MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6. 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: 13


Intelligence 11 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6
SHA3-384 hash: ef2ac839dbcf4cb3837b2e351eeefb08e27e6d8bdff59f4e7e23b766aa7749be3b5af4fabd01b899101eb3ad5da1128c
SHA1 hash: a82599599658b92f36c5565b1b527f2435c2b5dc
MD5 hash: 263195fc310f94e591f79c8a35e9b576
humanhash: river-robin-nuts-zulu
File name:PAYMENT REMITTANCE DETAIL.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:75'776 bytes
First seen:2021-10-19 14:13:16 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:r/k3hOdsylKlgxopeiBNhZFGzE+cL2kdAO1zI0ScDNzmVQyrnHRBoESK4nceC7rZ:r/k3hOdsylKlgxopeiBNhZFGzE+cL2k4
TLSH T128737CA6F6C1DC06CE69077A48F782E66626FC555F63828F324CF75E0F71AC0891261B
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: 13
OLE dump

MalwareBazaar was able to identify 10 sections in this file using oledump:

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
463724 bytesWorkbook
5422 bytes_VBA_PROJECT_CUR/PROJECT
662 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
82148 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92531 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
10520 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_OpenRuns when the Excel Workbook is opened
SuspiciousOpenMay open a file
SuspiciousOutputMay write to a file (if combined with Open)
SuspiciousCreateObjectMay create an OLE object
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
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 :
184
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/198560/
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.HTTP
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.START-BITSTRANSFER.210729.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.VBS.Obfus-176.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OdysseyAndBattle.20210707.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
macros macros-on-open
Link:
https://www.filescan.io/uploads/616ed2addb358dd15ec4d15b/reports/b5aad068-9746-4a29-9537-c5d72dce7cb5/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
expl.evad.troj.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/873403
Signature
Allocates memory in foreign processes
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Detected Remcos RAT
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Execution from Suspicious Folder
Sigma detected: Microsoft Office Product Spawning Windows Shell
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Obfuscated Powershell
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 505834 Sample: PAYMENT REMITTANCE DETAIL.xls Startdate: 19/10/2021 Architecture: WINDOWS Score: 100 36 lplazadtemins.duckdns.org 2->36 38 greenpayindia.com 2->38 42 Multi AV Scanner detection for domain / URL 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 13 other signatures 2->48 10 EXCEL.EXE 25 19 2->10         started        signatures3 process4 file5 34 C:\Users\Public\...\travelespecially.cmd, ASCII 10->34 dropped 64 Document exploit detected (creates forbidden files) 10->64 14 cmd.exe 1 10->14         started        signatures6 process7 process8 16 powershell.exe 28 14->16         started        18 conhost.exe 14->18         started        process9 20 brotherneed.exe 1 3 16->20         started        file10 28 C:\Users\user\AppData\Local\notepad.exe, PE32 20->28 dropped 30 C:\Users\user\AppData\...\brotherneed.exe, PE32 20->30 dropped 32 C:\Users\user\AppData\...\brotherneed.exe.log, ASCII 20->32 dropped 50 Writes to foreign memory regions 20->50 52 Allocates memory in foreign processes 20->52 54 Injects a PE file into a foreign processes 20->54 24 brotherneed.exe 2 20->24         started        signatures11 process12 dnsIp13 40 lplazadtemins.duckdns.org 194.147.140.45, 443, 49837, 49838 PTPEU unknown 24->40 56 Antivirus detection for dropped file 24->56 58 Multi AV Scanner detection for dropped file 24->58 60 Machine Learning detection for dropped file 24->60 62 5 other signatures 24->62 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6/
Threat name:
Document-Excel.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-10-19 14:14:05 UTC
AV detection:
14 of 43 (32.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=efz2qearx2ghbf2au5fgkz2kzhmekeglsp64sqju3cb4j5qwil3a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost macro macro_on_action persistence rat xlm
Link:
https://tria.ge/reports/211019-rj1bhagaa3/
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
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Adds Run key to start application
Downloads MZ/PE file
Executes dropped EXE
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
lplazadtemins.duckdns.org:443
Dropper Extraction:
http://greenpayindia.com/wp-conternt/ConsoleApp18.exe
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/2173a81011be/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/2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6

File information

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

Malspam

RemcosRAT

Excel file xls 2173a81011be8c709740a74a65674ac9d84510cb93fdc94134d883c4f61642f6

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/198560/

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