MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761. 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: 13


Intelligence 13 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761
SHA3-384 hash: 948f546fc6f2029d5c44f44290fd6431915e00e445c663689ac6037d9f562a1f901f4f0fb051fb85ccc7acdc72978ca5
SHA1 hash: 451c9add3d28cb79b5f381608809e32667359b64
MD5 hash: d6a2aa124bb43a0f77c2ee4dab24a2ab
humanhash: pasta-stream-twenty-nineteen
File name:bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:231'568 bytes
First seen:2024-12-04 11:10:44 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 3072:XFIl7Pk0BU+Er0ixF52tvB4g90ExjbrlqLROv:q7c0q+vB4ZExjbr6Ov
TLSH T123346829E74F0955DF55AB7B025B4A4A09FCB73DF28100A0396C973837EDD2E4A2297C
Magika rtf
Reporter JAMESWT_WT
Tags:217-160-114-212 CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
140
Origin country :
IT IT
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761
Verdict:
No threats detected
Analysis date:
2024-12-04 11:14:07 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/71b0a48c-8431-4e8c-b347-54c62d0e3e1b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

TwinWave.EvilRTF.ObfusRunAway.20240409.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67503a0e12e85e185e75a2b3
Tags:
office xtreme gumen virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Sending an HTTP GET request
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a process with a hidden window
Launching a service
DNS request
Connection attempt 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/bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit obfuscated shellcode
Link:
https://www.filescan.io/uploads/675038c8815c124f1e5877e0/reports/d22fd0a8-e534-49bb-ac88-ef4a3e1fc01e/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1568169
Signature
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted 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
Shellcode detected
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Remcos
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
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)
Tries to steal Mail credentials (via file registry)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Generic Downloader
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1568169 Sample: cUxXrdUvYR.rtf Startdate: 04/12/2024 Architecture: WINDOWS Score: 100 47 Suricata IDS alerts for network traffic 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 19 other signatures 2->53 10 WINWORD.EXE 291 13 2->10         started        process3 process4 12 EQNEDT32.EXE 12 10->12         started        17 EQNEDT32.EXE 10->17         started        dnsIp5 45 217.160.114.212, 49165, 49167, 80 ONEANDONE-ASBrauerstrasse48DE Germany 12->45 37 C:\...\seethebestwaytogetbackgreatthingsw.vbS, Unicode 12->37 dropped 77 Office equation editor establishes network connection 12->77 79 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->79 19 wscript.exe 1 12->19         started        file6 signatures7 process8 signatures9 55 Suspicious powershell command line found 19->55 57 Wscript starts Powershell (via cmd or directly) 19->57 59 Windows Scripting host queries suspicious COM object (likely to drop second stage) 19->59 61 Suspicious execution chain found 19->61 22 powershell.exe 12 5 19->22         started        process10 dnsIp11 39 res.cloudinary.com 22->39 63 Installs new ROOT certificates 22->63 65 Writes to foreign memory regions 22->65 67 Injects a PE file into a foreign processes 22->67 26 CasPol.exe 3 13 22->26         started        signatures12 process13 dnsIp14 41 216.9.226.100, 3898, 49168, 49169 ATT-INTERNET4US Reserved 26->41 43 geoplugin.net 178.237.33.50, 49170, 80 ATOM86-ASATOM86NL Netherlands 26->43 69 Contains functionality to bypass UAC (CMSTPLUA) 26->69 71 Detected Remcos RAT 26->71 73 Tries to steal Mail credentials (via file registry) 26->73 75 8 other signatures 26->75 30 CasPol.exe 1 26->30         started        33 CasPol.exe 1 26->33         started        35 CasPol.exe 11 26->35         started        signatures15 process16 signatures17 81 Tries to steal Instant Messenger accounts or passwords 30->81 83 Tries to steal Mail credentials (via file / registry access) 30->83 85 Searches for Windows Mail specific files 30->85 87 Tries to harvest and steal browser information (history, passwords, etc) 33->87
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-12-03 19:38:37 UTC
File Type:
Document
Extracted files:
4
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xwun7bjxkmylmqrijho6obw4c37whj5peahcy5lvle4zazlko5qq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/241204-m99kmstmcv/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
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
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Command and Scripting Interpreter: PowerShell
Blocklisted process makes network request
Malware Config
Dropper Extraction:
https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/775b7a46-6cff-4ece-a52e-e93cef1e761d
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/bda8df853753/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.29
Link:
https://yomi.yoroi.company/submissions/bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761

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: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 bda8df85375330b6422849dde706dc16ff63a7af200e2c7575593990656a7761

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3319583/
  
Delivery method
Distributed via web download

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