contains functionality to steal Firefox passwords or cookies 10->76 17 1962_pdf.exe 4 5 10->17         started        20 WerFault.exe 23 9 10->20         started        78 Hides threads from debuggers 13->78 80 Injects a PE file into a foreign processes 13->80 22 PxxoServicesNet.exe 13->22         started        24 PxxoServicesNet.exe 13->24         started        26 WerFault.exe 13->26         started        28 PxxoServicesNet.exe 15->28         started        30 WerFault.exe 15->30         started        process5 file6 46 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 17->46 dropped 48 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 17->48 dropped 32 wscript.exe 1 17->32         started        50 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 20->50 dropped process7 process8 34 cmd.exe 1 32->34         started        process9 36 PxxoServicesNet.exe 2 34->36         started        39 conhost.exe 34->39         started        signatures10 62 Machine Learning detection for dropped file 36->62 64 Contains functionality to steal Chrome passwords or cookies 36->64 66 Contains functionality to capture and log keystrokes 36->66 68 3 other signatures 36->68 41 PxxoServicesNet.exe 36->41         started        44 WerFault.exe 36->44         started        process11 dnsIp12 52 databasepropersonombrecomercialideasearchwords.services 186.169.53.6, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 41->52
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-11-19 23:31:42 UTC
File Type:
PE (.Net Exe)
AV detection:
20 of 29 (68.97%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xc6phjm3rgzoxqh3pt52l6hxe3pihmekzudswvofk7hytulccdeq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
13efba52e6268bbc8089e143010d3e9be11ef8c7606a6ecd32b36e9ff60d1bde
RemcosRAT
2123aaf55e2f25a5162c742f31d52ef92dab582db297a8a3f246741ab0cccf74
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
58d5f679e704a0814342eb3a02eaf780d737c6456e5ae070986330db2fa6dd18
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
a0642205ff1e99b61822f71e22da22cc91ecbde456dd2453f81084bc22547e9d
RemcosRAT
d7e339a5a02ec396fb568be9485047caccf6cc9ac85a8a6448410ed26a75f7e7
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
+ 1'142 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201120-b72btlqnma/
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:
a9be5373b53e4f374611f894f6f59cac3f4dd4868d424556675049cd5e4fc535
MD5 hash:
393349247912fd31fbafe51cb7b558ef
SHA1 hash:
2d745edb1d0b0a8a7c842734c7fa30f03e7a3c53
Link:
https://www.unpac.me/results/a51b748c-0d4b-49e4-990a-caa9a9203d9e/
SH256 hash:
87c208b7a4abffc2120061f3abc5ca591ea3f69b92e862ad4035aae768dd16b1
MD5 hash:
828ae1db2ca678f6f59167d8fcf6e744
SHA1 hash:
85a650a85cd889af65d306dcb54d6431907c94bb
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/a51b748c-0d4b-49e4-990a-caa9a9203d9e/
SH256 hash:
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
MD5 hash:
f2ed7ba4dca19884e2ec7d4b7c528abe
SHA1 hash:
ce96108d91da6e656e26d34238b78dea15bbabd3
Link:
https://www.unpac.me/results/a51b748c-0d4b-49e4-990a-caa9a9203d9e/
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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 eb259ce7b5b27617fca5b4815aabe5dd79a99311b4f9ea766796ddfb7fc26fc8

RemcosRAT

Executable exe b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9

(this sample)

  
Dropped by
MD5 bfe4b568c57d6d56fc67e267c21af958
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 eb259ce7b5b27617fca5b4815aabe5dd79a99311b4f9ea766796ddfb7fc26fc8

Comments