MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ea7caecf45fc75ba512efd3cf878800893c2a43ae66fc0a9a452687ba26c1025. 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: ea7caecf45fc75ba512efd3cf878800893c2a43ae66fc0a9a452687ba26c1025
SHA3-384 hash: 17cb7cb39e6a91c52450f3698391d8ddbf9545ab2742cbdfeff2ef080965603b3136b0338ecb31926244edea87d0290c
SHA1 hash: 82ca8a7f0cc21fdb8b9840254d9386a7bbb35ae6
MD5 hash: 4dfc3cf849a698f44db1e5599191e517
humanhash: maine-queen-dakota-california
File name:Cobro Juridico_0565048607_5104702_23918226873513229_945916769_9361784995141114_659091236144_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'082'944 bytes
First seen:2020-11-19 07:16:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'470 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:ae38uyqxs1liedtsqxescZu0/+bYXlOlr7UeAS0hvfFdEI:9YXtsIsUYAp0hvfd
Threatray 1'133 similar samples on MalwareBazaar
TLSH 86A54B14F895385F7A8A00F05FDB56E8E6D63518167027394C6768BCDA0E06B7CEF8B2
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT

Code Signing Certificate

Organisation:Dcffddafa
Issuer:Dcffddafa
Algorithm:sha256WithRSAEncryption
Valid from:Nov 18 22:08:30 2020 GMT
Valid to:Nov 18 22:08:30 2021 GMT
Serial number: A22362E865CEC23C299E8733AEE066EC
Thumbprint Algorithm:SHA256
Thumbprint: FE24ED87D83C1D1AE2A254A43FB9BCFD7394DA3D4930AF70722A79D2806FDD2B
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM12-DM6-obe.outbound.protection.outlook.com
Sending IP: 40.92.22.47
From: Marcela Villalobos Hurtado <marcela_villalobosh@hotmail.com>
Subject: COBRO JURIDICO SERFINANZA.
Attachment: Cobro Juridico_0565048607_5104702_23918226873513229_945916769_9361784995141114_659091236144.tgz (contains "Cobro Juridico_0565048607_5104702_23918226873513229_945916769_9361784995141114_659091236144_pdf.exe")

RemcosRAT C2:
databasepropersonombrecomercialideasearchwords.services:7580 (186.169.53.6)

Intelligence

File Origin
# of uploads :
1
# of downloads :
111
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 process from a recently created file
Creating a process with a hidden window
Creating a window
Launching the default Windows debugger (dwwin.exe)
Deleting a recently created file
Running batch commands
Creating a file
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/542417
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
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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 dnsIp2 2 Behavior Graph ID: 320305 Sample: Cobro Juridico_0565048607_5... Startdate: 19/11/2020 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 Detected Remcos RAT 2->60 62 8 other signatures 2->62 11 Cobro Juridico_0565048607_5104702_23918226873513229_945916769_9361784995141114_659091236144_pdf.exe 2 2->11         started        15 PxxoServicesNet.exe 2 2->15         started        17 PxxoServicesNet.exe 2 2->17         started        signatures3 process4 dnsIp5 54 192.168.2.1 unknown unknown 11->54 72 Hides threads from debuggers 11->72 74 Injects a PE file into a foreign processes 11->74 19 Cobro Juridico_0565048607_5104702_23918226873513229_945916769_9361784995141114_659091236144_pdf.exe 4 5 11->19         started        22 WerFault.exe 20 9 11->22         started        24 PxxoServicesNet.exe 15->24         started        26 WerFault.exe 15->26         started        28 PxxoServicesNet.exe 17->28         started        30 WerFault.exe 17->30         started        signatures6 process7 file8 46 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 19->46 dropped 48 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 19->48 dropped 32 wscript.exe 1 19->32         started        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 Detected unpacking (changes PE section rights) 36->64 66 Detected unpacking (overwrites its own PE header) 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 52 databasepropersonombrecomercialideasearchwords.services 186.169.53.6, 49713, 49716, 49718 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 41->52
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ea7caecf45fc75ba512efd3cf878800893c2a43ae66fc0a9a452687ba26c1025/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-11-19 07:17:06 UTC
File Type:
PE (.Net Exe)
AV detection:
19 of 29 (65.52%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5j6k5t2f7r23uujo7u6pq6eabcj4fjb24zx4bknekjuhxitmcasq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
RemcosRAT
1b9cbd60298e5be7b6c5813a3c03bd423ae73364049848c44145b9c079fd0adc
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4875f3562c4af57ea7bd8f6eecfc297784d9307cd7190a6aa44a0dffc21258c9
RemcosRAT
6274c01dd6783517a68267d2c6c2af38143ed35074cfc2372d8bc385a7c5f4e9
RemcosRAT
6c882aeb918e424cefe1068a6d3fbff5526c31e185716bf3a0d5ae0295772f09
RemcosRAT
936027b0c02941505eb900045a050c0806b30a8d49c7d34fff9eff42a8168b27
RemcosRAT
a1c644a64801c61e1649517c3debc28b194b4f9d43e1a99bc28724f652c3ca5e
RemcosRAT
b5ba143b36eb77a1899c07ef016155b3b7ef73b83456cadf534245896360b902
RemcosRAT
ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51
RemcosRAT
+ 1'123 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201119-53nxxvb9y6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetWindowsHookEx
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:
ea7caecf45fc75ba512efd3cf878800893c2a43ae66fc0a9a452687ba26c1025
MD5 hash:
4dfc3cf849a698f44db1e5599191e517
SHA1 hash:
82ca8a7f0cc21fdb8b9840254d9386a7bbb35ae6
Link:
https://www.unpac.me/results/3aa6e3ce-ee9e-444b-8692-e23be8defde4/
SH256 hash:
98c2281a14216c3c833696d9aa3d4ed5e2c0990870c1622b1021c71f3cddaea6
MD5 hash:
9f1ce6f85feb3ce3ef0500a0a38c835a
SHA1 hash:
1cfcf712ac8dca16c62c22570f5b7115cde8773d
Link:
https://www.unpac.me/results/3aa6e3ce-ee9e-444b-8692-e23be8defde4/
SH256 hash:
05d8d3202e02274cfbf988237e3d578e68678527dd921986f40fe3e354a9f45b
MD5 hash:
d9799bf881b1351164a70d02263bd0d1
SHA1 hash:
cd8c30f9a3fbdc18059b24fa6d5298dfaac5c56a
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/3aa6e3ce-ee9e-444b-8692-e23be8defde4/
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 d160d09d0b7fdf0752c103e25c74691f218a250d7bb6a75fcae3dee6e09a1b16

RemcosRAT

Executable exe ea7caecf45fc75ba512efd3cf878800893c2a43ae66fc0a9a452687ba26c1025

(this sample)

  
Dropped by
MD5 aa1c413928ac12d276a8fb303701f716
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 d160d09d0b7fdf0752c103e25c74691f218a250d7bb6a75fcae3dee6e09a1b16

Comments