MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23. 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


PureCrypter


Vendor detections: 14


Intelligence 14 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23
SHA3-384 hash: ab9a6724108fb0b140f9f8db42a716c04073e8cf5f788d75d8db082f3bf6c4e31f606a30a36c027fe2be0fa8f7b83266
SHA1 hash: 505e50ec33b5090d26dd0c8ae76799e084df9b1d
MD5 hash: 99232110e2c1136d21de63d376b8bf8b
humanhash: saturn-aspen-princess-steak
File name:Ycyfafmudke.exe
Download: download sample
Signature PureCrypter
Create hunting rule
File size:96'768 bytes
First seen:2025-10-21 05:50:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 1536:Q8WVBT3ZJlQf42hpH/hrCJJ05jLSoENphxdG4SGiYKgrL4/hA0:uppJ0jCJJFoENphxdGdvhZ/7
Threatray 2'111 similar samples on MalwareBazaar
TLSH T10893086DA3C5DEB7D5EA0A3398C2EB49C7B0D1139707E34A29D80EE80D1EBD61501A77
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter lowmal3
Tags:exe purecrypter

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Ycyfafmudke.exe
Verdict:
No threats detected
Analysis date:
2025-10-21 06:02:16 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/f0f10ece-f89a-4dff-8fc1-6ba340b34161

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/33579/
Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68f71f44ad6ce0f5ad403a42
Tags:
smartassembly autorun packed hype
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt to an infection source
DNS request
Connection attempt
Sending an HTTP GET request
Sending a custom TCP request
Creating a file in the %AppData% directory
Launching a process
Creating a window
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Query of malicious DNS domain
Sending a TCP request to an infection source
Stealing user critical data
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 obfuscated obfuscated packed packed smartassembly smart_assembly
Link:
https://www.filescan.io/uploads/68f71fde3a79800405ed960f/reports/0a62fe95-9679-4e28-8b64-882c5f0a7bec/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-20T13:12:00Z UTC
Last seen:
2025-10-22T13:16:00Z UTC
Hits:
~100
Detections:
PDM:Trojan.Win32.Generic Trojan-PSW.MSIL.Agentb.sb Trojan.MSIL.Inject.sb Trojan.MSIL.Dnoper.sb HEUR:Trojan-PSW.MSIL.PureLogs.gen Trojan-PSW.Win32.Stelega.sb Trojan-PSW.Win32.DarkCloud.sb Trojan-PSW.MSIL.PureLogs.sb Trojan.MSIL.Agent.sb HackTool.ReconScan.TCP.ServerRequest
Link:
https://opentip.kaspersky.com/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/78568de6-d9b0-4663-b535-6a3a152d82db
Result
Threat name:
DarkCloud, PureLog Stealer, ResolverRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1798893
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Drops VBS files to the startup folder
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected DarkCloud
Yara detected Generic Dropper
Yara detected PureLog Stealer
Yara detected ResolverRAT
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1798893 Sample: Ycyfafmudke.exe Startdate: 21/10/2025 Architecture: WINDOWS Score: 100 30 showip.net 2->30 32 energytulcea.ro 2->32 38 Malicious sample detected (through community Yara rule) 2->38 40 Antivirus detection for URL or domain 2->40 42 Multi AV Scanner detection for submitted file 2->42 44 12 other signatures 2->44 8 wscript.exe 1 2->8         started        11 Ycyfafmudke.exe 15 5 2->11         started        signatures3 process4 dnsIp5 52 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->52 15 KeySize.exe 14 2 8->15         started        36 energytulcea.ro 185.171.186.168, 443, 49690, 49693 GTSCEGTSCentralEuropeAntelGermanyCZ Romania 11->36 24 C:\Users\user\AppData\Roaming\KeySize.exe, PE32 11->24 dropped 26 C:\Users\user\AppData\Roaming\...\KeySize.vbs, ASCII 11->26 dropped 28 C:\Users\user\...\KeySize.exe:Zone.Identifier, ASCII 11->28 dropped 54 Drops VBS files to the startup folder 11->54 56 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 11->56 18 InstallUtil.exe 15 11->18         started        file6 signatures7 process8 dnsIp9 58 Multi AV Scanner detection for dropped file 15->58 60 Writes to foreign memory regions 15->60 62 Injects a PE file into a foreign processes 15->62 21 InstallUtil.exe 12 15->21         started        34 showip.net 162.55.60.2, 49691, 49695, 80 ACPCA United States 18->34 64 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 18->64 66 Tries to steal Mail credentials (via file / registry access) 18->66 signatures10 process11 signatures12 46 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 21->46 48 Tries to steal Mail credentials (via file / registry access) 21->48 50 Tries to harvest and steal browser information (history, passwords, etc) 21->50
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23
Verdict:
inconclusive
YARA:
11 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.41 Win 32 Exe x86
Link:
https://app.malva.re/file/99232110e2c1136d21de63d376b8bf8b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23/
Verdict:
Malicious
Threat:
Family.DARKCLOUD
Link:
https://tip.neiki.dev/file/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-10-21 01:04:28 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
27 of 38 (71.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mzqxdlkefjvr5jkfsmwcknft6htwxl6n77uyfsjtnghjbqonx4rq._file
Verdict:
malicious
Label(s):
unc_loader_078
Create hunting rule
Similar samples:
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f26b15aa89c33b3ceabfdbd1e2dbc1a1759587add95183baba90ca4d0607d6d2
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fafb279267341316da74ca14e296523a68736c3e7ca6ac96b7ba788a22b30882
PureCrypter
+ 2'101 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/251021-gk9apaft2a/
Behaviour
Suspicious use of AdjustPrivilegeToken
Program crash
System Location Discovery: System Language Discovery
Unpacked files
SH256 hash:
666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23
MD5 hash:
99232110e2c1136d21de63d376b8bf8b
SHA1 hash:
505e50ec33b5090d26dd0c8ae76799e084df9b1d
Detections:
PureCrypter_Stage1
Create hunting rule
Link:
https://www.unpac.me/results/bb8dcc6b-8401-453c-8184-66f69c60cf9a/
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/666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23

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:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with SmartAssembly
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

PureCrypter

Executable exe 666171ad442a6b1ea545932c2534b3f1e76bafcdffe982c933698e90c1cdbf23

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/33579/

Comments