MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080. 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: 12


Maldoc score: 4


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080
SHA3-384 hash: c034dee7d016425c21d178f025858c3a4e70b4aefa5fb6e9e3c8dbfbaa28e9dcf7a9097077124b2459da6a0b6f932170
SHA1 hash: a9745a0c2e8ce25927e5ceadd9c45e425a32a928
MD5 hash: 099593c191c9123cac56cc8e12ea83fc
humanhash: alanine-timing-monkey-queen
File name:DRAFT AWB and DRAFT Commercial invoice.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'066'496 bytes
First seen:2024-07-24 06:59:29 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 24576:iLrsx79FPdLrBKBUdWmSOe9tdbA8ivfUZ3LRmu:4Ix79FPpBKahSN9tZZd
TLSH T135352374BC838F16F00B547E64C7A9A31A09FD52A78DC1133348772E61766F25A63A2F
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)
Reporter abuse_ch
Tags:cve-2017-0199 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 15 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
499 bytesMBD000109CD/CompObj
5524934 bytesMBD000109CD/Package
6720 bytesMBD000109CE/Ole
7518177 bytesWorkbook
8523 bytes_VBA_PROJECT_CUR/PROJECT
9104 bytes_VBA_PROJECT_CUR/PROJECTwm
10977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
11977 bytes_VBA_PROJECT_CUR/VBA/Sheet2
12977 bytes_VBA_PROJECT_CUR/VBA/Sheet3
13985 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
142644 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
15553 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 :
353
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
https://bazaar.abuse.ch/sample/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080/
Verdict:
No threats detected
Analysis date:
2024-07-24 07:30:14 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/9cc212df-8924-40c9-af0e-153040a7e182

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
TwinWave.EvilDoc.93TilInfinity.20240412.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66a0a679a97e13ad9de79f7b
Tags:
Discovery Execution Generic Infostealer Network Office Stealth
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Using the Windows Management Instrumentation requests
Creating a window
DNS request
Sending an HTTP GET request
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Connection attempt by exploiting the app vulnerability
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080/results/dashboard
Payload URLs
URL
File name
http://tny.wtf/cyd
Embedded Ole
Behaviour
SuspiciousRTF detected
Verdict:
Unknown
Threat level:
  10/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/66a0a675bd793c18bfb64dbe/reports/bc843e96-e295-407e-8233-1fe9518d8780/overview
Verdict:
Malicious
Labled as:
CVE-2017-0199
Link:
https://www.hybrid-analysis.com/sample/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080
Gathering data
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1479859
Signature
AI detected suspicious Excel or Word document
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
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 new ROOT certificates
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Microsoft Office drops suspicious files
Microsoft Office launches external ms-search protocol handler (WebDAV)
Multi AV Scanner detection for domain / URL
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
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: Script Initiated Connection to Non-Local Network
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Uses dynamic DNS services
Very long command line found
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 Powershell download and execute
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1479859 Sample: DRAFT AWB and DRAFT Commerc... Startdate: 24/07/2024 Architecture: WINDOWS Score: 100 45 tny.wtf 2->45 67 Multi AV Scanner detection for domain / URL 2->67 69 Found malware configuration 2->69 71 Malicious sample detected (through community Yara rule) 2->71 73 22 other signatures 2->73 9 EXCEL.EXE 59 45 2->9         started        signatures3 process4 dnsIp5 49 46.183.222.11, 49162, 49166, 49169 DATACLUBLV Latvia 9->49 51 tny.wtf 188.114.96.3, 49161, 49164, 80 CLOUDFLARENETUS European Union 9->51 41 DRAFT AWB and DRAF... invoice.xls (copy), Composite 9->41 dropped 43 simplethingswantob...ngstouseugod[1].doc, Rich 9->43 dropped 13 wscript.exe 11 9->13         started        17 WINWORD.EXE 336 40 9->17         started        file6 process7 dnsIp8 59 pastecode.dev 13->59 61 pastecode.dev 172.66.43.27, 443, 49167 CLOUDFLARENETUS United States 13->61 95 System process connects to network (likely due to code injection or exploit) 13->95 97 Suspicious powershell command line found 13->97 99 Wscript starts Powershell (via cmd or directly) 13->99 107 5 other signatures 13->107 20 powershell.exe 12 5 13->20         started        63 tny.wtf 17->63 65 188.114.97.3, 49163, 49165, 80 CLOUDFLARENETUS European Union 17->65 31 C:\Users\user\AppData\Roaming\...\tny.wtf.url, MS 17->31 dropped 33 C:\Users\user\AppData\Roaming\...\cyd.url, MS 17->33 dropped 35 ~WRF{CE2AF4FE-8DB2...3-FCABDC411E41}.tmp, Composite 17->35 dropped 37 C:\Users\user\AppData\Local\...\A2903AEC.doc, Rich 17->37 dropped 101 Microsoft Office launches external ms-search protocol handler (WebDAV) 17->101 103 Office viewer loads remote template 17->103 105 Microsoft Office drops suspicious files 17->105 24 EQNEDT32.EXE 12 17->24         started        file9 signatures10 process11 dnsIp12 47 198.46.176.133, 49168, 80 AS-COLOCROSSINGUS United States 20->47 75 Writes to foreign memory regions 20->75 77 Suspicious execution chain found 20->77 79 Injects a PE file into a foreign processes 20->79 27 RegAsm.exe 2 10 20->27         started        39 C:\...\newsomethinggoodthingshappene.vBS, Unicode 24->39 dropped 81 Office equation editor establishes network connection 24->81 83 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 24->83 file13 signatures14 process15 dnsIp16 53 windowsssjunedd.duckdns.org 27->53 55 windowsssjunedd.duckdns.org 162.251.122.70, 45889, 49170 UNREAL-SERVERSUS Canada 27->55 57 geoplugin.net 178.237.33.50, 49171, 80 ATOM86-ASATOM86NL Netherlands 27->57 85 Contains functionality to steal Chrome passwords or cookies 27->85 87 Contains functionality to register a low level keyboard hook 27->87 89 Contains functionality to steal Firefox passwords or cookies 27->89 91 Delayed program exit found 27->91 signatures17 93 Uses dynamic DNS services 53->93
Score:
100%
Verdict:
Malware
File Type:
OFFICE
Link:
https://malprob.io/report/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4278ba95234c631bfa47d69548312641dc554df33a188004330f92bb61327080/
Threat name:
Document-Excel.Exploit.CVE-2017-0199
Create hunting rule
Status:
Malicious
First seen:
2024-07-24 05:41:13 UTC
File Type:
Document
Extracted files:
45
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ij4lvfjdjrrrx6sh22kuqmjgihofktpthimiabbtb6jlwyjsocaa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240724-hsm8vswgpd/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
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
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Command and Scripting Interpreter: PowerShell
Abuses OpenXML format to download file from external location
Blocklisted process makes network request
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/cd98ef0c-e32e-4a12-9657-a69eaf359cdd
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
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:maldoc_OLE_file_magic_number
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:office_document_vba
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Description:Office document with embedded VBA
Reference:https://github.com/jipegit/

File information

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

Comments