MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f. 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: 14


Intelligence 14 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f
SHA3-384 hash: fca58870182d6e87467269de4c1ed3e7ca534a7e1a2fedce798cd055373669433ddfbf3bbb925ebebb9b8aee3045d795
SHA1 hash: 58d9da251f4466a6cd9fb7fb7f0cbb196425db2e
MD5 hash: 0c7d9bbd0cfe3621f076aae883009e36
humanhash: december-crazy-juliet-lion
File name:FACTURA.xlsx
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:2'130'920 bytes
First seen:2024-12-10 06:02:54 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 49152:oEjkXhHug9Kj/w6M3G8swX4aBLiLS2ORvvLwxhpnIeHW:bQXhOWur8RXLLD2xxPIH
TLSH T1B9A533D5DC51634BDCF842F2CAF4786A158DD4D98CC4CF543AEADBA102818D8BAF8267
TrID 61.2% (.XLSX) Excel Microsoft Office Open XML Format document (34000/1/7)
31.5% (.ZIP) Open Packaging Conventions container (17500/1/4)
7.2% (.ZIP) ZIP compressed archive (4000/1)
Magika xlsx
Reporter abuse_ch
Tags:CVE-2018-0798 RemcosRAT xlsx

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 dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section IDSection sizeSection name
A12840840 bytesOle10Native
A20 bytesVU3jluXN

Intelligence

File Origin
# of uploads :
1
# of downloads :
3'111
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
FACTURA.xlsx
Verdict:
No threats detected
Analysis date:
2024-12-10 06:19:26 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/90c8a7e7-7dcf-43f8-afcc-ddb89bb44f18

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6757d9994a662cb5265743dc
Tags:
autorun autoit remcos
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Using the Windows Management Instrumentation requests
Creating a window
Searching for synchronization primitives
Launching a process
DNS request
Connection attempt by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
OOXML Excel File with Embedding Objects
Link:
https://app.docguard.net/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f/results/dashboard
Behaviour
BlacklistAPI detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Labled as:
CVE-2018-0798
Link:
https://www.hybrid-analysis.com/sample/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f
Gathering data
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f
Details
Document With No Content
Document contains little or no semantic information.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1572126
Signature
Antivirus / Scanner detection for submitted sample
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
Found malware configuration
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Shellcode detected
Sigma detected: Drops script at startup location
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Suspicious Binary In User Directory Spawned From Office Application
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1572126 Sample: FACTURA.xlsx Startdate: 10/12/2024 Architecture: WINDOWS Score: 100 78 192.210.150.26 AS-COLOCROSSINGUS United States 2->78 90 Found malware configuration 2->90 92 Malicious sample detected (through community Yara rule) 2->92 94 Antivirus / Scanner detection for submitted sample 2->94 96 17 other signatures 2->96 15 EXCEL.EXE 7 11 2->15         started        18 wscript.exe 1 2->18         started        signatures3 process4 file5 76 C:\Users\user\Desktop\~$FACTURA.xlsx, data 15->76 dropped 21 EQNEDT32.EXE 12 15->21         started        86 Windows Scripting host queries suspicious COM object (likely to drop second stage) 18->86 26 outvaunts.exe 18->26         started        signatures6 process7 dnsIp8 80 grupodulcemar.pe 161.132.57.101, 443, 49163 RedCientificaPeruanaPE Peru 21->80 82 www.grupodulcemar.pe 21->82 70 C:\Users\user\AppData\Local\Temp\kudo.exe, PE32 21->70 dropped 72 C:\Users\user\...\HKP098767890HJ[1].exe, PE32 21->72 dropped 104 Installs new ROOT certificates 21->104 106 Office equation editor establishes network connection 21->106 108 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 21->108 28 kudo.exe 6 21->28         started        110 Binary is likely a compiled AutoIt script file 26->110 32 outvaunts.exe 26->32         started        file9 signatures10 process11 file12 74 C:\Users\user\AppData\Local\...\outvaunts.exe, PE32 28->74 dropped 118 Multi AV Scanner detection for dropped file 28->118 120 Binary is likely a compiled AutoIt script file 28->120 34 outvaunts.exe 3 28->34         started        38 outvaunts.exe 32->38         started        signatures13 process14 file15 68 C:\Users\user\AppData\...\outvaunts.vbs, data 34->68 dropped 98 Multi AV Scanner detection for dropped file 34->98 100 Binary is likely a compiled AutoIt script file 34->100 102 Drops VBS files to the startup folder 34->102 40 outvaunts.exe 2 34->40         started        43 outvaunts.exe 38->43         started        signatures16 process17 signatures18 114 Binary is likely a compiled AutoIt script file 40->114 45 outvaunts.exe 2 40->45         started        48 outvaunts.exe 43->48         started        process19 signatures20 122 Binary is likely a compiled AutoIt script file 45->122 50 outvaunts.exe 2 45->50         started        53 outvaunts.exe 48->53         started        process21 signatures22 88 Binary is likely a compiled AutoIt script file 50->88 55 outvaunts.exe 2 50->55         started        58 outvaunts.exe 53->58         started        process23 signatures24 112 Binary is likely a compiled AutoIt script file 55->112 60 outvaunts.exe 2 55->60         started        63 outvaunts.exe 58->63         started        process25 signatures26 116 Binary is likely a compiled AutoIt script file 60->116 65 outvaunts.exe 2 60->65         started        process27 signatures28 84 Binary is likely a compiled AutoIt script file 65->84
Score:
100%
Verdict:
Malware
File Type:
OFFICE
Link:
https://malprob.io/report/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f/
Threat name:
Document-Excel.Exploit.CVE-2018-0798
Create hunting rule
Status:
Malicious
First seen:
2024-12-09 16:48:18 UTC
File Type:
Document
Extracted files:
18
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wmto5a2nh2ocpjlrfoi36kfmpcpkr5yv37ixzsqm23imyxxrrspq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
unknown_loader_036
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery
Link:
https://tria.ge/reports/241210-gr1xwszrek/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
System Location Discovery: System Language Discovery
Blocklisted process makes network request
Verdict:
Suspicious
Tags:
exploit
YARA:
INDICATOR_OLE_EXPLOIT_CVE_2017_11882_1
Link:
https://app.threat.zone/submission/ec0901b7-a6d8-42e9-b6d1-3e58963b77e9
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b326ee834d3e/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/b326ee834d3e9c27a5712b91bf28ac789ea8f715dfd17cca0cd6d0cc5ef18c9f

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:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:Warp
Create hunting rule
Author:Seth Hardy
Description:Warp
Rule name:WarpStrings
Create hunting rule
Author:Seth Hardy
Description:Warp Identifying Strings

File information

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

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