MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e
SHA3-384 hash: f18a18d8f5814d6b0dccb87961142494b5a584b61224f7c4c1643c2568a08a3d0bb3b32b250cbcc84a46b7ad4be00e5b
SHA1 hash: 08a241bc943f69b937e6df4bd231d19d81b84128
MD5 hash: 3e734589bebe665471dec5c6342b1df3
humanhash: rugby-zebra-idaho-four
File name:New PO.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'357'968 bytes
First seen:2021-01-08 07:27:47 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 24576:tdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjXdjW:tdzdzdzdzdzdzdzdzdzdzdzdzdzdzdz6
TLSH E855F1E4A69159EBE3080DEA6CD9B9CA6223F124A8C05595F6CFD77E13FB108FC1D406
Reporter abuse_ch
Tags:doc RemcosRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: slot0.legrogroup.nl
Sending IP: 45.85.90.83
From: Lillian Zhang <office@jocmachinerys.com>
Reply-To: swiftlogz@yandex.com
Subject: Re: TOP URGENT INQUIRY
Attachment: New PO.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
New PO.doc
Verdict:
Malicious activity
Analysis date:
2021-01-08 07:31:47 UTC
Tags:
ole-embedded exploit CVE-2017-11882 rat remcos trojan keylogger
Link:
https://app.any.run/tasks/a111a90e-16c8-418d-bd62-72d477753c42

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.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.RTFSTR._E_R_N_E_L_3_2_OADLIBRARYW_S_ETPROCADDRESS_.200622.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
DNS request
Sending an HTTP GET request
Sending a custom TCP request by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e/results/dashboard
Result
Threat name:
Remcos GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/576435
Signature
Connects to a URL shortener service
Connects to many ports of the same IP (likely port scanning)
Contains functionality to hide a thread from the debugger
Drops PE files to the user root directory
Hides threads from debuggers
Malicious sample detected (through community Yara rule)
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)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Sigma detected: Suspicious Program Location Process Starts
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected VB6 Downloader Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 337271 Sample: New PO.doc Startdate: 08/01/2021 Architecture: WINDOWS Score: 100 40 Malicious sample detected (through community Yara rule) 2->40 42 Multi AV Scanner detection for submitted file 2->42 44 Yara detected GuLoader 2->44 46 13 other signatures 2->46 7 EQNEDT32.EXE 17 2->7         started        12 WINWORD.EXE 291 26 2->12         started        process3 dnsIp4 36 bit.ly 67.199.248.11, 49167, 80 GOOGLE-PRIVATE-CLOUDUS United States 7->36 38 makeindiachinafree.in 156.67.222.140, 443, 49168 AS-HOSTINGERLT Cyprus 7->38 24 C:\Users\user\AppData\...\OneDrive[1].txt, PE32 7->24 dropped 26 C:\Users\Public\69577.exe, PE32 7->26 dropped 52 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->52 14 69577.exe 7->14         started        28 C:\Users\user\Desktop\~$New PO.doc, data 12->28 dropped file5 signatures6 process7 signatures8 54 Writes to foreign memory regions 14->54 56 Tries to detect Any.run 14->56 58 Hides threads from debuggers 14->58 60 Contains functionality to hide a thread from the debugger 14->60 17 ieinstal.exe 2 13 14->17         started        process9 dnsIp10 30 wealthyblessed.myddns.rocks 185.157.161.61, 49173, 52360 OBE-EUROPEObenetworkEuropeSE Sweden 17->30 32 googlehosted.l.googleusercontent.com 142.250.180.97, 443, 49172 GOOGLEUS United States 17->32 34 doc-0c-8c-docs.googleusercontent.com 17->34 22 C:\Users\user\AppData\Roaming\...\logs.dat, ASCII 17->22 dropped 48 Tries to detect Any.run 17->48 50 Hides threads from debuggers 17->50 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e/
Threat name:
Script.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-01-08 07:28:06 UTC
AV detection:
10 of 46 (21.74%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rbdysvxknshkkqr6fqyoep537cj7j254vi3rrvahvrayx6mwjqha._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos rat
Link:
https://tria.ge/reports/210108-lmzmcqgx8e/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Remcos
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Bloodhound
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e

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_8759_2
Create hunting rule
Author:ditekSHen
Description:detects CVE-2017-8759 weaponized RTF documents.
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 88478956ea6c8ea5423e2c30e23fbbf893f4ebbcaa3718d407ac418bf9964c0e

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments