MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8. 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: 8


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

SHA256 hash: fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8
SHA3-384 hash: 31ba2b5db39c4e3376631612fd512d5126bdd57517828b930892c42d2185c786eb6381b9d30158b802534be43adbb265
SHA1 hash: de72363a6fe7927f87031128467af431d3ef5c23
MD5 hash: 9824a8ff2390f5dedee5601363511d9f
humanhash: mango-pip-massachusetts-winter
File name:Remittance Advice.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:41'472 bytes
First seen:2022-05-06 15:54:54 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:amk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJqqd/7eh9ZGimMCpmDQ:vk3hOdsylKlgxopeiBNhZFGzE+cL2kdD
TLSH T1D41352A2B396D806D995073A4CE3C6E63736FC516F53C34B3289F71E1F76AC08902656
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:RemcosRAT xls


Avatar
abuse_ch
Payload URLs:
http://pinchpunch.co/1/Encrypted Client OG.jpg
http://pinchpunch.co/2/attack.txt
http://pinchpunch.co/3/Protected Client.vbs

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 19 sections in this file using oledump:

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
418574 bytesWorkbook
5538 bytes_VBA_PROJECT_CUR/PROJECT
692 bytes_VBA_PROJECT_CUR/PROJECTwm
797 bytes_VBA_PROJECT_CUR/UserForm1/CompObj
8265 bytes_VBA_PROJECT_CUR/UserForm1/VBFrame
938 bytes_VBA_PROJECT_CUR/UserForm1/f
100 bytes_VBA_PROJECT_CUR/UserForm1/o
11991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
123581 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
131479 bytes_VBA_PROJECT_CUR/VBA/UserForm1
143385 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
152266 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
16190 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
171210 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
18516 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
19834 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
SuspiciousCreateObjectMay create an OLE object
SuspiciousExecMay run an executable file or a system
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 :
1
# of downloads :
298
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Remittance Advice.xls
Verdict:
Malicious activity
Analysis date:
2022-05-06 17:42:04 UTC
Tags:
macros maldoc-20
Link:
https://app.any.run/tasks/684b14f9-9601-4951-b5e9-27574aa455bb

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:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/269109/
Detection(s):
SecuriteInfo.com.Macro.Exec-2.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.EMOCROSelfRefDontUseJelly.202000929.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RemcosBite.M2.20220408.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OdysseyAndBattle.20210707.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
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Searching for synchronization primitives
DNS request
Sending an HTTP GET request
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching a process
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/627544f0be0219041a754c2d/reports/04e6f219-c2af-4a2d-a01a-aa0b90eff2ef/overview
Gathering data
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8
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:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/989169
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
DLL side loading technique detected
Document contains an embedded macro with GUI obfuscation
Document contains an embedded VBA macro which may execute processes
Document contains OLE streams with names of living off the land binaries
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
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)
Very long command line found
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Costura Assembly Loader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 621665 Sample: Remittance Advice.xls Startdate: 06/05/2022 Architecture: WINDOWS Score: 100 45 google.com 2->45 55 Found malware configuration 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 Antivirus detection for URL or domain 2->59 61 9 other signatures 2->61 10 EXCEL.EXE 189 20 2->10         started        14 iexplore.exe 1 33 2->14         started        16 wscript.exe 2->16         started        signatures3 process4 file5 41 C:\Users\user\Desktop\Remittance Advice.xls, Composite 10->41 dropped 77 Suspicious powershell command line found 10->77 18 powershell.exe 12 7 10->18         started        23 iexplore.exe 14 14->23         started        signatures6 process7 dnsIp8 47 pinchpunch.co 107.150.28.226, 49173, 49174, 49175 ASN-QUADRANET-GLOBALUS United States 18->47 39 C:\Users\user\AppData\Local\...\notepad.vbs, ASCII 18->39 dropped 63 Powershell drops PE file 18->63 25 wscript.exe 1 18->25         started        file9 signatures10 process11 signatures12 73 Wscript starts Powershell (via cmd or directly) 25->73 75 Very long command line found 25->75 28 powershell.exe 9 25->28         started        33 powershell.exe 7 25->33         started        process13 dnsIp14 53 pinchpunch.co 28->53 43 C:\Users\user\AppData\...\AgileDotNetRT64.dll, PE32+ 28->43 dropped 79 Writes to foreign memory regions 28->79 81 DLL side loading technique detected 28->81 83 Injects a PE file into a foreign processes 28->83 35 notepad.exe 2 9 28->35         started        85 Drops VBS files to the startup folder 33->85 file15 signatures16 process17 dnsIp18 49 waterz08.dvrlists.com 79.134.225.80, 2682, 49177 FINK-TELECOM-SERVICESCH Switzerland 35->49 51 geoplugin.net 178.237.33.50, 49178, 80 ATOM86-ASATOM86NL Netherlands 35->51 65 System process connects to network (likely due to code injection or exploit) 35->65 67 Contains functionality to steal Chrome passwords or cookies 35->67 69 Contains functionality to steal Firefox passwords or cookies 35->69 71 Delayed program exit found 35->71 signatures19
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8/
Threat name:
Document-Excel.Downloader.Woreflint
Create hunting rule
Status:
Malicious
First seen:
2022-05-05 17:09:44 UTC
File Type:
Document
Extracted files:
23
AV detection:
7 of 41 (17.07%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7l6xiyzfinj2pzhkjealsp2bf64exo65vzzq7qkfyvbtd2zfgp4a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:dollarthursday rat
Link:
https://tria.ge/reports/220506-tcr3naaah5/
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 FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Loads dropped DLL
Blocklisted process makes network request
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
waterz08.dvrlists.com:2682
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fafd74632543/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/fafd7463254353a7e4ea4900b93f412fb84bbbddae730fc145c54331eb2533f8

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:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:TA505_Maldoc_21Nov_2
Create hunting rule
Author:Arkbird_SOLG
Description:invitation (1).xls
Reference:https://twitter.com/58_158_177_102/status/1197432303057637377

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/pinchpunch.co/
Cape
Cape
https://www.capesandbox.com/analysis/269109/

Comments