MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc
SHA3-384 hash: 8450606e0c6bdf160c481a1e6da0787c75683f2dde012bd9147af39cb38ec3ad8bbf902caf86f6125add8c4504c885cd
SHA1 hash: eef40083b8670934b5b848d9995f27e37172b610
MD5 hash: 47dfbbf7dd2b6cee793d3ddb6c22364e
humanhash: island-undress-oven-alanine
File name:SecuriteInfo.com.Exploit.ShellCode.69.24616.9282
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:64'639 bytes
First seen:2024-04-16 13:27:03 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 1536:92RQqyDNx43c9Ab6Zz8cMuMg3HDHYOU98QE1H1:9gQqyDnioAb6x8cMuPk2Q+V
TLSH T19653692EE34F0915DF56967B034A4B4A45FCB33DB28500A179BC97743BADC2E4A6287C
Reporter SecuriteInfoCom
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
129
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc.rtf
Verdict:
No threats detected
Analysis date:
2024-04-16 13:32:43 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c7b69658-a7d4-4a7a-9b08-f46af2f9589f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
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
DNS request
Connection attempt
Sending a custom TCP request
Creating a process with a hidden window
Running batch commands
Creating a file
Launching a service
Moving a file to the Program Files subdirectory
Replacing files
Possible injection to a system process
Connection attempt 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/10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
91%
Tags:
embedequation exploit masquerade shellcode
Link:
https://www.filescan.io/uploads/661e7cae54bafb7d21cee402/reports/b71307c2-0e07-4f7d-9d0c-469a90f5bbb8/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
spre.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1426753
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
Connects to a pastebin service (likely for C&C)
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
Creates autostart registry keys with suspicious values (likely registry only malware)
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 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 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: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell download and load assembly
Sigma detected: Powershell download payload from hardcoded c2 list
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)
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)
Uses certutil -decode
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 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: 1426753 Sample: SecuriteInfo.com.Exploit.Sh... Startdate: 16/04/2024 Architecture: WINDOWS Score: 100 70 Snort IDS alert for network traffic 2->70 72 Multi AV Scanner detection for domain / URL 2->72 74 Found malware configuration 2->74 76 27 other signatures 2->76 11 WINWORD.EXE 291 15 2->11         started        14 wscript.exe 2->14         started        17 wscript.exe 2->17         started        process3 file4 56 ~WRF{CA543F72-2079...E-1CAAB2B57148}.tmp, Composite 11->56 dropped 19 EQNEDT32.EXE 12 11->19         started        120 Windows Scripting host queries suspicious COM object (likely to drop second stage) 14->120 signatures5 process6 dnsIp7 58 23.94.36.10, 49161, 49165, 80 AS-COLOCROSSINGUS United States 19->58 54 C:\Users\user\...\imageloverkissingme.vbs, Unicode 19->54 dropped 86 Office equation editor establishes network connection 19->86 88 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 19->88 24 wscript.exe 6 14 19->24         started        file8 signatures9 process10 dnsIp11 66 paste.ee 24->66 68 104.21.84.67, 443, 49162 CLOUDFLARENETUS United States 24->68 98 System process connects to network (likely due to code injection or exploit) 24->98 100 Uses certutil -decode 24->100 102 Suspicious powershell command line found 24->102 106 6 other signatures 24->106 28 powershell.exe 4 24->28         started        31 cmd.exe 1 24->31         started        33 certutil.exe 1 24->33         started        signatures12 104 Connects to a pastebin service (likely for C&C) 66->104 process13 signatures14 108 Suspicious powershell command line found 28->108 110 Suspicious execution chain found 28->110 35 powershell.exe 13 6 28->35         started        process15 dnsIp16 60 uploaddeimagens.com.br 172.67.215.45, 443, 49163, 49164 CLOUDFLARENETUS United States 35->60 78 Suspicious powershell command line found 35->78 80 Creates autostart registry keys with suspicious values (likely registry only malware) 35->80 82 Writes to foreign memory regions 35->82 84 Injects a PE file into a foreign processes 35->84 39 RegAsm.exe 3 10 35->39         started        43 powershell.exe 5 35->43         started        signatures17 process18 dnsIp19 62 107.175.229.141, 36832, 49166, 49167 AS-COLOCROSSINGUS United States 39->62 64 geoplugin.net 178.237.33.50, 49169, 80 ATOM86-ASATOM86NL Netherlands 39->64 90 Contains functionality to bypass UAC (CMSTPLUA) 39->90 92 Detected Remcos RAT 39->92 94 Tries to steal Mail credentials (via file registry) 39->94 96 7 other signatures 39->96 45 RegAsm.exe 39->45         started        48 RegAsm.exe 39->48         started        50 RegAsm.exe 39->50         started        52 3 other processes 39->52 signatures20 process21 signatures22 112 Tries to steal Instant Messenger accounts or passwords 45->112 114 Tries to steal Mail credentials (via file / registry access) 45->114 116 Searches for Windows Mail specific files 45->116 118 Tries to harvest and steal browser information (history, passwords, etc) 48->118
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-04-16 13:28:07 UTC
File Type:
Document
Extracted files:
6
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cbkqu2collzknl76dkvqq3yypegrg44sukqukeb5xb6s5iau3s6a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:april floki collection persistence rat spyware stealer
Link:
https://tria.ge/reports/240416-qp5bzabb73/
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
Reads user/profile data of web browsers
Blocklisted process makes network request
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
107.175.229.141:36832
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/10550a684e5a/report/overview.html
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/10550a684e5af2a6affe1aab086f18790d137392a2a145103db87d2ea014dcbc

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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.

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