MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff. 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: 13


Maldoc score: 8


Intelligence 13 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff
SHA3-384 hash: 19ea1cf3ef67cf6534f175e72c5e4d4ebad57d0d1e6cb63045503f4f039827c725ca45c2174edac63bad5dedf2b6fa00
SHA1 hash: c3be1eae1b31e72172e8146eb107775e9e4ee5ce
MD5 hash: fc93ed6c93b7709bd949a2f5fd463f94
humanhash: oven-magazine-enemy-double
File name:Electronic Payment.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:33'280 bytes
First seen:2022-08-25 18:57:23 UTC
Last seen:2022-08-25 19:42:51 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:sgk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJXyC+UgBy:Xk3hOdsylKlgxopeiBNhZFGzE+cL2kd6
TLSH T1D0E24DA2B296D906D98503764CE7C7D62727FCA16F67834B3289F71E1F72AC08903617
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:RAT RemcosRAT xls


Avatar
abuse_ch
RemcosRAT payload URLs:
https://aussieghana.com/dinner/Encrypted%20Client%20OG.jpg
https://aussieghana.com/dinner/Protected%20Client.vbs
https://aussieghana.com/dinner/attack.txt

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: 8
OLE dump

MalwareBazaar was able to identify 14 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3216 bytesSummaryInformation
416926 bytesWorkbook
5420 bytes_VBA_PROJECT_CUR/PROJECT
659 bytes_VBA_PROJECT_CUR/PROJECTwm
72578 bytes_VBA_PROJECT_CUR/VBA/IkVMg
81438 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92880 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
101272 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
11177 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
12332 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
13222 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
14522 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
AutoExecWorkbook_ActivateRuns when the Excel Workbook is opened
AutoExecWorksheet_ChangeRuns when the file is opened and ActiveX objects trigger events
SuspiciousCreateObjectMay create an OLE object
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
379
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Electronic Payment.xls
Verdict:
Malicious activity
Analysis date:
2022-08-25 18:58:13 UTC
Tags:
macros macros-on-open maldoc-20 opendir rat remcos
Link:
https://app.any.run/tasks/be69d0fa-dc54-4e21-a7fc-2bbd518995cd

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/301225/
Detection(s):
TwinWave.EvilDoc.OutRunThis.M2.20220121.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadMacro.httprevps.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD._IEX.210408.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.TakeMeHomeTonight.20210923.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OutRunThis.20220121.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Using the Windows Management Instrumentation requests
Creating a file
DNS request
Sending an HTTP GET request
Sending a custom TCP request
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching a process
Creating a process with a hidden window
Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)
Launching a process by exploiting the app vulnerability
Enabling autorun by creating a file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff/results/dashboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
anti-vm macros macros-on-open
Link:
https://www.filescan.io/uploads/6307c683b6f2a6ec1d640fd8/reports/37da3d08-d4c5-4aad-b113-c7d277553f4d/overview
Label:
Malicious
Suspicious Score:
6.1/10
Score Malicious:
61%
Score Benign:
39%
Link:
https://www.malware.ai/gui/files/?id=d3687baa-ece5-4d56-94ff-a942a1f0899b
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
PrivateLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1058024
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates processes via WMI
DLL side loading technique detected
Document contains an embedded VBA macro which may execute processes
Drops VBS files to the startup folder
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Powershell drops PE file
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
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Costura Assembly Loader
Yara detected PrivateLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 690538 Sample: Electronic Payment.xls Startdate: 26/08/2022 Architecture: WINDOWS Score: 100 49 ajohnston.duckdns.org 2->49 51 google.com 2->51 73 Multi AV Scanner detection for domain / URL 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Antivirus detection for URL or domain 2->77 79 10 other signatures 2->79 9 powershell.exe 12 7 2->9         started        14 powershell.exe 2->14         started        16 iexplore.exe 1 31 2->16         started        18 3 other processes 2->18 signatures3 process4 dnsIp5 53 aussieghana.com 139.99.167.206, 443, 49171, 49172 OVHFR Canada 9->53 45 C:\Users\user\AppData\Local\...\notepad.vbs, ASCII 9->45 dropped 87 Powershell drops PE file 9->87 20 wscript.exe 1 9->20         started        23 wscript.exe 14->23         started        25 iexplore.exe 14 16->25         started        28 iexplore.exe 18 18->28         started        file6 signatures7 process8 dnsIp9 81 Wscript starts Powershell (via cmd or directly) 20->81 83 Very long command line found 20->83 30 powershell.exe 9 20->30         started        35 powershell.exe 7 20->35         started        37 powershell.exe 23->37         started        39 powershell.exe 23->39         started        55 aussieghana.com 25->55 57 aussieghana.com 28->57 signatures10 process11 dnsIp12 61 aussieghana.com 30->61 47 C:\Users\user\AppData\...\AgileDotNetRT64.dll, PE32+ 30->47 dropped 65 Writes to foreign memory regions 30->65 67 DLL side loading technique detected 30->67 69 Injects a PE file into a foreign processes 30->69 41 notepad.exe 2 30->41         started        71 Drops VBS files to the startup folder 35->71 63 aussieghana.com 39->63 file13 signatures14 process15 dnsIp16 59 ajohnston.duckdns.org 23.105.131.237, 993 LEASEWEB-USA-NYC-11US United States 41->59 85 System process connects to network (likely due to code injection or exploit) 41->85 signatures17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff/
Threat name:
Document-Excel.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2022-08-25 18:58:06 UTC
File Type:
Document
Extracted files:
17
AV detection:
17 of 41 (41.46%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=gtcf7vcy73szdiejinhf244a6wcx7pp2zkhehbl5j3jn4mbe4h7q._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
macro macro_on_action
Link:
https://tria.ge/reports/220825-xmglfsaad2/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Blocklisted process makes network request
Process spawned unexpected child process
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/34c45fd458fee591a089434e5d7380f5857fbdfaca8e43857d4ed2de3024e1ff

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
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:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB

File information

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

  
URLhaus
https://urlhaus.abuse.ch/host/aussieghana.com/
Cape
Cape
https://www.capesandbox.com/analysis/301225/

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