MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 96bf0039c8086e96b175fc8c5d09bd6ebb70c40a7f3a00293eebe287da4ecc8c. 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: 6


Maldoc score: 8


Intelligence 6 IOCs YARA 13 File information Comments
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SHA256 hash: 96bf0039c8086e96b175fc8c5d09bd6ebb70c40a7f3a00293eebe287da4ecc8c
SHA3-384 hash: 5f8ae90d839043d41362292be55b39a9d98f4e82683ebeeef72b96eef1b85fa15f1f8838cc744f5fd4bcb7af110ee8d0
SHA1 hash: 34b83031b8bcbfeb820fa65a09f6e480a4f430b0
MD5 hash: 06278f61fb1e92e3f197930234fa6eb8
humanhash: cola-diet-jersey-indigo
File name:Remittance Details.xls
Download: download sample
Signature RemcosRAT
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File size:450'560 bytes
First seen:2020-11-19 08:01:01 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:Qk3hOdsylKlgxopeiBNhZF+E+W2kdAsoCbk1cVVXVKJKYWX36lvpxtZcEfz0/B9D:FhZh3cpFL0/WuYzqD0VlU9Z
TLSH 29A41413E7409837F129017575D3659355266C333B22CE2A2AC3B69FABBBFA0AD31C51
Reporter abuse_ch
Tags:nVpn RAT RemcosRAT WellsFargo xls


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: rdns3.nedsare.xyz
Sending IP: 46.105.190.71
From: Wells Fargo Electronic Remittance System <paymentremittanceinformation@remit-wellsfargo.com>
Subject: Wells Fargo Remittance Advice for Vendor -- Port City Group : Paper document number - 9130105250
Attachment: Remittance Details.xls

RemcosRAT C2:
jimmy101.myq-see.com:2050 (185.140.53.184)

Pointing to nVpn:

% Information related to '185.140.53.0 - 185.140.53.255'

% Abuse contact for '185.140.53.0 - 185.140.53.255' is 'abuse@privacyfirst.sh'

inetnum: 185.140.53.0 - 185.140.53.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-EU
country: EU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2016-10-17T23:24:00Z
last-modified: 2020-11-06T23:02:44Z
source: RIPE

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 8
Application name is Microsoft Excel
Office document is in OLE format
Office document contains VBA Macros
OLE dump

MalwareBazaar was able to identify 19 sections in this file using oledump:

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
4423523 bytesWorkbook
597 bytes_VBA_PROJECT_CUR/LYNNa/CompObj
6262 bytes_VBA_PROJECT_CUR/LYNNa/VBFrame
738 bytes_VBA_PROJECT_CUR/LYNNa/f
80 bytes_VBA_PROJECT_CUR/LYNNa/o
9534 bytes_VBA_PROJECT_CUR/PROJECT
1080 bytes_VBA_PROJECT_CUR/PROJECTwm
111831 bytes_VBA_PROJECT_CUR/VBA/LYNNa
124111 bytes_VBA_PROJECT_CUR/VBA/Sheet1
131479 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
143816 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
152179 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
16307 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
17714 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
18342 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
19823 bytes_VBA_PROJECT_CUR/VBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecWorkbook_ActivateRuns when the Excel Workbook is opened
AutoExecWorksheet_ChangeRuns when the file is opened and ActiveX objects trigger events
SuspiciousCreateMay execute file or a system command through WMI
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
129
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
TwinWave.EvilDoc.FuncProcessAGoGo.20200805.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Running batch commands
DNS request
Sending an HTTP GET request
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a process with a hidden window
Creating a file
Launching a process
Creating a file in the %AppData% subdirectories
Possible injection to a system process
Setting a global event handler for the keyboard
Sending a TCP request to an infection source
Launching a process by exploiting the app vulnerability
Unauthorized injection to a system process
Result
Gathering data
Result
Threat name:
Remcos
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/542435
Signature
Allocates memory in foreign processes
Command shell drops VBS files
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates processes via WMI
Detected Remcos RAT
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Suspicious Svchost Process
Suspicious powershell command line found
Very long command line found
Writes or reads registry keys via WMI
Writes registry values via WMI
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Powershell dedcode and execute
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 320325 Sample: Remittance Details.xls Startdate: 19/11/2020 Architecture: WINDOWS Score: 100 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 Detected Remcos RAT 2->55 57 9 other signatures 2->57 7 powershell.exe 7 2->7         started        11 cmd.exe 2->11         started        13 powershell.exe 7 2->13         started        15 7 other processes 2->15 process3 dnsIp4 45 augustair.com 7->45 73 Writes to foreign memory regions 7->73 75 Injects a PE file into a foreign processes 7->75 18 control.exe 7->18         started        77 Suspicious powershell command line found 11->77 79 Obfuscated command line found 11->79 22 powershell.exe 12 7 11->22         started        47 augustair.com 13->47 24 control.exe 13->24         started        49 augustair.com 15->49 39 C:\Users\user\AppData\Local\...\firewall.vbs, ASCII 15->39 dropped 81 Command shell drops VBS files 15->81 26 control.exe 15->26         started        file5 signatures6 process7 dnsIp8 41 jimmy101.myq-see.com 185.140.53.184, 2050, 49169 DAVID_CRAIGGG Sweden 18->41 59 Contains functionality to steal Chrome passwords or cookies 18->59 61 Contains functionality to capture and log keystrokes 18->61 63 Contains functionality to inject code into remote processes 18->63 65 5 other signatures 18->65 28 svchost.exe 18->28         started        30 svchost.exe 18->30         started        32 svchost.exe 18->32         started        34 svchost.exe 18->34         started        43 augustair.com 206.130.99.140, 49165, 49166, 49167 WESTHOSTUS United States 22->43 36 wscript.exe 22->36         started        signatures9 process10 signatures11 67 Creates processes via WMI 36->67 69 Writes or reads registry keys via WMI 36->69 71 Writes registry values via WMI 36->71
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/96bf0039c8086e96b175fc8c5d09bd6ebb70c40a7f3a00293eebe287da4ecc8c/
Threat name:
Win32.Trojan.RemcosRAT
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Status:
Malicious
First seen:
2020-11-19 00:18:37 UTC
AV detection:
16 of 29 (55.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=s27qaooibbxjnmlv7sgf2cn5n25xbrakp45aakj65pripwsozsga._file
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos macro rat
Link:
https://tria.ge/reports/201119-3ms5ls4tqa/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Suspicious use of FindShellTrayWindow
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Suspicious use of SetThreadContext
Blacklisted process makes network request
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
jimmy101.myq-see.com:2050
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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
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:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria
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

Excel file xls 96bf0039c8086e96b175fc8c5d09bd6ebb70c40a7f3a00293eebe287da4ecc8c

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments