MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 667a53cc4d5c8428f4da74f07e018bde991b06288f96532ae7a21dce1f161e13. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments 1

SHA256 hash: 667a53cc4d5c8428f4da74f07e018bde991b06288f96532ae7a21dce1f161e13
SHA3-384 hash: 63ffd4b5b819a98726ca6a7388c8808e32cadab0fd0a1f8d497aa423137a475b1cc9bae118598207cd26544b93c73d9a
SHA1 hash: bc2ec69d8ac02bd3b7aea3573848fa1169cceb83
MD5 hash: d251d3dc70ec562e6e92ac28c05f1aa9
humanhash: emma-magnesium-social-montana
File name:d251d3dc70ec562e6e92ac28c05f1aa9
Download: download sample
Signature RemcosRAT
File size:26'224 bytes
First seen:2023-05-24 16:36:10 UTC
Last seen:2023-05-24 18:51:58 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:7ftZTiGOzSCOunUs2A67BOBS1uDkOxg2jYOKM9MCkmoqS:7ftZTFOoeUs2A6dYyuDkOvYrMMCkmoqS
TLSH T1BEC2F5965B8C4C61E269E87B865EE00E58FCF23634C215C4BD9DE2743B3D14E0B6B5B8
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence


File Origin
# of uploads :
2
# of downloads :
130
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SWIFT Payment Confirmation.docx
Verdict:
Malicious activity
Analysis date:
2023-05-24 15:45:52 UTC
Tags:
opendir exploit cve-2017-11882 loader

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Sending an HTTP GET request
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit exploit shellcode
Result
Verdict:
MALICIOUS
Result
Threat name:
DarkTortilla, Remcos
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Drops PE files to the user root directory
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Yara detected DarkTortilla Crypter
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 874858 Sample: QV7ZPP6rzf.rtf Startdate: 24/05/2023 Architecture: WINDOWS Score: 100 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 15 other signatures 2->52 8 EQNEDT32.EXE 12 2->8         started        13 WINWORD.EXE 291 20 2->13         started        process3 dnsIp4 42 23.95.122.242, 49181, 80 AS-COLOCROSSINGUS United States 8->42 34 C:\Users\user\AppData\...\CK_CACHE[1].exe, PE32 8->34 dropped 36 C:\Users\Public\IE_CACHE.exe, PE32 8->36 dropped 58 Office equation editor establishes network connection 8->58 60 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->60 15 IE_CACHE.exe 1 6 8->15         started        18 PING.EXE 8->18         started        20 PING.EXE 8->20         started        38 ~WRF{A06C6FE0-AC30...B-2A7FF4A2C111}.tmp, Composite 13->38 dropped file5 signatures6 process7 signatures8 64 Antivirus detection for dropped file 15->64 66 Machine Learning detection for dropped file 15->66 68 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->68 22 cmd.exe 15->22         started        25 cmd.exe 1 15->25         started        process9 file10 54 Uses ping.exe to sleep 22->54 56 Uses ping.exe to check the status of other devices and networks 22->56 28 reg.exe 1 22->28         started        31 PING.EXE 22->31         started        40 C:\Users\user\AppData\Roaming\widow\wid.exe, PE32 25->40 dropped signatures11 process12 dnsIp13 62 Creates an undocumented autostart registry key 28->62 44 127.0.0.1 unknown unknown 31->44 signatures14
Threat name:
Win32.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2023-05-24 12:38:33 UTC
File Type:
Document
Extracted files:
4
AV detection:
14 of 34 (41.18%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  10/10
Tags:
persistence
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Runs ping.exe
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
Drops file in Windows directory
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Modifies WinLogon for persistence
Please note that we are no longer able to provide a coverage score for Virus Total.

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:INDICATOR_RTF_MalVer_Objects
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
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 667a53cc4d5c8428f4da74f07e018bde991b06288f96532ae7a21dce1f161e13

(this sample)

  
Delivery method
Distributed via web download

Comments



Avatar
zbet commented on 2023-05-24 16:36:11 UTC

url : hxxp://23.95.122.242/ij/ijijijijijijijijijijiji%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23ijijijijijijij.doc