MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608. 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: 4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
SHA3-384 hash: 3d1682db6853bc917974555266a4b8ff956b8ee8899555247844b0df0ad9cdc1d7d197155dd3a64616c9614d6fba4d83
SHA1 hash: a66eda4ec57482be828df189401e0e4a0b81a0ce
MD5 hash: dd1d460392017ea2bb0ab4a5526ab0a4
humanhash: charlie-alpha-eighteen-leopard
File name:Cobro Juridico_08488786443_3691572_194632407966235_6136920_55536685115578730658_3718623235_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'000'528 bytes
First seen:2020-11-20 07:55:36 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:NWfG+PucJOUzAQ7GUvPg3SqRqEm7Q7gth+zzx7bR:2GdcfcQ5P5Ix
Threatray 1'152 similar samples on MalwareBazaar
TLSH E9956B25F854385F799A00F15FDB96E896DA3118163417399C6378BCEA0E04B7CEF8B2
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT

Code Signing Certificate

Organisation:Bfacbbdccbfcfbff
Issuer:Bfacbbdccbfcfbff
Algorithm:sha256WithRSAEncryption
Valid from:Nov 19 20:33:18 2020 GMT
Valid to:Nov 19 20:33:18 2021 GMT
Serial number: 529B5C89E2719F47412C4BA77559464C
Thumbprint Algorithm:SHA256
Thumbprint: 8B4985D9B6676E65A6B636DAAEA900613AA28B1AF7E8CBCBFA5C4FEDEA90D270
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM10-BN7-obe.outbound.protection.outlook.com
Sending IP: 40.92.40.94
From: gabriel arango hernandez <gabrielarangohernandez@hotmail.com>
Subject: COBRO JURIDICO SERFINANZA.
Attachment: Cobro Juridico_08488786443_3691572_194632407966235_6136920_55536685115578730658_3718623235.tgz (contains "Cobro Juridico_08488786443_3691572_194632407966235_6136920_55536685115578730658_3718623235_pdf.exe")

RemcosRAT C2:
databasepropersonombrecomercialideasearchwords.services:7580 (186.169.53.6)

Intelligence

File Origin
# of uploads :
1
# of downloads :
134
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
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
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
Gathering data
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/543908
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
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 dnsIp2 2 Behavior Graph ID: 321051 Sample: Cobro Juridico_08488786443_... Startdate: 20/11/2020 Architecture: WINDOWS Score: 100 50 databasepropersonombrecomercialideasearchwords.services 2->50 56 Multi AV Scanner detection for domain / URL 2->56 58 Malicious sample detected (through community Yara rule) 2->58 60 Multi AV Scanner detection for submitted file 2->60 62 10 other signatures 2->62 11 Cobro Juridico_08488786443_3691572_194632407966235_6136920_55536685115578730658_3718623235_pdf.exe 2 2->11         started        14 PxxoServicesNet.exe 2 2->14         started        16 PxxoServicesNet.exe 2 2->16         started        signatures3 process4 signatures5 72 Hides threads from debuggers 11->72 18 Cobro Juridico_08488786443_3691572_194632407966235_6136920_55536685115578730658_3718623235_pdf.exe 4 5 11->18         started        21 WerFault.exe 23 9 11->21         started        74 Injects a PE file into a foreign processes 14->74 23 WerFault.exe 14->23         started        26 PxxoServicesNet.exe 14->26         started        28 PxxoServicesNet.exe 16->28         started        30 WerFault.exe 16->30         started        process6 dnsIp7 46 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 18->46 dropped 48 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 18->48 dropped 32 wscript.exe 1 18->32         started        52 192.168.2.1 unknown unknown 23->52 file8 process9 process10 34 cmd.exe 1 32->34         started        process11 36 PxxoServicesNet.exe 2 34->36         started        39 conhost.exe 34->39         started        signatures12 64 Multi AV Scanner detection for dropped file 36->64 66 Machine Learning detection for dropped file 36->66 68 Contains functionality to steal Chrome passwords or cookies 36->68 70 4 other signatures 36->70 41 PxxoServicesNet.exe 36->41         started        44 WerFault.exe 36->44         started        process13 dnsIp14 54 databasepropersonombrecomercialideasearchwords.services 186.169.53.6, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 41->54
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-11-20 07:56:08 UTC
File Type:
PE (.Net Exe)
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jkklayw3xhpzibjacrwradpvwamxsxipkcgxxke5etvrq4s6cyea._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
13efba52e6268bbc8089e143010d3e9be11ef8c7606a6ecd32b36e9ff60d1bde
RemcosRAT
2123aaf55e2f25a5162c742f31d52ef92dab582db297a8a3f246741ab0cccf74
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
58d5f679e704a0814342eb3a02eaf780d737c6456e5ae070986330db2fa6dd18
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
a0642205ff1e99b61822f71e22da22cc91ecbde456dd2453f81084bc22547e9d
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
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-mbbacnexgj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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:
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
MD5 hash:
dd1d460392017ea2bb0ab4a5526ab0a4
SHA1 hash:
a66eda4ec57482be828df189401e0e4a0b81a0ce
Link:
https://www.unpac.me/results/e3272375-cd0d-45e9-99ad-15e2c454326d/
SH256 hash:
20cb95b60c18d1b08ca74491fdef64db9487b5c66b077085e35b3184253cd5f8
MD5 hash:
ac7b6f1a2c26de5a57b94c9c14e21771
SHA1 hash:
45798bc23ae5a4a6849780ad6c6c597efbb568c2
Link:
https://www.unpac.me/results/e3272375-cd0d-45e9-99ad-15e2c454326d/
SH256 hash:
a288b8ab718dbabde237fd349cd209aa892a4278fc95df7e4a5f3f1f80deaf94
MD5 hash:
54efe68f2449c5a7d9018336952a0f3b
SHA1 hash:
8a11f83d7bf1bf3a31f500a7d89bbbb77acb1cf2
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/e3272375-cd0d-45e9-99ad-15e2c454326d/
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 4682a57786cd783f5d88c3c9a0def62eca8655eef3046471126a16826c9b567b

RemcosRAT

Executable exe 4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608

(this sample)

  
Dropped by
MD5 2bdc2b8d7ec27f0c5275e8aa79bf32fa
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 4682a57786cd783f5d88c3c9a0def62eca8655eef3046471126a16826c9b567b

Comments