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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 20efb5b024328037e0991db2db376723ee239c5dfa8933dd24fdcc29e7fe8256. 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


Maldoc score: 4


Intelligence 11 IOCs YARA 1 File information Comments

SHA256 hash: 20efb5b024328037e0991db2db376723ee239c5dfa8933dd24fdcc29e7fe8256
SHA3-384 hash: d32587c78326837eba4d25ca67eb87a311e3af30fb64c232f897cdb4236e9f955a132652e96ccdabff51b4cdc730c30c
SHA1 hash: bef63e320407ad6b5c2fba7d98e79bd0bc497ea1
MD5 hash: 43983a4a84f12dd512b7dd6e1e72dd1d
humanhash: johnny-low-monkey-washington
File name:invoice_45009.xls
Download: download sample
Signature RemcosRAT
File size:1'095'168 bytes
First seen:2024-10-07 12:50:27 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 12288:xmzHJEHAfwu4hyD3DERnLRmF8DnPrf1D3dOFu4Ah8d2X73dCS5duPFo8n55Gvv:gLw/hybARM8vd3cAh8dacS5du+8nbGn
TLSH T1DE35CF83EA1D4F62CE41423066F7577A1320DC43D622872B22F5772839FBAD06956FAD
TrID 46.5% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
26.7% (.XLS) Microsoft Excel sheet (32500/1/3)
20.1% (.XLS) Microsoft Excel sheet (alternate) (24500/1/2)
6.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Magika xls
Reporter abuse_ch
Tags:RemcosRAT xls

Office OLE Information


This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 4
OLE dump

MalwareBazaar was able to identify 31 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
4114 bytesMBD009D0188/CompObj
5244 bytesMBD009D0188/DocumentSummaryInformation
690976 bytesMBD009D0188/SummaryInformation
720 bytesMBD009D0188/MBD0018D4CE/Ole
84 bytesMBD009D0188/MBD0018D4CE/ObjInfo
9197671 bytesMBD009D0188/MBD0018D4CE/Contents
10114 bytesMBD009D0188/MBD002A52B4/CompObj
1150945 bytesMBD009D0188/MBD002A52B4/Package
12114 bytesMBD009D0188/MBD002A56E1/CompObj
1331124 bytesMBD009D0188/MBD002A56E1/Package
14114 bytesMBD009D0188/MBD002A5E23/CompObj
15484 bytesMBD009D0188/MBD002A5E23/DocumentSummaryInformation
1619956 bytesMBD009D0188/MBD002A5E23/SummaryInformation
1795624 bytesMBD009D0188/MBD002A5E23/Workbook
1894 bytesMBD009D0188/MBD002A6130/CompObj
1964 bytesMBD009D0188/MBD002A6130/Ole
2021760 bytesMBD009D0188/MBD002A6130/CONTENTS
21218908 bytesMBD009D0188/Workbook
22660 bytesMBD009D0189/Ole
23339343 bytesWorkbook
24523 bytes_VBA_PROJECT_CUR/PROJECT
25104 bytes_VBA_PROJECT_CUR/PROJECTwm
26977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
27977 bytes_VBA_PROJECT_CUR/VBA/Sheet2
28977 bytes_VBA_PROJECT_CUR/VBA/Sheet3
29985 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
302644 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
31553 bytes_VBA_PROJECT_CUR/VBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence


