MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a. 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


CryptOne


Vendor detections: 13


Intelligence 13 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a
SHA3-384 hash: 53a6e5131a06b9a328fd88a462901bad54f60fe0f813675ba0c100c31d6a66dd19fdcb15a1dbf5c72cf920f7dfff47f1
SHA1 hash: d19a9a8edbce1e04232e441f8bb04e3e1e365435
MD5 hash: b6ff6d3caf28bf26d6968955b73ce011
humanhash: carpet-yellow-four-music
File name:NayroxFree.exe
Download: download sample
Signature CryptOne
Create hunting rule
File size:1'146'134 bytes
First seen:2025-06-16 17:07:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 8c16c795b57934183422be5f6df7d891 (36 x Mofksys, 18 x CryptOne, 6 x AveMariaRAT)
ssdeep 24576:PFOaQmMBpOlXsLcY729fwKIMSSzf+/I0A2SCOJJaXRH1Mv8tT8OoV:tUmMBElXsLR99M969A2SCOJJaXRH1MvV
TLSH T17235AE1B6BA400EDC577C1B8C56B8617F772741C0360AADB12E1D6652F23AD67B3EB02
TrID 42.6% (.EXE) Win32 Executable (generic) (4504/4/1)
19.4% (.ICL) Windows Icons Library (generic) (2059/9)
18.9% (.EXE) Generic Win/DOS Executable (2002/3)
18.9% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
dhash icon 00928e8e8686b800 (21 x Mofksys, 9 x CryptOne, 5 x Amadey)
Reporter burger
Tags:CryptOne exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
434
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
NayroxFree.exe
Verdict:
Malicious activity
Analysis date:
2025-06-16 17:07:30 UTC
Tags:
jeefo auto-reg
Link:
https://app.any.run/tasks/d7b0fc40-89db-4b7d-bfd1-4e04c7831323

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/9712/
Detection(s):
Win.Trojan.VBGeneric-6735875-0
Create hunting rule

