MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b98d2919533ab614a7571aa0ef7c80fc177218bb778524fde3bf6f72b0d7b08. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
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SHA256 hash: 4b98d2919533ab614a7571aa0ef7c80fc177218bb778524fde3bf6f72b0d7b08
SHA3-384 hash: 49c95d7f30d46624ba1d1630a056f8a7318e0739f3d055d81bdf4ee8c30b31ae82543983e04310f7b2fe0789e5cf98bf
SHA1 hash: 9d04eb7712599db741e8e85d9f4339219b991e6a
MD5 hash: ad27be427dd7f922143e57fd1fa64f98
humanhash: yankee-ten-solar-pluto
File name:HmZaGFzbUY_invoice_a_202.js
Download: download sample
Signature RemcosRAT
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File size:860'871 bytes
First seen:2022-07-29 14:32:59 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 12288:ifY8It0lbvO1PJ9XyuRrvafaI8ieJaU4I79VXHv0aIn83IHiz0:iubAaIoUCI
TLSH T11905AE318B84AB8EAB981C4FD07E6B1E72F31716C162B2CC97A33907356ED1C5B19D49
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
395
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.PUA.JS.Obfus-2183.UNOFFICIAL
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Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
cmd.exe eventvwr.exe fingerprint greyware keylogger obfuscated shell32.dll
Link:
https://www.filescan.io/uploads/62e3f05f6336465f2af3e6b9/reports/76b955de-cd8f-4c4a-bc79-afc5e520828a/overview
Result
Verdict:
SUSPICIOUS
Result
Threat name:
Remcos
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Detection:
malicious
Classification:
evad.rans.troj.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1043171
Signature
Antivirus detection for dropped file
Benign windows process drops PE files
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
Contains functionalty to change the wallpaper
Delayed program exit found
Installs a global keyboard hook
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
Potential obfuscated javascript found
Wscript called in batch mode (surpress errors)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 675662 Sample: HmZaGFzbUY_invoice_a_202.js Startdate: 29/07/2022 Architecture: WINDOWS Score: 100 44 geoplugin.net 2->44 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for dropped file 2->52 54 Multi AV Scanner detection for submitted file 2->54 56 3 other signatures 2->56 10 wscript.exe 3 2->10         started        14 windowsjx.exe 2->14         started        16 windowsjx.exe 2->16         started        18 windowsjx.exe 2->18         started        signatures3 process4 file5 40 C:\Users\user\AppData\...\invoice_a_202.exe, PE32 10->40 dropped 42 C:\Users\user\AppData\Roaming\bQiNiwTuYc.js, ASCII 10->42 dropped 66 Benign windows process drops PE files 10->66 68 Wscript called in batch mode (surpress errors) 10->68 20 invoice_a_202.exe 5 4 10->20         started        24 wscript.exe 1 10->24         started        signatures6 process7 file8 36 C:\ProgramData\Remcos\windowsjx.exe, PE32 20->36 dropped 38 C:\Users\user\AppData\Local\...\install.vbs, data 20->38 dropped 58 Antivirus detection for dropped file 20->58 60 Multi AV Scanner detection for dropped file 20->60 62 Contains functionalty to change the wallpaper 20->62 64 6 other signatures 20->64 26 wscript.exe 1 20->26         started        signatures9 process10 process11 28 cmd.exe 1 26->28         started        process12 30 windowsjx.exe 2 515 28->30         started        34 conhost.exe 28->34         started        dnsIp13 46 185.157.162.75, 49741, 62186 OBE-EUROPEObenetworkEuropeSE Sweden 30->46 48 geoplugin.net 178.237.33.50, 49745, 80 ATOM86-ASATOM86NL Netherlands 30->48 70 Antivirus detection for dropped file 30->70 72 Multi AV Scanner detection for dropped file 30->72 74 Contains functionalty to change the wallpaper 30->74 76 5 other signatures 30->76 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b98d2919533ab614a7571aa0ef7c80fc177218bb778524fde3bf6f72b0d7b08/
Threat name:
Script.Trojan.Heuristic
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Status:
Malicious
First seen:
2022-07-29 14:34:05 UTC
File Type:
Text (JavaScript)
AV detection:
5 of 38 (13.16%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jomnfemvgovwcstvogva556ib7axoimlw54fet66hp3pokynpmea._file
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos botnet:powerpoint persistence rat
Link:
https://tria.ge/reports/220729-rwva1sade9/
Behaviour
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
185.157.162.75:62186
Malware family:
Remcos
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4b98d2919533/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/4b98d2919533ab614a7571aa0ef7c80fc177218bb778524fde3bf6f72b0d7b08

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:SUSP_Double_Base64_Encoded_Executable
Create hunting rule
Author:Florian Roth
Description:Detects an executable that has been encoded with base64 twice
Reference:https://twitter.com/TweeterCyber/status/1189073238803877889
Rule name:SUSP_Double_Base64_Encoded_Executable_RID34CC
Create hunting rule
Author:Florian Roth
Description:Detects an executable that has been encoded with base64 twice
Reference:https://twitter.com/TweeterCyber/status/1189073238803877889
Rule name:SUSP_obfuscated_JS_obfuscatorio
Create hunting rule
Author:@imp0rtp3
Description:Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:https://obfuscator.io

File information

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

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