File Origin
# of uploads :
1
# of downloads :
421
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
invoice_45009.xls
Verdict:
No threats detected
Analysis date:
2024-10-07 12:58:36 UTC
Tags:
n/a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
92.5%
Tags:
Office Macro Micro
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Payload URLs
URL
File name
https://m2g.me/d1a1
Embedded Ole
Behaviour
SuspiciousRTF detected
Document image
Document image
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
macros
Gathering data
Result
Threat name:
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Signature
Antivirus detection for dropped file
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
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Excel sheet contains many unusual embedded objects
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Microsoft Office launches external ms-search protocol handler (WebDAV)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office drops RTF file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Office viewer loads remote template
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: HackTool - CrackMapExec PowerShell Obfuscation
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
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)
Uses dynamic DNS services
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 Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1528050 Sample: invoice_45009.xls Startdate: 07/10/2024 Architecture: WINDOWS Score: 100 64 m2g.me 2->64 90 Suricata IDS alerts for network traffic 2->90 92 Found malware configuration 2->92 94 Malicious sample detected (through community Yara rule) 2->94 96 21 other signatures 2->96 11 EXCEL.EXE 59 35 2->11         started        signatures3 process4 dnsIp5 68 m2g.me 14.194.50.211, 443, 49163, 49165 TTSLMEIS-AS-APTTSL-ISPDIVISIONIN India 11->68 70 38.240.44.9, 49164, 49171, 49172 COGENT-174US United States 11->70 56 C:\Users\user\...\invoice_45009.xls (copy), Composite 11->56 dropped 15 wscript.exe 1 11->15         started        18 WINWORD.EXE 348 31 11->18         started        file6 process7 dnsIp8 120 Suspicious powershell command line found 15->120 122 Wscript starts Powershell (via cmd or directly) 15->122 124 Bypasses PowerShell execution policy 15->124 132 2 other signatures 15->132 22 powershell.exe 4 15->22         started        66 m2g.me 18->66 48 C:\Users\user\AppData\Roaming\...\m2g.me.url, MS 18->48 dropped 50 C:\Users\user\AppData\Roaming\...\d1a1.url, MS 18->50 dropped 52 ~WRF{93BF753C-FD01...B-F8FB75D6D297}.tmp, Composite 18->52 dropped 126 Microsoft Office launches external ms-search protocol handler (WebDAV) 18->126 128 Office viewer loads remote template 18->128 130 Microsoft Office drops suspicious files 18->130 25 EQNEDT32.EXE 12 18->25         started        file9 signatures10 process11 file12 98 Suspicious powershell command line found 22->98 100 Obfuscated command line found 22->100 102 Suspicious execution chain found 22->102 28 powershell.exe 12 5 22->28         started        54 C:\Users\...\newsweetnesswithverynicecute.vbS, Unicode 25->54 dropped 104 Office equation editor establishes network connection 25->104 106 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 25->106 signatures13 process14 dnsIp15 72 raw.githubusercontent.com 185.199.111.133, 443, 49174 FASTLYUS Netherlands 28->72 116 Writes to foreign memory regions 28->116 118 Injects a PE file into a foreign processes 28->118 32 RegAsm.exe 3 13 28->32         started        37 RegAsm.exe 28->37         started        signatures16 process17 dnsIp18 58 ugnrv.duckdns.org 32->58 60 ugnrv.duckdns.org 192.3.101.184, 49177, 49178, 9674 AS-COLOCROSSINGUS United States 32->60 62 geoplugin.net 178.237.33.50, 49179, 80 ATOM86-ASATOM86NL Netherlands 32->62 46 C:\ProgramData\remcos\logs.dat, data 32->46 dropped 74 Detected Remcos RAT 32->74 76 Maps a DLL or memory area into another process 32->76 78 Installs a global keyboard hook 32->78 39 RegAsm.exe 1 32->39         started        42 RegAsm.exe 32->42         started        44 RegAsm.exe 11 32->44         started        80 Contains functionality to bypass UAC (CMSTPLUA) 37->80 82 Tries to steal Mail credentials (via file registry) 37->82 84 Contains functionalty to change the wallpaper 37->84 88 5 other signatures 37->88 file19 86 Uses dynamic DNS services 58->86 signatures20 process21 signatures22 108 Tries to steal Instant Messenger accounts or passwords 39->108 110 Tries to steal Mail credentials (via file / registry access) 39->110 112 Searches for Windows Mail specific files 39->112 114 Tries to harvest and steal browser information (history, passwords, etc) 42->114
Threat name:
Win32.Trojan.Generic
Status:
Malicious
First seen:
2024-10-07 12:51:15 UTC
File Type:
Document
Extracted files:
75
AV detection:
11 of 24 (45.83%)
Threat level:
  2/5
Result
Malware family:
n/a
Score:
  3/10
Tags:
discovery
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
System Location Discovery: System Language Discovery
Malware Family:
n/a
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
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:informational_win_ole_protected
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.

File information


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

Comments