Win.Trojan.Agent-1109049
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68504f5107b5e8c1cfe6f6fb
Tags:
blaster swisyn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a window
Creating a file in the Windows subdirectories
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Enabling the 'hidden' option for recently created files
Setting a single autorun event
Enabling a "Do not show hidden files" option
Verdict:
Malicious
Labled as:
Gosys.B
Link:
https://www.hybrid-analysis.com/sample/004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a
Malware family:
MOFKSYS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/dfb3a958-721e-4384-8815-ea25ae4ec7af
Result
Threat name:
CryptOne, Mofksys
Create hunting rule
Detection:
malicious
Classification:
spre.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1715752
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Detected CryptOne packer
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file has a writeable .text section
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Suspect Svchost Activity
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Mofksys
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1715752 Sample: NayroxFree.exe Startdate: 16/06/2025 Architecture: WINDOWS Score: 100 84 keyauth.win 2->84 86 googlecode.l.googleusercontent.com 2->86 88 3 other IPs or domains 2->88 108 Antivirus / Scanner detection for submitted sample 2->108 110 Multi AV Scanner detection for dropped file 2->110 112 Multi AV Scanner detection for submitted file 2->112 114 8 other signatures 2->114 11 NayroxFree.exe 1 3 2->11         started        15 svchost.exe 2->15         started        17 svchost.exe 4 2->17         started        19 4 other processes 2->19 signatures3 process4 file5 72 C:\Windows\Resources\Themes\icsys.icn.exe, MS-DOS 11->72 dropped 74 C:\Users\user\Desktop\nayroxfree.exe, PE32+ 11->74 dropped 128 Drops executables to the windows directory (C:\Windows) and starts them 11->128 21 icsys.icn.exe 3 11->21         started        25 nayroxfree.exe 1 11->25         started        130 Changes security center settings (notifications, updates, antivirus, firewall) 15->130 28 MpCmdRun.exe 15->28         started        30 WerFault.exe 2 17->30         started        signatures6 process7 dnsIp8 70 C:\Windows\Resources\Themes\explorer.exe, MS-DOS 21->70 dropped 116 Antivirus detection for dropped file 21->116 118 Drops executables to the windows directory (C:\Windows) and starts them 21->118 120 Drops PE files with benign system names 21->120 32 explorer.exe 15 21->32         started        90 keyauth.win 104.26.1.5, 443, 49716 CLOUDFLARENETUS United States 25->90 92 127.0.0.1 unknown unknown 25->92 37 cmd.exe 1 25->37         started        39 cmd.exe 1 25->39         started        41 conhost.exe 25->41         started        43 WerFault.exe 2 25->43         started        45 conhost.exe 28->45         started        file9 signatures10 process11 dnsIp12 78 142.250.31.82, 49724, 49730, 49733 GOOGLEUS United States 32->78 80 googlecode.l.googleusercontent.com 142.251.16.82, 49720, 49725, 49731 GOOGLEUS United States 32->80 82 142.251.163.82, 49721, 49728, 49732 GOOGLEUS United States 32->82 68 C:\Windows\Resources\spoolsv.exe, MS-DOS 32->68 dropped 102 Antivirus detection for dropped file 32->102 104 System process connects to network (likely due to code injection or exploit) 32->104 106 Drops PE files with benign system names 32->106 47 spoolsv.exe 3 32->47         started        51 certutil.exe 3 1 37->51         started        53 find.exe 1 37->53         started        55 find.exe 1 37->55         started        57 cmd.exe 1 39->57         started        file13 signatures14 process15 file16 76 C:\Windows\Resources\svchost.exe, MS-DOS 47->76 dropped 94 Antivirus detection for dropped file 47->94 96 Multi AV Scanner detection for dropped file 47->96 98 Drops executables to the windows directory (C:\Windows) and starts them 47->98 100 Drops PE files with benign system names 47->100 59 svchost.exe 2 2 47->59         started        62 conhost.exe 57->62         started        64 timeout.exe 1 57->64         started        signatures17 process18 signatures19 122 Antivirus detection for dropped file 59->122 124 Detected CryptOne packer 59->124 126 Drops executables to the windows directory (C:\Windows) and starts them 59->126 66 spoolsv.exe 59->66         started        process20
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a/
Threat name:
Win32.Trojan.Golsys
Create hunting rule
Status:
Malicious
First seen:
2025-06-16 17:07:31 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=abgiwyzmp7oqq6madpi2dm36ukkiidlenjwqinupdc56evvfggna._file
Verdict:
malicious
Label(s):
mofksys
Create hunting rule
Similar samples:
error
CryptOne
Result
Malware family:
n/a
Score:
  10/10
Tags:
defense_evasion discovery persistence
Link:
https://tria.ge/reports/250616-vm9acs1xas/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Executes dropped EXE
Modifies visiblity of hidden/system files in Explorer
Verdict:
Malicious
Tags:
trojan Win.Trojan.VBGeneric-6735875-0
YARA:
Windows_Generic_Threat_7526f106 Windows_Generic_Threat_cbe3313a
Link:
https://app.threat.zone/submission/2794edb3-a85c-4ad7-ae95-d46b45610579
Unpacked files
SH256 hash:
004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a
MD5 hash:
b6ff6d3caf28bf26d6968955b73ce011
SHA1 hash:
d19a9a8edbce1e04232e441f8bb04e3e1e365435
Link:
https://www.unpac.me/results/5ad4e94e-cb1e-401f-94a3-13203f790b7c/
SH256 hash:
8af599b7b0a732d38c5a71b7f1b7af36ccacca8d86551737554eb2e298d1dbbf
MD5 hash:
74513128cca19afcffb77dbec82e1ff3
SHA1 hash:
8669db33caff2e69c6951f8531594c5dcdbc3fa8
Link:
https://www.unpac.me/results/5ad4e94e-cb1e-401f-94a3-13203f790b7c/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/004c8b632c7f/report/overview.html
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/004c8b632c7fdd0879801bd1a1b37ea294840d646a6d04368f18bbe256a5319a

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:dsc
Create hunting rule
Author:Aaron DeVera
Description:Discord domains
Rule name:erbium
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked erbium malware samples.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:kutaki
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked kutaki malware samples.
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:SEH__vba
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:SUSP_Imphash_Mar23_2
Create hunting rule
Author:Arnim Rupp (https://github.com/ruppde)
Description:Detects imphash often found in malware samples (Zero hits with with search for 'imphash:x p:0' on Virustotal)
Reference:Internal Research
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:Windows_Generic_Threat_7526f106
Create hunting rule
Author:Elastic Security
Rule name:Windows_Generic_Threat_cbe3313a
Create hunting rule
Author:Elastic Security

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/9712/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
CHECK_TRUST_INFORequires Elevated Execution (level:requireAdministrator)high
Reviews
IDCapabilitiesEvidence
VB_APILegacy Visual Basic API usedMSVBVM60.DLL::__vbaCopyBytes
MSVBVM60.DLL::__vbaSetSystemError
MSVBVM60.DLL::__vbaExitProc
MSVBVM60.DLL::__vbaObjSetAddref
MSVBVM60.DLL::EVENT_SINK_AddRef
MSVBVM60.DLL::__vbaFileOpen

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