MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2. 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 1 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2
SHA3-384 hash: a5c249a5350adb1617525ff119e981ac04addc423c80c1319fb86ac054efba545f5be2466570c0edd83628df505c5099
SHA1 hash: 969255020b8e5b9cf16ffa6dd7c8f931e7b68ce7
MD5 hash: e677d8183d89a410a3ce59db5a2722d3
humanhash: equal-nineteen-fanta-football
File name:e677d8183d89a410a3ce59db5a2722d3
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:92'885 bytes
First seen:2024-07-19 07:02:40 UTC
Last seen:2024-07-19 07:55:51 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:Vgn/TJl/8FdlK+gqigv0C7xAlEM5jUbTMbyi9thdIhFRi2mnk0PKk6Ut6jvWdlKv:YuF22+iM5jZbyShdIjFJu2
TLSH T1C193DF59E78F41A1CF81A277031A0A8914FCB73EB70A12B575AC577837EEC2D40666BC
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
104
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2.zip
Verdict:
Malicious activity
Analysis date:
2024-07-19 20:38:03 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/14931f7a-205b-4318-9232-eaa6579682e8

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:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=669a0faeb302ab76f447f255
Tags:
Exploit Generic Office
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 to an infection source by exploiting the app vulnerability
Creating a file in the %AppData% directory
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Creating a process with a hidden window
Launching a service
Connection attempt to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/669a0fa8a59c11b474e97f6e/reports/1ad54dec-f896-412d-9ff1-92ff80a71ad9/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1476560
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
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: HackTool - CrackMapExec PowerShell Obfuscation
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Remcos
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Snort IDS alert for network traffic
Suspicious execution chain found
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Very long command line found
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 Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1476560 Sample: uM1zMBpd2h.rtf Startdate: 19/07/2024 Architecture: WINDOWS Score: 100 49 Snort IDS alert for network traffic 2->49 51 Multi AV Scanner detection for domain / URL 2->51 53 Found malware configuration 2->53 55 21 other signatures 2->55 9 WINWORD.EXE 291 13 2->9         started        process3 process4 11 EQNEDT32.EXE 12 9->11         started        16 EQNEDT32.EXE 9->16         started        dnsIp5 43 103.161.133.121, 49161, 49165, 80 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 11->43 33 C:\Users\...\butterburnverysweetgirleate.vBS, Unicode 11->33 dropped 83 Office equation editor establishes network connection 11->83 85 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->85 18 wscript.exe 11 11->18         started        file6 signatures7 process8 dnsIp9 37 pastecode.dev 18->37 39 pastecode.dev 172.66.40.229, 443, 49162 CLOUDFLARENETUS United States 18->39 57 System process connects to network (likely due to code injection or exploit) 18->57 59 Suspicious powershell command line found 18->59 61 Wscript starts Powershell (via cmd or directly) 18->61 63 5 other signatures 18->63 22 powershell.exe 12 5 18->22         started        signatures10 process11 dnsIp12 41 ia803405.us.archive.org 207.241.232.195, 443, 49163, 49164 INTERNET-ARCHIVEUS United States 22->41 65 Writes to foreign memory regions 22->65 67 Suspicious execution chain found 22->67 69 Injects a PE file into a foreign processes 22->69 26 RegAsm.exe 22->26         started        29 RegAsm.exe 3 13 22->29         started        signatures13 process14 dnsIp15 71 Contains functionality to bypass UAC (CMSTPLUA) 26->71 73 Contains functionality to steal Chrome passwords or cookies 26->73 75 Contains functionality to register a low level keyboard hook 26->75 81 2 other signatures 26->81 45 www.vandashproject.site 103.161.133.243, 2404, 49166 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 29->45 47 geoplugin.net 178.237.33.50, 49167, 80 ATOM86-ASATOM86NL Netherlands 29->47 35 C:\ProgramData\vandash\logs.dat, data 29->35 dropped 77 Detected Remcos RAT 29->77 79 Installs a global keyboard hook 29->79 file16 signatures17
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-07-18 19:45:20 UTC
File Type:
Document
Extracted files:
5
AV detection:
21 of 37 (56.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=k4c43wj33be2zrf7ygu2f6u3jrxz4sy52hn5ioyorm24gjiz23ja._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution
Link:
https://tria.ge/reports/240719-hvcj5s1frd/
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
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Blocklisted process makes network request
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/3b948b7c-6daf-473c-93ea-cef7e4211a20
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2

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 5705cdd93bd849acc4bfc1a9a2fa9b4c6f9e4b1dd1dbd43b0e8b35c32519d6d2

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3052266/

Comments


Avatar
zbet commented on 2024-07-19 07:02:42 UTC

url : hxxp://103.161.133.121/95095/TNB/hc.hc.hc.hc.hchchchch.doc