MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 233c2a594ffa1e444ba1835a06e4a332610b52cfbe27c99bc8f211430188c015. 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

ValleyRAT

Vendor detections: 12

Intelligence 12 IOCs 1 YARA 9 File information Comments

SHA256 hash:	233c2a594ffa1e444ba1835a06e4a332610b52cfbe27c99bc8f211430188c015
SHA3-384 hash:	b487c549f80b887c15427e4dc332cb32b81c3b3f825ee9e372864eee0d1bc4113bf69912dabd2a48d5b0c8bca9f2f5a0
SHA1 hash:	5d8cfeb5fa7a5a16c5368c781eecf4c0e204edd7
MD5 hash:	f84ca31ce06e46703cd1a0fe969409df
humanhash:	march-equal-eighteen-don
File name:	letsvpn.msi
Download:	download sample
Signature	ValleyRAT Create hunting rule
File size:	21'167'616 bytes
First seen:	2025-08-22 23:41:37 UTC
Last seen:	2025-08-23 18:00:25 UTC
File type:	msi
MIME type:	application/x-msi
ssdeep	393216:u8yd2t9zr8t8GFMhpppPi7P26RzIcdwQuiQDlwg0S+B7Pnnzmqyh:uxsYS+MBpgP2k0EwQul+dCqG
Threatray	62 similar samples on MalwareBazaar
TLSH	T1CC271320759DC232F66F05B19929DA2AE53C7DE30B7004EB93E4F95A6A314C25739F83
TrID	80.0% (.MSI) Microsoft Windows Installer (454500/1/170) 10.7% (.MST) Windows SDK Setup Transform script (61000/1/5) 7.8% (.MSP) Windows Installer Patch (44509/10/5) 1.4% (.) Generic OLE2 / Multistream Compound (8000/1)
Magika	msi
Reporter	aachum
Tags:	CHN donutloader msi SilverFox ValleyRAT VoidArachne winos

iamaachum

https://hckuailian.com.cn/ => https://userdowm.com/letsvpn => https://8.148.81.2:57896/letsvpn/letsvpn.msi

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOC	ThreatFox Reference
156.239.14.198:8863	https://threatfox.abuse.ch/ioc/1572870/

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/23106/

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68a9007ce9d9dbcfd96d2a9c

Tags:

shellcode dropper farfli virus

Verdict:

Unknown

Threat level:

2.5/10

Confidence:

100%

Tags:

base64 cmd lolbin msiexec threat

Link:

https://www.filescan.io/uploads/68a900394a87ed796768be9e/reports/b86ceec3-0eb4-4465-a413-c79506153181/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/233c2a594ffa1e444ba1835a06e4a332610b52cfbe27c99bc8f211430188c015

Verdict:

Malicious

File Type:

msi

First seen:

2025-08-18T19:49:00Z UTC

Last seen:

2025-08-18T19:49:00Z UTC

Hits:

~10

Detections:

Trojan.Win64.DonutInjector.sb Trojan.Win64.Donut.sb Trojan.Win32.Shellcode.sb Trojan.Win32.Inject.sb Trojan.Win32.Agentc.bp Backdoor.Win32.Xkcp.a Backdoor.Agent.TCP.C&C

Link:

https://opentip.kaspersky.com/233c2a594ffa1e444ba1835a06e4a332610b52cfbe27c99bc8f211430188c015/results?tab=lookup

Result

Threat name:

n/a

Detection:

malicious

Classification:

n/a

Score:

48 / 100

Link:

https://www.joesandbox.com/analysis/1763304

Signature

Multi AV Scanner detection for submitted file

Behaviour

Behavior Graph:

Download SVG

Score:

33%

Verdict:

Susipicious

File Type:

Result

Malware family:

n/a

Score:

6/10

Tags:

discovery persistence privilege_escalation

Link:

https://tria.ge/reports/250822-3qb32aen3z/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Event Triggered Execution: Installer Packages

System Location Discovery: System Language Discovery

Loads dropped DLL

Enumerates connected drives

Verdict:

Unknown

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/ef25668a-a425-437f-ac13-ab8ccd465790

Malware family:

ValleyRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/233c2a594ffa/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/233c2a594ffa1e444ba1835a06e4a332610b52cfbe27c99bc8f211430188c015

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:	CP_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__QueryInfo Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	Detect_MSI_LATAM_Banker_From_LatAm Create hunting rule

Rule name:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	NET Create hunting rule
Author:	malware-lu

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)