MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125. 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: 13


Intelligence 13 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125
SHA3-384 hash: 4ad4083f4ae57062a3943268ffcb2a58464834ff56ef64827454b65ec684a44c68308a2492f5bde34a4037af4f50bea6
SHA1 hash: 91f41eb2367697b521ce433bfa8b848537277ad4
MD5 hash: 99a3a6d730fd4832211eea1df80bc502
humanhash: yankee-winner-table-romeo
File name:file
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:3'401'216 bytes
First seen:2023-03-16 12:39:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:tICIZ273tNz8sIqNmqauufLuxKZKtu1Dze6HDpLXQlYztOimQQVWyAOBESe4EfTm:vfNSlXbONhEp+ZLEgO0
TLSH T19FF57CB172DAFF97C2AF1F75801435004C608467A3AEE749FDC825976AD2724EE1C6B2
TrID 62.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
8.9% (.EXE) Win64 Executable (generic) (10523/12/4)
8.4% (.EXE) DOS Borland compiled Executable (generic) (10000/1/2)
5.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
File icon (PE):PE icon
dhash icon 848e034dcc96d468 (1 x RemcosRAT)
Reporter jstrosch
Tags:.NET exe MSIL RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
257
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2023-03-16 12:41:53 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e86ff825-fb9e-4dbf-a65a-e49c51ea2849

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/374764/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Creating a file
DNS request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending a TCP request to an infection source
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/64130e2d71b58075e0261525/reports/c3b3a0e0-460c-49d8-ab87-c8c611b75f4d/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125
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.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/81d05919-a846-4dff-b9f9-5de5da8c4ac1
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1194921
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Encrypted powershell cmdline option found
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
Snort IDS alert for network traffic
Yara detected Generic Downloader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 827823 Sample: file.exe Startdate: 16/03/2023 Architecture: WINDOWS Score: 100 48 Snort IDS alert for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for URL or domain 2->52 54 5 other signatures 2->54 7 file.exe 1 7 2->7         started        11 Bzqruuz.exe 4 2->11         started        13 Bzqruuz.exe 3 2->13         started        process3 file4 38 C:\Users\user\AppData\Roaming\...\Bzqruuz.exe, PE32 7->38 dropped 40 C:\Users\user\...\Bzqruuz.exe:Zone.Identifier, ASCII 7->40 dropped 42 C:\Users\user\AppData\Local\...\file.exe.log, ASCII 7->42 dropped 56 Encrypted powershell cmdline option found 7->56 58 Injects a PE file into a foreign processes 7->58 15 file.exe 1 14 7->15         started        18 powershell.exe 16 7->18         started        60 Multi AV Scanner detection for dropped file 11->60 62 Machine Learning detection for dropped file 11->62 20 powershell.exe 13 11->20         started        22 Bzqruuz.exe 11->22         started        24 Bzqruuz.exe 11->24         started        26 powershell.exe 13 13->26         started        28 Bzqruuz.exe 13->28         started        30 Bzqruuz.exe 13->30         started        signatures5 process6 dnsIp7 44 80.66.75.51, 2290, 49706 RISS-ASRU Russian Federation 15->44 46 geoplugin.net 178.237.33.50, 49707, 80 ATOM86-ASATOM86NL Netherlands 15->46 32 conhost.exe 18->32         started        34 conhost.exe 20->34         started        36 conhost.exe 26->36         started        process8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125/
Threat name:
Win32.Trojan.Nekark
Create hunting rule
Status:
Malicious
First seen:
2023-03-15 21:26:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ied3nxyyqssow6xkxzkxihab4sdluc2ektezzkxmb3leoamkmesq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost persistence rat upx
Link:
https://tria.ge/reports/230316-pv75dada9z/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
UPX packed file
Remcos
Malware Config
C2 Extraction:
80.66.75.51:2290
Unpacked files
SH256 hash:
4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125
MD5 hash:
99a3a6d730fd4832211eea1df80bc502
SHA1 hash:
91f41eb2367697b521ce433bfa8b848537277ad4
Link:
https://www.unpac.me/results/9e3223cf-c05a-40c1-a62f-f5e4bc2934d4/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4107b6df1884/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/4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.

File information

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

Web download

RemcosRAT

Executable exe 4107b6df1884a4eb7aeabe55741c01e486ba0b4454c99caaec0ed647018a6125

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/374764/

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