MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5. 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: 843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5
SHA3-384 hash: b93b842d523287f150943c9b0ccb5acd344686699a80b79e68be6c82df192a9322709e6d12726489fa5fc6bb0ec018c8
SHA1 hash: 72788a2b8616994cccb0153a7ca6c6d8c18c25e7
MD5 hash: e599328c1b6b637ebc83d153de159d26
humanhash: shade-equal-alpha-high
File name:ADJUNTO_EXTRACTO_8480077866388612005935_483837068728927904754625846_641381686385369272964540_0047083647940737112691_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'830'912 bytes
First seen:2020-11-26 06:41:15 UTC
Last seen:2020-11-26 08:42:41 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 24576:50JjpoECLryYs6W+x0j3B7ZtEmXsN8Mr1+I:Srjx7ZtEf8e1+
Threatray 1'173 similar samples on MalwareBazaar
TLSH 74856B10BC40305FBAAA41B49EE752F891EB311515741B3A5C636DBCCA1E18BBDDF8B2
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM11-CO1-obe.outbound.protection.outlook.com
Sending IP: 40.92.18.74
From: info. Extracto <electromacltda58@outlook.es>
Subject: EXTRACTO SERFINANZA.
Attachment: ADJUNTO_EXTRACTO_8480077866388612005935_483837068728927904754625846_641381686385369272964540_0047083 (contains "ADJUNTO_EXTRACTO_8480077866388612005935_483837068728927904754625846_641381686385369272964540_0047083647940737112691_pdf.exe")

RemcosRAT C2:
databasepropersonombrecomercialideasearchwords.services:7580 (186.169.81.240)

Intelligence

File Origin
# of uploads :
2
# of downloads :
135
Origin country :
n/a
Vendor Threat Intelligence
Gathering data
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
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/547826
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
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 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: 323017 Sample: 2691_pdf.exe Startdate: 26/11/2020 Architecture: WINDOWS Score: 100 56 Malicious sample detected (through community Yara rule) 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 Detected Remcos RAT 2->60 62 4 other signatures 2->62 10 2691_pdf.exe 3 2->10         started        14 PxxoServicesNet.exe 2 2->14         started        16 PxxoServicesNet.exe 2 2->16         started        process3 file4 52 C:\Users\user\AppData\...\2691_pdf.exe.log, ASCII 10->52 dropped 72 Contains functionality to steal Chrome passwords or cookies 10->72 74 Contains functionality to capture and log keystrokes 10->74 76 Contains functionality to inject code into remote processes 10->76 78 Contains functionality to steal Firefox passwords or cookies 10->78 18 2691_pdf.exe 4 5 10->18         started        21 2691_pdf.exe 10->21         started        80 Injects a PE file into a foreign processes 14->80 23 PxxoServicesNet.exe 14->23         started        25 PxxoServicesNet.exe 14->25         started        27 PxxoServicesNet.exe 14->27         started        29 PxxoServicesNet.exe 14->29         started        31 PxxoServicesNet.exe 16->31         started        signatures5 process6 file7 46 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 18->46 dropped 48 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 18->48 dropped 33 wscript.exe 1 18->33         started        process8 process9 35 cmd.exe 1 33->35         started        process10 37 PxxoServicesNet.exe 3 35->37         started        41 conhost.exe 35->41         started        file11 50 C:\Users\user\...\PxxoServicesNet.exe.log, ASCII 37->50 dropped 64 Multi AV Scanner detection for dropped file 37->64 66 Machine Learning detection for dropped file 37->66 68 Contains functionality to steal Chrome passwords or cookies 37->68 70 3 other signatures 37->70 43 PxxoServicesNet.exe 2 4 37->43         started        signatures12 process13 dnsIp14 54 databasepropersonombrecomercialideasearchwords.services 186.169.81.240, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 43->54
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-11-26 06:42:08 UTC
File Type:
PE (.Net Exe)
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qqzsn2fkxwuaewlvvzk6nu3pzwf3phrodjpsl2ddao4c6fwdxlcq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
b29880b2403337ef4fb3c644c4b033327cb6e2828d28799a0cc6a708cc0afaa4
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
RemcosRAT
c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650
RemcosRAT
ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
+ 1'163 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201126-ktlhgr5p3j/
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:7580
Unpacked files
SH256 hash:
843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5
MD5 hash:
e599328c1b6b637ebc83d153de159d26
SHA1 hash:
72788a2b8616994cccb0153a7ca6c6d8c18c25e7
Link:
https://www.unpac.me/results/c7110503-5c44-4b62-807b-78f2b0cae0a9/
SH256 hash:
b0682076a72a18f318f7cc6195bf3a4ea0385e78685fe6b3c959d5e4e4474e71
MD5 hash:
dc04a58eea3058459668929954063c07
SHA1 hash:
1d9f907d64e7c3546b43495bcbca602c2749fcc9
Link:
https://www.unpac.me/results/c7110503-5c44-4b62-807b-78f2b0cae0a9/
SH256 hash:
d39fbbb35463eca149e3f82432b8a023af91957701e529a4e884de306bfc9dc3
MD5 hash:
fb45a56000fdcbe6614b734608923b03
SHA1 hash:
9af72047c33cad6e0920dbb47826f5e039d6ebe2
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/c7110503-5c44-4b62-807b-78f2b0cae0a9/
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 5231bb04e4fe0a1e36fd4b94f31a761460ab4eea4abf85edef62d8d33e172efc

RemcosRAT

Executable exe 843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5

(this sample)

  
Dropped by
MD5 b466030d6e23728f300f62c71054e238
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 5231bb04e4fe0a1e36fd4b94f31a761460ab4eea4abf85edef62d8d33e172efc
Cape
Cape
https://www.capesandbox.com/analysis/105593/

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