MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866
SHA3-384 hash: f1724ca7c8adb6a04fdc3b69e3e04ad519b959a913fbd83d0f1a6c170ad325a9ae2f03502066d86171a8b5c7752d6658
SHA1 hash: 0a3734ee93c07b5f7c78766af2af63bb75984856
MD5 hash: 28d95412db3a011684784953657efd12
humanhash: double-football-river-salami
File name:SecuriteInfo.com.Exploit.CVE-2017-11882.123.11787.15148
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:93'401 bytes
First seen:2024-08-22 09:34:29 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:HJf/F61LipFVeXM15FRJgmxNRtpQYx4N0QnBQ:HesrLLFDgox4SQnBQ
TLSH T19093E04DE38F05A2CF44A377436B4A8946FCB33EB60142A670AC937433EDC2E45A6578
Reporter SecuriteInfoCom
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
118
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Exploit.CVE-2017-11882.123.11787.15148
Verdict:
No threats detected
Analysis date:
2024-08-22 09:38:30 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/b25b3825-e6f5-420a-807c-76845af056a8

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):
SecuriteInfo.com.Exploit.CVE-2017-11882.123.11787.15148.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

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

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66c7064ab2a4681a72967671
Tags:
Discovery Encryption Execution Exploit Generic Infostealer Network Office Stealth
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
Creating a process with a hidden window
Launching a service
Possible injection to a system process
Connection attempt to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Launching a file downloaded from the Internet
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/66c7064c98e036ebc636ccbf/reports/e610cc76-0a9e-4e46-a01f-1602bef0a8b9/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866
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/1497299
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
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
Delayed program exit found
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Found malware configuration
Found potential equation exploit (CVE-2017-11882)
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 domain / URL
Multi AV Scanner detection for submitted file
Office drops RTF 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: 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: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell download and load assembly
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)
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
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1497299 Sample: SecuriteInfo.com.Exploit.CV... Startdate: 22/08/2024 Architecture: WINDOWS Score: 100 64 Multi AV Scanner detection for domain / URL 2->64 66 Suricata IDS alerts for network traffic 2->66 68 Found malware configuration 2->68 70 24 other signatures 2->70 11 WINWORD.EXE 336 17 2->11         started        process3 file4 42 C:\Users\...\~WRD0000.tmp:Zone.Identifier, ASCII 11->42 dropped 44 C:\Users\user\Desktop\~WRD0000.tmp, Rich 11->44 dropped 46 SecuriteInfo.com.E...87.15148.rtf (copy), Rich 11->46 dropped 48 ~WRF{63A195F2-14E7...E-3ED321B406C2}.tmp, Composite 11->48 dropped 14 EQNEDT32.EXE 12 11->14         started        process5 dnsIp6 58 45.90.89.50, 49161, 49163, 80 CMCSUS Bulgaria 14->58 50 C:\Users\...\creatednewbuttersmoothbuno.vBS, Unicode 14->50 dropped 60 Office equation editor establishes network connection 14->60 62 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 14->62 19 wscript.exe 1 14->19         started        file7 signatures8 process9 signatures10 72 Suspicious powershell command line found 19->72 74 Wscript starts Powershell (via cmd or directly) 19->74 76 Very long command line found 19->76 78 3 other signatures 19->78 22 powershell.exe 4 19->22         started        process11 signatures12 88 Suspicious powershell command line found 22->88 90 Suspicious execution chain found 22->90 25 powershell.exe 12 5 22->25         started        process13 dnsIp14 52 ia803104.us.archive.org 207.241.232.154, 443, 49162 INTERNET-ARCHIVEUS United States 25->52 92 Installs new ROOT certificates 25->92 94 Writes to foreign memory regions 25->94 96 Injects a PE file into a foreign processes 25->96 29 RegAsm.exe 3 13 25->29         started        33 RegAsm.exe 25->33         started        signatures15 process16 dnsIp17 54 45.90.89.98, 49164, 49165, 8243 CMCSUS Bulgaria 29->54 56 geoplugin.net 178.237.33.50, 49166, 80 ATOM86-ASATOM86NL Netherlands 29->56 98 Detected Remcos RAT 29->98 100 Maps a DLL or memory area into another process 29->100 102 Installs a global keyboard hook 29->102 35 RegAsm.exe 1 29->35         started        38 RegAsm.exe 1 29->38         started        40 RegAsm.exe 11 29->40         started        104 Contains functionality to bypass UAC (CMSTPLUA) 33->104 106 Tries to steal Mail credentials (via file registry) 33->106 108 Contains functionality to steal Chrome passwords or cookies 33->108 110 4 other signatures 33->110 signatures18 process19 signatures20 80 Tries to steal Instant Messenger accounts or passwords 35->80 82 Tries to steal Mail credentials (via file / registry access) 35->82 84 Searches for Windows Mail specific files 35->84 86 Tries to harvest and steal browser information (history, passwords, etc) 38->86
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-08-21 14:41:47 UTC
File Type:
Document
Extracted files:
4
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yzqzhe2iq67ohmbym7wcbnvkorenl44lfwbncivazvccm5wypbta._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240822-lkb3easfnm/
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
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Malware Config
Dropper Extraction:
https://ia803104.us.archive.org/27/items/vbs_20240726_20240726/vbs.jpg
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/f0532ed0-e5f0-476d-8e05-1d3e81050896
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c66193934887/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/c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866

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 c66193934887bee3b03867ec20b6aa7448d5f38b2d82d122a0cd442676d87866

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3121974/
  
Delivery method
Distributed via web download

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