MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f. 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: 16


Intelligence 16 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f
SHA3-384 hash: 2102716ff665df10adbd7069ac96db907fda4589a38b7a0e0977a2c51a8f4cc0a392d2a95da8a311a7e9724f3ef18e2e
SHA1 hash: de90b4973ff236b3de7f214e3bce17d6d94f937f
MD5 hash: 75ea30d53407de50f374dcb996d16382
humanhash: south-december-single-equal
File name:PI-100957Review invoice.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:730'885 bytes
First seen:2024-08-27 10:45:48 UTC
Last seen:2024-08-27 11:42:36 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 6144:FwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwA9:z
TLSH T180F47E2DD34B02598F620377AB571E5142BDBA7EF38552B1302C537933EAC39A1252BE
Magika rtf
Reporter cocaman
Tags:CVE-2017-11882 doc INVOICE RemcosRAT


Avatar
cocaman
Malicious email (T1566.001)
From: "Andrew Chen <accounts@milcrosolft.info>" (likely spoofed)
Received: "from mail.milcrosolft.info (unknown [207.148.6.87]) "
Date: "Tue, 27 Aug 2024 03:33:48 -0700"
Subject: "RE: PI-100957//Review invoice to pounds Ghp"
Attachment: "PI-100957Review invoice.doc"

Intelligence

File Origin
# of uploads :
4
# of downloads :
423
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
PI-100957Review invoice.doc
Verdict:
No threats detected
Analysis date:
2024-08-27 10:48:22 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/30e68f7b-3c24-4587-bbb8-beefc3bddc1b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

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

MiscreantPunch.EvilRTF.CommonLure.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.RoomService.20230808.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66cdae6ce7ff3f5a063c170e
Tags:
Execution Exploit Generic Network Office Stealth Trojan Obfuscated
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
Launching a service
Creating a file
Setting a keyboard event handler
DNS request
Connecting to a non-recommended domain
Connection attempt
Sending a custom TCP request
Reading critical registry keys
Creating a file in the %temp% directory
Connection attempt by exploiting the app vulnerability
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/66cdae70eb26ed7f73c50b2c/reports/016f29fd-0453-4d63-9497-1e59d25b9257/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f
Label:
Malicious
Suspicious Score:
10/10
Score Malicious:
1%
Score Benign:
0%
Link:
https://www.malware.ai/gui/files/?id=40fdae69-4d4e-4083-8e9d-2489f200be7c
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/1499697
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
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)
Searches for Windows Mail specific files
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Sigma detected: Suspicious Binary In User Directory Spawned From Office Application
Sigma detected: Suspicious Microsoft Office Child Process
Suricata IDS alerts for network traffic
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)
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: 1499697 Sample: PI-100957Review invoice.doc Startdate: 27/08/2024 Architecture: WINDOWS Score: 100 47 Suricata IDS alerts for network traffic 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 19 other signatures 2->53 9 WINWORD.EXE 291 18 2->9         started        process3 process4 11 EQNEDT32.EXE 11 9->11         started        16 EQNEDT32.EXE 9->16         started        dnsIp5 45 45.200.149.75, 49161, 80 Africa-on-Cloud-ASZA Seychelles 11->45 37 C:\Users\user\AppData\...\bcvplug09185.exe, PE32 11->37 dropped 39 C:\Users\user\...\JLiiddebMDWNbcv[1].exe, PE32 11->39 dropped 79 Office equation editor establishes network connection 11->79 81 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->81 18 bcvplug09185.exe 1 8 11->18         started        file6 signatures7 process8 signatures9 55 Multi AV Scanner detection for dropped file 18->55 57 Contains functionality to bypass UAC (CMSTPLUA) 18->57 59 Tries to steal Mail credentials (via file registry) 18->59 61 8 other signatures 18->61 21 bcvplug09185.exe 3 13 18->21         started        26 powershell.exe 4 18->26         started        process10 dnsIp11 41 tvq3101.sytes.net 103.186.116.236, 1974, 49162, 49163 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 21->41 43 geoplugin.net 178.237.33.50, 49164, 80 ATOM86-ASATOM86NL Netherlands 21->43 35 C:\ProgramData\remcos\logs.dat, data 21->35 dropped 63 Detected Remcos RAT 21->63 65 Maps a DLL or memory area into another process 21->65 67 Installs a global keyboard hook 21->67 28 bcvplug09185.exe 1 21->28         started        31 bcvplug09185.exe 1 21->31         started        33 bcvplug09185.exe 11 21->33         started        69 Installs new ROOT certificates 26->69 file12 signatures13 process14 signatures15 71 Tries to steal Instant Messenger accounts or passwords 28->71 73 Tries to steal Mail credentials (via file / registry access) 28->73 75 Searches for Windows Mail specific files 28->75 77 Tries to harvest and steal browser information (history, passwords, etc) 31->77
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-08-27 06:58:54 UTC
File Type:
Document
Extracted files:
3
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ed3j3psqlpvnxnvkanqq5p2yu6ynnuak3ltwejolhan2j65kkihq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:bcv collection credential_access discovery execution rat spyware stealer
Link:
https://tria.ge/reports/240827-mtys7sycjm/
Behaviour
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Downloads MZ/PE file
Credentials from Password Stores: Credentials from Web Browsers
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Malware Config
C2 Extraction:
tvq3101.sytes.net:1974
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/20f69dbe505b/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f

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.

Malspam

RemcosRAT

Word file doc 20f69dbe505beadbb6aa03610ebf58a7b0d6d00adae76225cb381ba4fbaa520f

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments