MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882
SHA3-384 hash: a322a88bb02f5c83499f9bed1dd6b3db3946d3e759dc3a9d2facf3f6a3647f8b4d493f9f9ce0666ce1e3c073ffedfb74
SHA1 hash: aa9339e51447b2766306991a1b7c489b483da9ea
MD5 hash: ce3b08f58d579862f5b03bb1f563f9f9
humanhash: purple-single-triple-september
File name:SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.26325.9717
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:90'579 bytes
First seen:2024-08-21 12:19:08 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:qLP65auBFk7eeq/Gd0zCx8sqnNji/BucU+1vYEAWOqGYzY8FT52UXc0Wr:suHbeq/40zCx8s8tip6cYBrYzBFFPc0I
TLSH T18993AD49A78F01A1CF50A277532B0A8941FDB73EB74106B6B4AC933537ADD3D406AA7C
Reporter SecuriteInfoCom
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
106
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.26325.9717
Verdict:
No threats detected
Analysis date:
2024-08-21 12:22:46 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/bad4318e-cca1-48cf-a8e0-7909e70cc127

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.28765.RtfHeur.ObjUpd.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.26325.9717.UNOFFICIAL
Create hunting rule

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:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66c5db7bb2a4681a72966cd0
Tags:
n/a
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/66c5db7dd89d14053474f013/reports/2c1d64d9-186e-455a-b371-45f2696a1ba9/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882
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/1496579
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 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: 1496579 Sample: SecuriteInfo.com.Exploit.Rt... Startdate: 21/08/2024 Architecture: WINDOWS Score: 100 70 Suricata IDS alerts for network traffic 2->70 72 Found malware configuration 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 23 other signatures 2->76 11 WINWORD.EXE 336 17 2->11         started        process3 file4 40 C:\Users\...\~WRD0000.tmp:Zone.Identifier, ASCII 11->40 dropped 42 C:\Users\user\Desktop\~WRD0000.tmp, Rich 11->42 dropped 44 SecuriteInfo.com.E...325.9717.rtf (copy), Rich 11->44 dropped 46 ~WRF{42130749-36CE...5-E970F46F7CDE}.tmp, Composite 11->46 dropped 14 EQNEDT32.EXE 12 11->14         started        process5 dnsIp6 56 45.90.89.50, 49165, 49167, 80 CMCSUS Bulgaria 14->56 48 C:\Users\...\mugcackecholocatebutterburnm.vBS, Unicode 14->48 dropped 58 Office equation editor establishes network connection 14->58 60 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 14->60 19 wscript.exe 1 14->19         started        file7 signatures8 process9 signatures10 78 Suspicious powershell command line found 19->78 80 Wscript starts Powershell (via cmd or directly) 19->80 82 Very long command line found 19->82 84 3 other signatures 19->84 22 powershell.exe 4 19->22         started        process11 signatures12 86 Suspicious powershell command line found 22->86 88 Suspicious execution chain found 22->88 25 powershell.exe 12 5 22->25         started        process13 dnsIp14 50 ia803104.us.archive.org 207.241.232.154, 443, 49166 INTERNET-ARCHIVEUS United States 25->50 90 Installs new ROOT certificates 25->90 92 Writes to foreign memory regions 25->92 94 Injects a PE file into a foreign processes 25->94 29 RegAsm.exe 3 13 25->29         started        signatures15 process16 dnsIp17 52 45.90.89.98, 49168, 49169, 8243 CMCSUS Bulgaria 29->52 54 geoplugin.net 178.237.33.50, 49170, 80 ATOM86-ASATOM86NL Netherlands 29->54 96 Contains functionality to bypass UAC (CMSTPLUA) 29->96 98 Detected Remcos RAT 29->98 100 Tries to steal Mail credentials (via file registry) 29->100 102 7 other signatures 29->102 33 RegAsm.exe 1 29->33         started        36 RegAsm.exe 1 29->36         started        38 RegAsm.exe 11 29->38         started        signatures18 process19 signatures20 62 Tries to steal Instant Messenger accounts or passwords 33->62 64 Tries to steal Mail credentials (via file / registry access) 33->64 66 Searches for Windows Mail specific files 33->66 68 Tries to harvest and steal browser information (history, passwords, etc) 36->68
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-08-20 13:32:59 UTC
File Type:
Document
Extracted files:
4
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hv3djjlwogrmw7bb6ukdotjifah4g4epcfflopqfsowjceir5cba._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240821-phra4a1fpm/
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/730dd56a-92ee-44b9-904d-f57c3348dab9
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/3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882

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 3d7634a57671a2cb7c21f514374d28280fc3708f114ab73e0593ac911111e882

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3119847/
  
Delivery method
Distributed via web download

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