MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7. 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: 4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7
SHA3-384 hash: c6eeda1b9f52d5fa83d630b6311caf5c1745c42558be1043aec63846cd69682ac40955c587f164f3ebbafaa2c01b7f89
SHA1 hash: 11e3d697fd25f1c2fc1d35aaf3af70e23dbf9e3c
MD5 hash: be0def7d91c8f70c433e5b0a9ad3b64e
humanhash: kentucky-island-high-lake
File name:remittance advice.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:75'264 bytes
First seen:2021-10-08 09:39:28 UTC
Last seen:2021-10-08 10:47:04 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:wk3hOdsylKlgxopeiBNhZFGzE+cL2kdA3tzI0ScDNzmVQyrnHRBoESK4nceC7r9S:wk3hOdsylKlgxopeiBNhZFGzE+cL2kda
TLSH T116738CA6F6C1DC06CEA9037A49F782D66626FC551F53938F3248F75E4F70AC0892261B
Reporter madjack_red
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
463108 bytesWorkbook
5422 bytes_VBA_PROJECT_CUR/PROJECT
662 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
82104 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92527 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 :
2
# of downloads :
222
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
remittance advice.xls
Verdict:
Malicious activity
Analysis date:
2021-10-08 09:40:41 UTC
Tags:
macros macros-on-open opendir loader rat remcos keylogger
Link:
https://app.any.run/tasks/3949d370-d5c2-4fd4-8d28-c119e8cae587

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/196104/
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.HTTP
Create hunting rule

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

TwinWave.EvilDoc.CHR_AEONONANDON.20210930.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/4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7/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/616011f6e3d213d202bb54ec/reports/0ccf4ed5-c2cd-4d41-b0c2-cc509cc2f788/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7
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.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
expl.evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/866992
Signature
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Found malware configuration
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
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
Yara detected Obfuscated Powershell
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 499420 Sample: remittance advice.xls Startdate: 08/10/2021 Architecture: WINDOWS Score: 100 34 lplazadtemins.duckdns.org 2->34 36 greenpayindia.com 2->36 38 Multi AV Scanner detection for domain / URL 2->38 40 Found malware configuration 2->40 42 Malicious sample detected (through community Yara rule) 2->42 44 11 other signatures 2->44 10 EXCEL.EXE 25 19 2->10         started        signatures3 process4 file5 32 C:\Users\Public\Documents\southernrock.cmd, ASCII 10->32 dropped 50 Document exploit detected (creates forbidden files) 10->50 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 callscore.exe 1 2 16->20         started        file10 28 C:\Users\user\AppData\Local\taskmgr.exe, PE32 20->28 dropped 30 C:\Users\user\AppData\Local\...\callscore.exe, PE32 20->30 dropped 23 callscore.exe 20->23         started        26 callscore.exe 20->26         started        process11 signatures12 46 Multi AV Scanner detection for dropped file 23->46 48 Machine Learning detection for dropped file 23->48
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7/
Threat name:
Script-Macro.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-10-08 00:57:46 UTC
File Type:
Document
Extracted files:
14
AV detection:
15 of 26 (57.69%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jrqlwnvipcjzf5gszfj7bdnmbiafnygesoqfqreb5u75jkkgzllq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost macro macro_on_action persistence rat spyware stealer xlm
Link:
https://tria.ge/reports/211008-lm78madhbm/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
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
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Executes dropped EXE
NirSoft WebBrowserPassView
Nirsoft
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
lplazadtemins.duckdns.org:443
Dropper Extraction:
http://greenpayindia.com/grren/ConsoleApp17.exe
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/4c60bb36a878/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/4c60bb36a8789392f4d2c953f08dac0a0056e0c493a0584481ed3fd4a946cad7

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/196104/

Comments