MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921
SHA3-384 hash: 843a1af2702978eaeb8d20b222b98eb717d7d9a6aece4f81b6dab2edb6b694b169d94c0412dac4d8e36169b9936c8326
SHA1 hash: cdb2fa02b24118d0c501a4bf6479a57e9b941c3c
MD5 hash: 6b04befe5957d4a3513447ae0eadbcd3
humanhash: violet-tango-charlie-two
File name:Product Catalogue.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:802'664 bytes
First seen:2023-03-20 08:01:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 24576:4PSxu2EYvZOwbfeT/FmkSYTU5Nb+Ca75Et:h4Yx1rW/F8D6Ca75I
Threatray 599 similar samples on MalwareBazaar
TLSH T18B05011C1B3162CAE56482F58580C6F18FE27D1E341FDB5D2CC13BE7F158B8A9A41E6A
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter cocaman
Tags:exe QUOTATION RemcosRAT signed

Code Signing Certificate

Organisation:kgb.black
Issuer:kgb.black
Algorithm:sha256WithRSAEncryption
Valid from:2023-03-20T02:10:26Z
Valid to:2024-03-20T02:10:26Z
Serial number: a54f9d3c260f4035c938590bef8c53fd
Thumbprint Algorithm:SHA256
Thumbprint: decd5b3fb711f4a6fac9dedc852902c5bef570f8640931574e056d82b2eb9083
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
239
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Product Catalogue.exe
Verdict:
Malicious activity
Analysis date:
2023-03-20 08:03:50 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/72c3cfe0-cb15-4a8e-aff8-edfb34cd01e6

