MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650. 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: c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650
SHA3-384 hash: 98f3d2c5f8e48d9633f5d53220d853a07cc21a5221a65b3a6511c15446fc70112bc3a345a653adc0bb9388aec67152fd
SHA1 hash: 827c7267b03d555bdcc07683e69f10fb347fa525
MD5 hash: 3b3d9d0322bb89b4e0e8e868605dcf3a
humanhash: mobile-yellow-sad-item
File name:Adjunto_Serfinanza_0245084182603488863980883876_2418275459763568946922112_99778524626372181718320781_02236125131579763606_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'952'256 bytes
First seen:2020-11-20 07:57:37 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:p+rfolGGM5kvDcamevLpNjAu3or0Ze9mZkyB:9FSsbAu3orqk
Threatray 1'151 similar samples on MalwareBazaar
TLSH 9D956C05F884385FB99A54F04FDB56E892E235191571273D8CA369BCE60E08B7CEF872
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM10-MW2-obe.outbound.protection.outlook.com
Sending IP: 40.92.42.51
From: Factura virtual <facturavirtual14@outlook.es>
Subject: EXTRACTO SERFINANZA.
Attachment: Adjunto_Serfinanza_0245084182603488863980883876_2418275459763568946922112_99778524626372181718320781 (contains "Adjunto_Serfinanza_0245084182603488863980883876_2418275459763568946922112_99778524626372181718320781_02236125131579763606_pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
140
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
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
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/543883
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 signatures2 2 Behavior Graph ID: 321041 Sample: 3606_pdf.exe Startdate: 20/11/2020 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 Multi AV Scanner detection for submitted file 2->59 61 6 other signatures 2->61 10 3606_pdf.exe 2 2->10         started        13 PxxoServicesNet.exe 2 2->13         started        16 PxxoServicesNet.exe 2 2->16         started        process3 dnsIp4 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 18 3606_pdf.exe 4 5 10->18         started        21 WerFault.exe 23 9 10->21         started        23 WerFault.exe 10->23         started        53 192.168.2.1 unknown unknown 13->53 79 Hides threads from debuggers 13->79 81 Injects a PE file into a foreign processes 13->81 25 PxxoServicesNet.exe 13->25         started        27 WerFault.exe 13->27         started        29 PxxoServicesNet.exe 16->29         started        signatures5 process6 file7 45 C:\Users\user\AppData\...\PxxoServicesNet.exe, PE32 18->45 dropped 47 C:\...\PxxoServicesNet.exe:Zone.Identifier, ASCII 18->47 dropped 31 wscript.exe 1 18->31         started        49 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 21->49 dropped 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 4 other signatures 35->69 40 PxxoServicesNet.exe 35->40         started        43 WerFault.exe 35->43         started        process12 dnsIp13 51 databasepropersonombrecomercialideasearchwords.services 186.169.53.6, 7580 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 40->51
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650/
Threat name:
ByteCode-MSIL.Backdoor.Rescoms
Create hunting rule
Status:
Malicious
First seen:
2020-11-20 07:58:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
21 of 29 (72.41%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yu3ymchzfpmpt2ccctvzdropgp4gs6yi6b7xzl3pd3svhm72wzia._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
RemcosRAT
1b9cbd60298e5be7b6c5813a3c03bd423ae73364049848c44145b9c079fd0adc
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
b29880b2403337ef4fb3c644c4b033327cb6e2828d28799a0cc6a708cc0afaa4
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
RemcosRAT
ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
+ 1'141 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201120-3d45k5rxxe/
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
Executes dropped EXE
ServiceHost packer
Remcos
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:7580
Unpacked files
SH256 hash:
c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650
MD5 hash:
3b3d9d0322bb89b4e0e8e868605dcf3a
SHA1 hash:
827c7267b03d555bdcc07683e69f10fb347fa525
Link:
https://www.unpac.me/results/88eae5ab-3bc8-407d-b6f8-79cda1a30b6e/
SH256 hash:
d568c1b539e550ab0f7e5c669fde475a6afe598fd8c79e5b47827ac150767a79
MD5 hash:
a41d4e35e73d8db2658a16a965ec8ac4
SHA1 hash:
96fd2e43cd800f4cc7015485553ea0a3a7588197
Link:
https://www.unpac.me/results/88eae5ab-3bc8-407d-b6f8-79cda1a30b6e/
SH256 hash:
0d5c1e74b5a9065c114ef22818719dad56d995d017a7f1dc8086cf6eab709f72
MD5 hash:
27e4414aab9c7df3ca02f59ea4d058c7
SHA1 hash:
b3e9de9563908594240fe4c4c04fbb877be18ac8
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/88eae5ab-3bc8-407d-b6f8-79cda1a30b6e/
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 015dc32c567aa35f4f201c2d4fe20f7b94d9806bcc5254e57dcbf1cd806b01f9

RemcosRAT

Executable exe c5378608f92bd8f9e84214eb91c5cf33f8697b08f07f7caf6f1ee553b3fab650

(this sample)

  
Dropped by
MD5 23185de0a0d1c9fd0a821add18491483
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 015dc32c567aa35f4f201c2d4fe20f7b94d9806bcc5254e57dcbf1cd806b01f9

Comments