MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b65b0ef6e5df94c275433e72f1fd9e3c549b313210c6542cbd319e5399fbd26. 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: 7


Intelligence 7 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b65b0ef6e5df94c275433e72f1fd9e3c549b313210c6542cbd319e5399fbd26
SHA3-384 hash: c99603616c20deb67429a85911673c4d1e3ca7e96b9fb40e821b191af99f02475936c714880c22458af7f6741ed9556c
SHA1 hash: 50451b39ded78a3e2f35c4948da89d225806f7e6
MD5 hash: 7a13f6e8dcd590f979315122fe1d0744
humanhash: winter-pasta-chicken-tango
File name:7a13f6e8dcd590f979315122fe1d0744.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:590'336 bytes
First seen:2020-11-09 07:40:17 UTC
Last seen:2020-11-15 22:57:58 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:7djBI0pQLuXqqeA7XQOVUWjd/TjclCV3Li09zDT:dBVxXqqe4XNVhjdXn3
TLSH 08C4E1CDF60087B8D82916B068754C7113253EB598E09B7D7A8DF3FA2BF32A51116E27
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
RemcosRAT C2:
ndma.chickenkiller.com:31411 (213.152.161.149)

Intelligence

File Origin
# of uploads :
4
# of downloads :
82
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.DownLoader35.23515.30511.17846.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Creating a file
Launching a process
DNS request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending a TCP request to an infection source
Unauthorized injection to a system process
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Remcos
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Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/525959
Signature
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Detected Remcos RAT
Drops PE files to the user root directory
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 312069 Sample: wdNVE34zv2.exe Startdate: 09/11/2020 Architecture: WINDOWS Score: 100 30 Malicious sample detected (through community Yara rule) 2->30 32 Multi AV Scanner detection for submitted file 2->32 34 Detected Remcos RAT 2->34 36 3 other signatures 2->36 6 wdNVE34zv2.exe 1 3 2->6         started        10 flybat.exe 1 2->10         started        12 flybat.exe 2->12         started        process3 file4 22 C:\Users\user\flybat.exe, PE32 6->22 dropped 24 C:\Users\user\flybat.exe:Zone.Identifier, ASCII 6->24 dropped 26 C:\Users\user\AppData\...\wdNVE34zv2.exe.log, ASCII 6->26 dropped 38 Drops PE files to the user root directory 6->38 40 Writes to foreign memory regions 6->40 42 Maps a DLL or memory area into another process 6->42 44 Hides that the sample has been downloaded from the Internet (zone.identifier) 6->44 14 RegAsm.exe 2 6->14         started        46 Multi AV Scanner detection for dropped file 10->46 48 Machine Learning detection for dropped file 10->48 18 RegAsm.exe 10->18         started        20 RegAsm.exe 12->20         started        signatures5 process6 dnsIp7 28 ndma.chickenkiller.com 213.152.161.149, 31411, 49713 GLOBALLAYERNL Netherlands 14->28 50 Contains functionalty to change the wallpaper 14->50 52 Contains functionality to steal Chrome passwords or cookies 14->52 54 Contains functionality to capture and log keystrokes 14->54 56 2 other signatures 14->56 signatures8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b65b0ef6e5df94c275433e72f1fd9e3c549b313210c6542cbd319e5399fbd26/
Threat name:
Win32.Backdoor.Rescoms
Create hunting rule
Status:
Malicious
First seen:
2020-11-09 07:42:06 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jns3b33olx4uyj2ugpts6h6z4pcutmyteeggkqwl2mm6kom7xuta._file
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201109-rdmc71kbrn/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Remcos
Malware Config
C2 Extraction:
ndma.chickenkiller.com:31411
Please note that we are no longer able to provide a coverage score for Virus Total.

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:ach_RemcosRAT
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Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Web download

RemcosRAT

Executable exe 4b65b0ef6e5df94c275433e72f1fd9e3c549b313210c6542cbd319e5399fbd26

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/587553/
  
Delivery method
Distributed via web download

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