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/375806/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a file
Launching a process
Creating a process from a recently created file
Creating a service
Loading a system driver
Changing a file
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Enabling autorun for a service
Blocking the User Account Control
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/641812fbda1bbe29caf921cc/reports/e5d07b21-5619-4aca-b7d3-4b1692cb9fef/overview
Verdict:
Malicious
Link:
https://www.hybrid-analysis.com/sample/4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921
Result
Verdict:
UNKNOWN
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/8ca2f558-dd0b-42cb-b859-d4e22bb4820d
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1197420
Signature
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Disables UAC (registry)
Drops PE files with benign system names
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample is not signed and drops a device driver
Sigma detected: Remcos
Sigma detected: Schedule system process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 830320 Sample: Product_Catalogue.exe Startdate: 20/03/2023 Architecture: WINDOWS Score: 100 84 Malicious sample detected (through community Yara rule) 2->84 86 Antivirus detection for URL or domain 2->86 88 Multi AV Scanner detection for submitted file 2->88 90 8 other signatures 2->90 9 Product_Catalogue.exe 1 7 2->9         started        13 svchost.exe 3 2->13         started        15 svchost.exe 4 2->15         started        17 3 other processes 2->17 process3 dnsIp4 70 C:\Users\user\AppData\Roaming\svchost.exe, PE32+ 9->70 dropped 72 C:\Users\user\...\Product_Catalogue.exe.log, CSV 9->72 dropped 104 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 9->104 106 Drops PE files with benign system names 9->106 20 cmd.exe 1 9->20         started        22 cmd.exe 1 9->22         started        108 Machine Learning detection for dropped file 13->108 110 Writes to foreign memory regions 13->110 112 Adds a directory exclusion to Windows Defender 13->112 25 conhost.exe 13->25         started        74 C:\Windows\Temp\ptwvfp53.inf, Windows 15->74 dropped 114 Injects a PE file into a foreign processes 15->114 27 powershell.exe 15->27         started        29 cmstp.exe 15->29         started        31 MSBuild.exe 15->31         started        35 19 other processes 15->35 78 192.168.2.1 unknown unknown 17->78 76 C:\Windows\Temp\fqvzwhpz.inf, Windows 17->76 dropped 33 powershell.exe 17->33         started        37 4 other processes 17->37 file5 signatures6 process7 signatures8 39 svchost.exe 5 5 20->39         started        43 conhost.exe 20->43         started        45 timeout.exe 1 20->45         started        92 Uses schtasks.exe or at.exe to add and modify task schedules 22->92 47 conhost.exe 22->47         started        49 schtasks.exe 1 22->49         started        51 conhost.exe 27->51         started        53 conhost.exe 33->53         started        process9 file10 66 C:\Users\user\AppData\Local\Temp\?????.sys, PE32+ 39->66 dropped 94 Writes to foreign memory regions 39->94 96 Adds a directory exclusion to Windows Defender 39->96 98 Disables UAC (registry) 39->98 100 2 other signatures 39->100 55 jsc.exe 39->55         started        60 powershell.exe 39->60         started        62 RegSvcs.exe 39->62         started        signatures11 process12 dnsIp13 80 51.75.209.245, 2406, 49698 OVHFR France 55->80 82 geoplugin.net 178.237.33.50, 49699, 80 ATOM86-ASATOM86NL Netherlands 55->82 68 C:\ProgramData\remcos\logs.dat, data 55->68 dropped 102 Installs a global keyboard hook 55->102 64 conhost.exe 60->64         started        file14 signatures15 process16
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921/
Threat name:
Win64.Trojan.BadNetLdr
Create hunting rule
Status:
Malicious
First seen:
2023-03-20 08:02:56 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
9
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jnkaoxzkryuskmhhoqpnhyw2r4f2ccrzg37dmqxgkht5n65rbeqq._file
Verdict:
unknown
Similar samples:
0a0debbbfe0c321661a6f911fc895997b512405cb9ba90c41f547dc410733b6b
RemcosRAT
3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc
RemcosRAT
85bc631d0e67651ca8d58602830378a006b44a898ec008da40c26f8928e378ec
RemcosRAT
aa0e0b9735614a120e1d49cd292470953e32f8d7b3fd299c0f7561400c4da72f
RemcosRAT
bc9a80c327839012274d763d66186497685a6b73e0b20eea73c720d61f5c9407
RemcosRAT
ddcfd6bd425a2ab84afef1a8443c3a9c858502d6eaa882c6f4cb830784d779b6
RemcosRAT
e88243eed45dce02cc948299bc673e2d7166390a23570c520258151ea5259863
RemcosRAT
efa6869eaa796429cbd684b030cb6873262f6009997fe6f4c20ebd69b4ad54b6
RemcosRAT
fe14ae75b872e1b4419de4aac769c767a5d23479d2bd6c957be5648ad802a246
RemcosRAT
+ 589 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost evasion persistence rat trojan
Link:
https://tria.ge/reports/230320-jw4wfscd84/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System policy modification
Uses Task Scheduler COM API
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Maps connected drives based on registry
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Uses the VBS compiler for execution
Windows security modification
Looks for VMWare Tools registry key
Sets service image path in registry
Looks for VirtualBox Guest Additions in registry
Remcos
UAC bypass
Windows security bypass
Malware Config
C2 Extraction:
51.75.209.245:2406
Unpacked files
SH256 hash:
4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921
MD5 hash:
6b04befe5957d4a3513447ae0eadbcd3
SHA1 hash:
cdb2fa02b24118d0c501a4bf6479a57e9b941c3c
Link:
https://www.unpac.me/results/73bafd98-1349-4bf8-8867-81997bda0f40/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4b54075f2a8e/report/overview.html
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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Malspam

RemcosRAT

ace 17b4d4ca21f00476cc685afc5d3e50c05dee6cb254bed429993ee57750abf6be

RemcosRAT

Executable exe 4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 17b4d4ca21f00476cc685afc5d3e50c05dee6cb254bed429993ee57750abf6be
Cape
Cape
https://www.capesandbox.com/analysis/375806/
  
Dropped by
MD5 15df5f20d08886946782d1d4a6b47641

Comments