MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 84631c19d18475754bdfe649b0ff41d3adbaf473fa9c732833cf4f8942df291a. 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


Intelligence 11 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 84631c19d18475754bdfe649b0ff41d3adbaf473fa9c732833cf4f8942df291a
SHA3-384 hash: a51ec293a8de363a439780d7fefb4fa18179676d602767a0b9952065b8877a8406f58d2b467f29095201b580386347dc
SHA1 hash: 03b45bcdf03ed70f4e104bd3f225d12a03b6e925
MD5 hash: 75a02afa5e738911d017952a619b626b
humanhash: quiet-undress-pasta-mountain
File name:Rulmeca RFQ_CVE6535_TVOP-MIO,pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:574'120 bytes
First seen:2021-05-14 11:53:50 UTC
Last seen:2021-05-14 12:02:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash da84464fb1fefd0829e366a614c59044 (2 x RemcosRAT, 1 x NetWire, 1 x Formbook)
ssdeep 6144:Tc/Z6uWRs695nvBqHMbeqMBgLh06/yz0Utp2G0kyq731CGU9hZ5iTCcFse:I/Z6Ls6TrMKt060cGn17l6nIFj
Threatray 1'888 similar samples on MalwareBazaar
TLSH 63C48DE2E2F00472D62F5D749C4A7674A822BD512EDA04B567F87E888F397C52C0B64F
Reporter GovCERT_CH
Tags:RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
111
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Rulmeca RFQ_CVE6535_TVOP-MIO,pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-05-14 11:54:59 UTC
Tags:
installer
Link:
https://app.any.run/tasks/81643296-080f-4e66-8322-7428139c6611

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/156577/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
DNS request
Sending a custom TCP request
Creating a file
Deleting a recently created file
Launching a process
Running batch commands
Creating a process with a hidden window
Launching cmd.exe command interpreter
Creating a process from a recently created file
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt 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
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/781808
Signature
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
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
Creates a thread in another existing process (thread injection)
Detected Remcos RAT
DLL side loading technique detected
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files to the user root directory
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suspicious powershell command line found
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 414204 Sample: Rulmeca RFQ_CVE6535_TVOP-MI... Startdate: 14/05/2021 Architecture: WINDOWS Score: 100 61 prayerarequesttojah.ddns.net 2->61 81 Found malware configuration 2->81 83 Malicious sample detected (through community Yara rule) 2->83 85 Multi AV Scanner detection for dropped file 2->85 87 7 other signatures 2->87 12 Rulmeca RFQ_CVE6535_TVOP-MIO,pdf.exe 1 25 2->12         started        17 Vbpekg.exe 16 2->17         started        19 Vbpekg.exe 16 2->19         started        signatures3 process4 dnsIp5 65 onedrive.live.com 12->65 73 2 other IPs or domains 12->73 51 C:\Users\Public\Vbpekg\Vbpekg.exe, PE32 12->51 dropped 53 C:\Users\Public53etplwiz.exe, PE32+ 12->53 dropped 55 C:\Users\Public55ETUTILS.dll, PE32+ 12->55 dropped 103 Writes to foreign memory regions 12->103 105 Allocates memory in foreign processes 12->105 107 Creates a thread in another existing process (thread injection) 12->107 21 cmd.exe 1 12->21         started        23 mobsync.exe 2 12->23         started        67 192.168.2.1 unknown unknown 17->67 69 onedrive.live.com 17->69 75 2 other IPs or domains 17->75 109 Multi AV Scanner detection for dropped file 17->109 111 Machine Learning detection for dropped file 17->111 113 Injects a PE file into a foreign processes 17->113 27 mobsync.exe 17->27         started        71 onedrive.live.com 19->71 77 2 other IPs or domains 19->77 29 ieinstal.exe 19->29         started        file6 signatures7 process8 dnsIp9 31 cmd.exe 5 21->31         started        35 conhost.exe 21->35         started        63 prayerarequesttojah.ddns.net 23.105.131.132, 4344, 49731, 49732 LEASEWEB-USA-NYC-11US United States 23->63 89 Contains functionality to steal Chrome passwords or cookies 23->89 91 Contains functionality to capture and log keystrokes 23->91 93 Contains functionality to inject code into remote processes 23->93 95 Contains functionality to steal Firefox passwords or cookies 23->95 signatures10 process11 file12 57 C:\Windows \System3257etplwiz.exe, PE32+ 31->57 dropped 59 C:\Windows \System3259ETUTILS.dll, PE32+ 31->59 dropped 79 Drops executables to the windows directory (C:\Windows) and starts them 31->79 37 Netplwiz.exe 31->37         started        39 conhost.exe 31->39         started        signatures13 process14 process15 41 cmd.exe 1 37->41         started        signatures16 97 Suspicious powershell command line found 41->97 99 Adds a directory exclusion to Windows Defender 41->99 44 powershell.exe 26 41->44         started        47 conhost.exe 41->47         started        process17 signatures18 101 DLL side loading technique detected 44->101 49 conhost.exe 44->49         started        process19
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/84631c19d18475754bdfe649b0ff41d3adbaf473fa9c732833cf4f8942df291a/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2021-05-14 11:24:53 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qrrrygorqr2xks674ze3b72b2ow3v5dt7kohgkbtz5hysqw7fena._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
17c742f29afb5c4352f3fb0079fbb0b2d72da1e65cfc59695f9a7259088b4615
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3483cf3d7087f312aa5e6de882cd7893e2add074a30158141173a242443cd6c0
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52fa8487efeb8b203fb1f37501c366088b71de4ded620695ba2e34e8c0f446a2
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9e226f4878d21f5b1497b6c0d69e452f8a531634b3f8951e51049b5b4cafa8f7
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bfe422f569af77aa4f5b1b9f1e85f6c89b7ca62540c368d5e5b152f68154a478
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d67dde5621d6de76562bc2812f04f986b441601b088aa936d821c0504eb4f7aa
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e65bff9943ab7ccc3713619a8d908f6caf5392c0c47defe3b66ca9009d2177ed
RemcosRAT
+ 1'878 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210514-4cw5xw2qvj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
prayerarequesttojah.ddns.net:4344
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/84631c19d18475754bdfe649b0ff41d3adbaf473fa9c732833cf4f8942df291a

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:INDICATOR_KB_CERT_56f008e69a7c4c3feb389c66eaf58259
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:MALWARE_Win_DLAgent07
Create hunting rule
Author:ditekSHen
Description:Detects delf downloader agent

File information

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

Malspam

RemcosRAT

Executable exe 84631c19d18475754bdfe649b0ff41d3adbaf473fa9c732833cf4f8942df291a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/156577/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-14 12:03:01 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0001.032] Anti-Behavioral Analysis::Timing/Delay Check GetTickCount
1) [B0009.029] Anti-Behavioral Analysis::Instruction Testing
2) [F0002.002] Collection::Polling
4) [C0026.002] Data Micro-objective::XOR::Encode Data
6) [C0051] File System Micro-objective::Read File
7) [C0052] File System Micro-objective::Writes File
8) [C0007] Memory Micro-objective::Allocate Memory
9) [C0036.004] Operating System Micro-objective::Create Registry Key::Registry
10) [C0036.003] Operating System Micro-objective::Open Registry Key::Registry
11) [C0036.006] Operating System Micro-objective::Query Registry Value::Registry
12) [C0038] Process Micro-objective::Create Thread
13) [C0041] Process Micro-objective::Set Thread Local Storage Value
14) [C0018] Process Micro-objective::Terminate Process