MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125. 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: 16


Maldoc score: 16


Intelligence 16 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125
SHA3-384 hash: d88f3f5b4a5bc6d759778cf53eef4aebed0e9cbdcdf8670dd300605079a8cf7a362586d7397c0da835419533b1d5eb44
SHA1 hash: b02e8013f9695756d9fab1a5b677bbb39b3e48d7
MD5 hash: e12d4ea1d922a7bf268e0133163a92f6
humanhash: mike-batman-floor-don
File name:Payment Remittance.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:80'896 bytes
First seen:2022-08-18 06:23:47 UTC
Last seen:2022-08-18 06:29:54 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:4k3hOdsylKlgxopeiBNhZFGzE+cL2kdAw+ungFnoN46yVuKPWSiOpJ82pPA:4k3hOdsylKlgxopeiBNhZFGzE+cL2kdQ
TLSH T13F831752B3D6C806E9A7077489F2D6A63736FC409F13935F3246B72E1DB27848922717
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

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: 16
OLE dump

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

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
461537 bytesWorkbook
5416 bytes_VBA_PROJECT_CUR/PROJECT
659 bytes_VBA_PROJECT_CUR/PROJECTwm
71269 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
82762 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
91389 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
10186 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
11452 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
12483 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
13522 bytes_VBA_PROJECT_CUR/VBA/dir
144772 bytes_VBA_PROJECT_CUR/VBA/ieJOs
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
IOCUrhjg.batExecutable file name
SuspiciousOpenMay open a file
SuspiciousWriteMay write to a file (if combined with Open)
SuspiciousOutputMay write to a file (if combined with Open)
SuspiciouscreateMay execute file or a system command through WMI
SuspiciouscommandMay run PowerShell commands
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
299
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Payment Remittance.xls
Verdict:
Malicious activity
Analysis date:
2022-08-18 06:28:50 UTC
Tags:
macros macros-on-open opendir keylogger remcos
Link:
https://app.any.run/tasks/8cb9527d-accd-4ea8-9226-261a059a1009

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:
generic
Create hunting rule
Link:
https://www.capesandbox.com/analysis/299483/
Detection(s):
TwinWave.EvilDoc.MiscreantsTurnBackTime.20210220.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.EvilDoc.DMC12_GAUGE_SHELLAPP.20210901.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Creating a file
Launching a process
Running batch commands by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125/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/62fddb7a2093f7352868d44f/reports/77b02222-4985-48b2-a3da-113d9674cb7b/overview
Label:
Malicious
Suspicious Score:
5.7/10
Score Malicious:
57%
Score Benign:
43%
Link:
https://www.malware.ai/gui/files/?id=eb5be88f-dd15-4c26-9e4c-a2ea07cdca7d
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125
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.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1053626
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
DLL side loading technique detected
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
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)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Suspicious powershell command line found
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: 686154 Sample: Payment Remittance.xls Startdate: 18/08/2022 Architecture: WINDOWS Score: 100 50 google.com 2->50 66 Multi AV Scanner detection for domain / URL 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus detection for URL or domain 2->70 72 7 other signatures 2->72 11 EXCEL.EXE 53 15 2->11         started        15 iexplore.exe 1 33 2->15         started        17 wscript.exe 2->17         started        signatures3 process4 file5 46 C:\Users\user\Urhjg.bat, ASCII 11->46 dropped 48 C:\Users\user\...\Payment Remittance.xls, Composite 11->48 dropped 82 Document exploit detected (creates forbidden files) 11->82 19 cmd.exe 11->19         started        22 iexplore.exe 17 15->22         started        signatures6 process7 signatures8 74 Suspicious powershell command line found 19->74 76 Wscript starts Powershell (via cmd or directly) 19->76 24 powershell.exe 12 7 19->24         started        process9 dnsIp10 56 192.210.240.101, 49171, 49172, 49173 AS-COLOCROSSINGUS United States 24->56 44 C:\Users\user\AppData\Local\Temp\Remit.vbs, ASCII 24->44 dropped 80 Powershell drops PE file 24->80 29 wscript.exe 1 24->29         started        file11 signatures12 process13 signatures14 84 Wscript starts Powershell (via cmd or directly) 29->84 86 Very long command line found 29->86 32 powershell.exe 9 29->32         started        36 powershell.exe 7 29->36         started        process15 file16 42 C:\Users\user\AppData\...\AgileDotNetRT64.dll, PE32+ 32->42 dropped 58 Writes to foreign memory regions 32->58 60 DLL side loading technique detected 32->60 62 Injects a PE file into a foreign processes 32->62 38 RegAsm.exe 2 13 32->38         started        64 Drops VBS files to the startup folder 36->64 signatures17 process18 dnsIp19 52 saptransmissions.dvrlists.com 103.231.91.59, 49177, 55026 INTERGRID-AS-APIntergridGroupPtyLtdAU Australia 38->52 54 geoplugin.net 178.237.33.50, 49178, 80 ATOM86-ASATOM86NL Netherlands 38->54 78 Installs a global keyboard hook 38->78 signatures20
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125/
Threat name:
Document-Office.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2022-08-17 17:33:28 UTC
File Type:
Document
Extracted files:
18
AV detection:
5 of 39 (12.82%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=b33wzyifldegw3jvttm5va5i7y52fxbpgythir7u4gi2vjfkgesq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:augb22 macro macro_on_action rat
Link:
https://tria.ge/reports/220818-g52rcadec6/
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
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
saptransmissions.dvrlists.com:55026
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/0ef76ce10558/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/0ef76ce10558c86b6d359cd9da83a8fe3ba2dc2f36267447f4e191aaa4aa3125

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.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/299483/

Comments