MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e. 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: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e
SHA3-384 hash: 9c6ab7620ec909781ebe9f9ebd1b8985bceb0114633fda9540d06256c446cba972c53a19f966db35341d6361bfac81d0
SHA1 hash: 393e06b13be277f81fee601b180fb3b9a8c4e06a
MD5 hash: 93427ae26917fa3d4dc902d43f790b90
humanhash: fruit-blue-oklahoma-butter
File name:2020_SOA_Payment_21Dec2020.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'533'476 bytes
First seen:2021-01-29 06:30:55 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 24576:Il+ZnX58QIj1eEEbdd2xLSfq7+eaS7wbHz+MvosfvV6PiBj9MD21TUigaR3vSwN0:a
TLSH 44C5BFF876047DE6266F576BDA96ACDD13B617229ACBA4CC80A477C305A3335FE02C05
Reporter cocaman
Tags:doc RAT RemcosRAT


Avatar
cocaman
Malicious email (T1566.001)
From: "=?UTF-8?B?Q8OhdGlhIENvc3Rh?= <financeiro@trueshoes.pt>" (likely spoofed)
Received: "from gmail.com (unknown [84.38.135.136]) "
Date: "29 Jan 2021 06:18:58 +0200"
Subject: "Re: Payment Instructions_Dec 2020"
Attachment: "2020_SOA_Payment_21Dec2020.doc"

Intelligence

File Origin
# of uploads :
1
# of downloads :
103
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
2020_SOA_Payment_21Dec2020.doc
Verdict:
Malicious activity
Analysis date:
2021-01-29 06:33:48 UTC
Tags:
exploit CVE-2017-11882 loader trojan rat remcos stealer keylogger
Link:
https://app.any.run/tasks/a59c6103-8d5f-49cf-802e-b1257ac91562

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.170830.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.RTFSTR._EQUATION.200422.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
DNS request
Creating a file in the %AppData% directory
Running batch commands
Creating a process with a hidden window
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Adding an access-denied ACE
Deleting a recently created file
Connecting to a non-recommended domain
Sending a custom TCP request
Launching the default Windows debugger (dwwin.exe)
Launching a service
Reading critical registry keys
Creating a file
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Setting a global event handler for the keyboard
Stealing user critical data
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e/results/dashboard
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/593584
Signature
.NET source code contains very large strings
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
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
Detected Remcos RAT
Detected unpacking (creates a PE file in dynamic memory)
Hides threads from debuggers
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Searches for Windows Mail specific files
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
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 access)
Tries to steal Mail credentials (via file registry)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 345834 Sample: 2020_SOA_Payment_21Dec2020.doc Startdate: 29/01/2021 Architecture: WINDOWS Score: 100 73 Multi AV Scanner detection for domain / URL 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Multi AV Scanner detection for submitted file 2->77 79 8 other signatures 2->79 12 EQNEDT32.EXE 1 2->12         started        17 win.exe 1 2->17         started        19 WINWORD.EXE 336 20 2->19         started        21 EQNEDT32.EXE 2->21         started        process3 dnsIp4 69 manojvashanava234.sytes.net 84.38.135.158, 49165, 80 DATACLUBLV Latvia 12->69 65 C:\Users\user\AppData\Roaming\SHU.exe, PE32 12->65 dropped 105 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->105 23 SHU.exe 1 12->23         started        107 Hides threads from debuggers 17->107 109 Injects a PE file into a foreign processes 17->109 26 cmd.exe 17->26         started        28 win.exe 17->28         started        30 win.exe 17->30         started        file5 signatures6 process7 signatures8 89 Multi AV Scanner detection for dropped file 23->89 91 Machine Learning detection for dropped file 23->91 93 Contains functionality to steal Chrome passwords or cookies 23->93 95 7 other signatures 23->95 32 SHU.exe 1 3 23->32         started        35 cmd.exe 23->35         started        37 timeout.exe 26->37         started        process9 file10 63 C:\Users\user\AppData\Roaming\win.exe, PE32 32->63 dropped 39 wscript.exe 1 32->39         started        41 timeout.exe 35->41         started        process11 process12 43 cmd.exe 39->43         started        process13 45 win.exe 1 43->45         started        signatures14 97 Detected unpacking (creates a PE file in dynamic memory) 45->97 99 Tries to steal Mail credentials (via file registry) 45->99 101 Machine Learning detection for dropped file 45->101 103 5 other signatures 45->103 48 win.exe 2 1 45->48         started        52 cmd.exe 45->52         started        process15 dnsIp16 67 everestenterprses21.sytes.net 192.253.246.138, 2017, 49166, 49167 LEASEWEB-USA-NYC-11US United States 48->67 71 Injects a PE file into a foreign processes 48->71 54 win.exe 48->54         started        57 win.exe 48->57         started        59 win.exe 48->59         started        61 timeout.exe 52->61         started        signatures17 process18 signatures19 81 Tries to steal Instant Messenger accounts or passwords 54->81 83 Tries to steal Mail credentials (via file access) 54->83 85 Searches for Windows Mail specific files 54->85 87 Tries to harvest and steal browser information (history, passwords, etc) 57->87
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e/
Threat name:
Document-RTF.Trojan.Phonzy
Create hunting rule
Status:
Malicious
First seen:
2021-01-29 06:31:06 UTC
File Type:
Document
Extracted files:
2
AV detection:
20 of 45 (44.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kyap6ffjz37hkhaphekxu6ot66jeobuqbrtexqmmlbttv7vvigpa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
ransomware
Link:
https://tria.ge/reports/210129-f8ablql3ha/
Behaviour
Checks processor information in registry
Delays execution with timeout.exe
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
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
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e

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_EXPLOIT_CVE_2017_11882_4
Create hunting rule
Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882
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.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

RemcosRAT

Word file doc 5600ff14a9cefe751c0f39157a79d3f7924706900c664bc18c58673afeb5419e

(this sample)

  
Delivery method
Distributed via e-mail attachment

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