MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1. 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 File information Comments
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SHA256 hash: 6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1
SHA3-384 hash: b6178d77072866bbb7aaba0ceed43b7a044932dbed5b6d0d3ad534160829a9684642c2de71f7c4c4a8384dbe0841429d
SHA1 hash: 83706ebb950281641dc61b6f23b34144dfb58f1a
MD5 hash: c8ca268ff29389fa0c0d2df4af7eeba6
humanhash: robin-bluebird-magnesium-music
File name:Remittance details.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:33'792 bytes
First seen:2022-04-28 06:10:49 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:Lggk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJcP3nYTqVrQm5gumZ7C:L7k3hOdsylKlgxopeiBNhZFGzE+cL2kt
TLSH T137E24EA2B786D90AD94907764CE7C6E63327FC519FA3834B3289F71E1F71A808D12617
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: 8
OLE dump

MalwareBazaar was able to identify 15 sections in this file using oledump:

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
417200 bytesWorkbook
5463 bytes_VBA_PROJECT_CUR/PROJECT
680 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
81615 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92743 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
101584 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
11151 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
12214 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
13220 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
14562 bytes_VBA_PROJECT_CUR/VBA/dir
151711 bytes_VBA_PROJECT_CUR/VBA/pnBCr
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
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
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)

Intelligence

File Origin
# of uploads :
1
# of downloads :
193
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/267378/
Detection(s):
SecuriteInfo.com.Macro.Exec-2.UNOFFICIAL
Create hunting rule

TwinWave.GetObjectStringManipulationDontMessAroundWithJim.20200804.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
Creating a window
Сreating 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
Creating a process with a hidden window
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1/results/dashboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/626a30095c1970f8bbe010ce/reports/b805d405-d522-4325-b6aa-0293f8ef793b/overview
Label:
Malicious
Suspicious Score:
6.6/10
Score Malicious:
66%
Score Benign:
34%
Link:
https://www.malware.ai/gui/files/?id=45b8ae96-664d-492b-97d7-0d129a18793f
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/984537
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
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 contains an embedded VBA macro which may execute processes
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 domain / URL
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious PowerShell Cmdline
Sigma detected: Suspicious PowerShell Sub Processes
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
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: 617038 Sample: Remittance details.xls Startdate: 28/04/2022 Architecture: WINDOWS Score: 100 43 google.com 2->43 57 Multi AV Scanner detection for domain / URL 2->57 59 Found malware configuration 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 13 other signatures 2->63 10 EXCEL.EXE 53 13 2->10         started        14 iexplore.exe 1 33 2->14         started        16 wscript.exe 2->16         started        signatures3 process4 file5 39 C:\Users\user\...\Remittance details.xls, Composite 10->39 dropped 69 Suspicious powershell command line found 10->69 18 powershell.exe 12 7 10->18         started        22 iexplore.exe 14 14->22         started        signatures6 process7 dnsIp8 45 mckinneytighe.com 72.48.234.249, 49173, 49174, 49175 GRANDECOM-AS1US United States 18->45 37 C:\Users\user\AppData\Local\...\notepads.vbs, ASCII 18->37 dropped 24 wscript.exe 1 18->24         started        file9 process10 signatures11 65 Wscript starts Powershell (via cmd or directly) 24->65 67 Very long command line found 24->67 27 powershell.exe 7 24->27         started        31 powershell.exe 7 24->31         started        process12 dnsIp13 47 mckinneytighe.com 27->47 71 Writes to foreign memory regions 27->71 73 Injects a PE file into a foreign processes 27->73 33 RegAsm.exe 2 27->33         started        75 Drops VBS files to the startup folder 31->75 signatures14 process15 dnsIp16 41 hawmans.cc.dvrlists.com 23.105.131.220, 162, 49177 LEASEWEB-USA-NYC-11US United States 33->41 49 Contains functionality to steal Chrome passwords or cookies 33->49 51 Contains functionality to inject code into remote processes 33->51 53 Contains functionality to register a low level keyboard hook 33->53 55 2 other signatures 33->55 signatures17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1/
Threat name:
Win32.Downloader.Powdow
Create hunting rule
Status:
Malicious
First seen:
2022-04-28 06:11:07 UTC
File Type:
Document
Extracted files:
19
AV detection:
3 of 41 (7.32%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=n2sqjbm5v62hplawxak6ga74cikhekmods66ob57fevtimxmedqq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:new money rat
Link:
https://tria.ge/reports/220428-gxk4mabbd3/
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
Blocklisted process makes network request
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
hawmans.cc.dvrlists.com:162
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/6ea504859daf/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/6ea504859dafb477ac16b815e303fc121472298e1cbde707bf292b3432ec20e1

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/267378/

Comments