MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887
SHA3-384 hash: 8742223a9e690df56be694e690ec135a5a8ed6cc5a887eba01a66b993b9aa8f54b3bce8a4c5ce9d8fd53d57c71c9f674
SHA1 hash: d539d90359d046b22fdcd4d0a9b4246af5b0aeb8
MD5 hash: edcd263f58a681981ae29c726928ff76
humanhash: pluto-seven-pennsylvania-xray
File name:edcd263f58a681981ae29c726928ff76
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:12'895 bytes
First seen:2022-11-12 08:49:59 UTC
Last seen:2022-11-12 11:37:06 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:ejOb5i6v/za1M3QY/MUIu0fucQRP/ox0UriK4zm3MSNrnTlZVjjXFaxLM:eQ5iU/za6AVUefuj399NkrxZlF4LM
TLSH T11B424B6CE9DB82A9CFDEA250531A2E8C572C7B6DA3C0A172367437711F53D229703874
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
F00015722EXpo.docx
Verdict:
Malicious activity
Analysis date:
2022-11-12 08:20:12 UTC
Tags:
opendir trojan exploit cve-2017-11882 loader rat remcos keylogger stealer
Link:
https://app.any.run/tasks/5937b070-189b-4ead-9925-ee240e478fa2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
Detection(s):
SecuriteInfo.com.Exploit.CVE-2017-11882.123.29941.7375.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Creating a process with a hidden window
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/636f5e405ae98d577068ddaf/reports/d6bb1642-e556-485b-acf7-919e6589cffd/overview
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1111778
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Searches for Windows Mail specific files
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 744474 Sample: 7gOVX1RUiO.rtf Startdate: 12/11/2022 Architecture: WINDOWS Score: 100 62 Multi AV Scanner detection for domain / URL 2->62 64 Malicious sample detected (through community Yara rule) 2->64 66 Antivirus detection for URL or domain 2->66 68 13 other signatures 2->68 9 EQNEDT32.EXE 12 2->9         started        14 Ynhycd.exe 1 2->14         started        16 Ynhycd.exe 2->16         started        18 2 other processes 2->18 process3 dnsIp4 56 35.178.245.215, 49181, 80 AMAZON-02US United States 9->56 48 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 9->48 dropped 50 C:\Users\Public\vbc.exe, PE32 9->50 dropped 90 Office equation editor establishes network connection 9->90 92 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 9->92 20 vbc.exe 1 3 9->20         started        94 Multi AV Scanner detection for dropped file 14->94 96 Machine Learning detection for dropped file 14->96 98 Encrypted powershell cmdline option found 14->98 24 powershell.exe 14->24         started        26 powershell.exe 16->26         started        file5 signatures6 process7 file8 46 C:\Users\user\AppData\Roaming\...\Ynhycd.exe, PE32 20->46 dropped 82 Multi AV Scanner detection for dropped file 20->82 84 Machine Learning detection for dropped file 20->84 86 Encrypted powershell cmdline option found 20->86 88 Injects a PE file into a foreign processes 20->88 28 vbc.exe 2 15 20->28         started        33 powershell.exe 6 20->33         started        signatures9 process10 dnsIp11 58 maz.mastercoa.co 192.30.89.67, 3444, 49182, 49183 CLOUDSINGULARITYCA Canada 28->58 60 geoplugin.net 178.237.33.50, 49185, 80 ATOM86-ASATOM86NL Netherlands 28->60 52 C:\Users\user\AppData\Local\Temp\dwn.exe, PE32 28->52 dropped 54 C:\ProgramData\remcos\logs.dat, data 28->54 dropped 100 Maps a DLL or memory area into another process 28->100 102 Installs a global keyboard hook 28->102 35 vbc.exe 1 28->35         started        38 dwn.exe 28->38         started        40 vbc.exe 1 28->40         started        42 vbc.exe 2 28->42         started        file12 signatures13 process14 signatures15 70 Tries to steal Instant Messenger accounts or passwords 35->70 72 Tries to steal Mail credentials (via file / registry access) 35->72 74 Searches for Windows Mail specific files 35->74 76 Machine Learning detection for dropped file 38->76 78 Encrypted powershell cmdline option found 38->78 44 powershell.exe 38->44         started        80 Tries to harvest and steal browser information (history, passwords, etc) 40->80 process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2022-11-12 08:50:10 UTC
File Type:
Document
Extracted files:
4
AV detection:
15 of 26 (57.69%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=aotylvtc7k4gmju7azjygfv5ayidvpwlfdyq4jxqfobnhzb2fcdq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection persistence rat spyware stealer
Link:
https://tria.ge/reports/221112-krlprahg2w/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
maz.mastercoa.co:3444
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/f5516f87-0380-4bd3-b1ce-368440326389
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/03a785d662fa/report/overview.html
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/03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887

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:INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.
Rule name:SUSP_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection

File information

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

Web download

RemcosRAT

Rich Text Format (RTF) rtf 03a785d662fab866269f06538316bd06103abecb28f10e26f02b82d3e43a2887

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2408690/

Comments


Avatar
zbet commented on 2022-11-12 08:50:06 UTC

url : hxxp://35.178.245.215/__________0000____________________000000_______________/_________000______.doc