MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4ccc8a0286b73b62f34fee2f3927c12a73aa47f272f40a4ba7085d84dc1785aa. 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 1 File information Comments
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SHA256 hash: 4ccc8a0286b73b62f34fee2f3927c12a73aa47f272f40a4ba7085d84dc1785aa
SHA3-384 hash: 84b812372e1c30bd133418b74de57a3c0a0e7619327b71cfd5705c97393c88e0f58eb75a4f1bbb4b163362549e39a1a6
SHA1 hash: 0ccf372db17a96c92485c46b751ac92a4bf8eddb
MD5 hash: f7c04cfc34d8683fe559faf3b4e22fad
humanhash: hydrogen-mexico-papa-montana
File name:Balance Invoice frm Astra.vbs
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'092 bytes
First seen:2022-03-15 14:24:56 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 24:IB/ogoJGAsC1fvBxfWgPqF0y1tbD9gKGBD:soDGAsCRvDJ4TQ
Threatray 10'063 similar samples on MalwareBazaar
TLSH T17811EB3C5E65F1D0A19BF18090091D0B2AD40C2FFD769829188B19B3B964AEC5C1E05B
Reporter abuse_ch
Tags:RemcosRAT vbs


Avatar
abuse_ch
Payload URL:
http://nbs.vizzhost.com/drop/185rms.jpg

Intelligence

File Origin
# of uploads :
1
# of downloads :
210
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/250913/
Detection(s):
SecuriteInfo.com.Trojan.VBS.SAgent.gen.29472.21319.UNOFFICIAL
Create hunting rule

Result
Verdict:
MALICIOUS
Details
Base64 Encoded URL
Detected an ANSI or UNICODE http:// or https:// base64 encoded URL prefix.
Empire PowerShell Request
Detected a base64 encoded Powershell HTTP request that is likely sourced from Empire.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/957275
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
Drops PE files with a suspicious file extension
Encrypted powershell cmdline option found
Hides threads from debuggers
Machine Learning detection for dropped file
Multi AV Scanner detection for domain / URL
PE file contains section with special chars
PowerShell case anomaly found
Powershell drops PE file
Query firmware table information (likely to detect VMs)
Sigma detected: Execution of Suspicious File Type Extension
Sigma detected: Suspicious Encoded PowerShell Command Line
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
VBScript performs obfuscated calls to suspicious functions
Wscript starts Powershell (via cmd or directly)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 589757 Sample: Balance Invoice frm Astra.vbs Startdate: 15/03/2022 Architecture: WINDOWS Score: 100 53 Multi AV Scanner detection for domain / URL 2->53 55 Antivirus detection for URL or domain 2->55 57 Antivirus detection for dropped file 2->57 59 7 other signatures 2->59 10 wscript.exe 1 2->10         started        13 itunes.exe 2->13         started        15 itunes.exe 2->15         started        process3 signatures4 65 VBScript performs obfuscated calls to suspicious functions 10->65 67 Wscript starts Powershell (via cmd or directly) 10->67 69 PowerShell case anomaly found 10->69 17 cmd.exe 1 10->17         started        71 Query firmware table information (likely to detect VMs) 13->71 73 Tries to detect sandboxes and other dynamic analysis tools (window names) 13->73 75 Machine Learning detection for dropped file 13->75 77 Hides threads from debuggers 15->77 79 Tries to detect sandboxes / dynamic malware analysis system (registry check) 15->79 process5 signatures6 47 Wscript starts Powershell (via cmd or directly) 17->47 49 Encrypted powershell cmdline option found 17->49 51 PowerShell case anomaly found 17->51 20 powershell.exe 14 21 17->20         started        25 conhost.exe 17->25         started        process7 dnsIp8 45 nbs.vizzhost.com 43.252.40.128, 49768, 80 OSSINI-AS-APOssiniPtyLtdAU China 20->45 39 C:\Users\user\AppData\...\www.microsoft.com, PE32 20->39 dropped 61 Drops PE files with a suspicious file extension 20->61 63 Powershell drops PE file 20->63 27 www.microsoft.com 4 4 20->27         started        file9 signatures10 process11 file12 41 C:\Users\user\AppData\Roaming\...\itunes.exe, PE32 27->41 dropped 43 C:\Users\user\AppData\Local\...\install.vbs, data 27->43 dropped 81 Query firmware table information (likely to detect VMs) 27->81 83 Machine Learning detection for dropped file 27->83 85 Hides threads from debuggers 27->85 87 Tries to detect sandboxes / dynamic malware analysis system (registry check) 27->87 31 cmd.exe 1 27->31         started        33 wscript.exe 27->33         started        signatures13 process14 process15 35 conhost.exe 31->35         started        37 reg.exe 1 31->37         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4ccc8a0286b73b62f34fee2f3927c12a73aa47f272f40a4ba7085d84dc1785aa/
Threat name:
Script-WScript.Trojan.PSRunner
Create hunting rule
Status:
Malicious
First seen:
2022-03-15 15:15:47 UTC
AV detection:
9 of 27 (33.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jtgiuaugw45wf42p5yxtsj6bfjz2ur7sol2aus5hbboyjxaxqwva._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
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RemcosRAT
+ 10'053 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:rh1 evasion persistence rat themida trojan
Link:
https://tria.ge/reports/220315-rrbywacfg5/
Behaviour
Modifies registry class
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Checks whether UAC is enabled
Checks BIOS information in registry
Checks computer location settings
Themida packer
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Remcos
UAC bypass
Malware Config
C2 Extraction:
185.29.9.125:2404
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4ccc8a0286b73b62f34fee2f3927c12a73aa47f272f40a4ba7085d84dc1785aa

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:PowerShell_Case_Anomaly
Create hunting rule
Author:Florian Roth
Description:Detects obfuscated PowerShell hacktools
Reference:https://twitter.com/danielhbohannon/status/905096106924761088

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

RemcosRAT

Visual Basic Script (vbs) vbs 4ccc8a0286b73b62f34fee2f3927c12a73aa47f272f40a4ba7085d84dc1785aa

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2098447/
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/250913/

Comments