MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333. 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: 11

Intelligence 11 IOCs YARA 16 File information Comments

SHA256 hash:	cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333
SHA3-384 hash:	26c9fe933d27ac8bad74404ebace8e6564402f83fbc952e2d7e1140d3c9bef545013982ec702809462d3de9f78d500a6
SHA1 hash:	3243fb84a11143e574696e23eb114b4467275c35
MD5 hash:	dcd580118706ee497e645311915996b0
humanhash:	butter-kitten-foxtrot-delaware
File name:	ZillberReleyHost.exe
Download:	download sample
Signature	ValleyRAT Create hunting rule
File size:	30'413'728 bytes
First seen:	2026-10-09 03:24:25 UTC
Last seen:	Never
File type:	exe
MIME type:	application/vnd.microsoft.portable-executable
imphash	230a8cb70f5fc6f4574e4c22b6277a01 (1 x ValleyRAT)
ssdeep	786432:CguB4HZNU3SCPSqcvJj5xRD5znOQTlfwuUeRADS3:1uSZeCOg/5znlTlfwuLcW
TLSH	T199672310EAD782B5C65127F905796ADEF4765E1C032418FBFFD92D0EA079BF484B02A2
TrID	21.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 21.2% (.EXE) Win64 Executable (generic) (6522/11/2) 16.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 14.6% (.EXE) Win32 Executable (generic) (4504/4/1) 6.6% (.ICL) Windows Icons Library (generic) (2059/9)
Magika	pebin
dhash icon	133b7b63634b5943 (3 x ValleyRAT)
Reporter	Ling
Tags:	exe SilverFox ValleyRAT

CNGaoLing

SilverFox
IOC (IP 161.248.15.160:80)

Intelligence

File Origin

# of uploads :

# of downloads :

259

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

n/a

ID:

File name:

exe

Verdict:

Malicious activity

Analysis date:

2026-10-09 03:33:06 UTC

Tags:

valleyrat rat silverfox winos

Link:

https://app.any.run/tasks/a53551d9-0a80-4a1a-a050-63b8b65b3fca

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Result

Verdict:

Malware

Maliciousness:

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

evasive microsoft_visual_cc overlay packed reconnaissance

Link:

https://www.filescan.io/uploads/6ac85ea24adbbf8f31b7961a/reports/db6df30d-ed07-44c0-8b3c-f4fe58fccd7b/overview

Verdict:

Malicious

Labled as:

Doina.Generic

Link:

https://www.hybrid-analysis.com/sample/cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333

Verdict:

Unknown

File Type:

exe x32

First seen:

2026-09-08T01:23:00Z UTC

Last seen:

2026-10-10T23:23:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333/results?tab=lookup

Score:

94%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333

Gathering data

Threat name:

Win32.Trojan.Ravartar

Status:

Malicious

First seen:

2026-10-09 03:25:33 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

15 of 24 (62.50%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=z6ik3dxpdnz6m5hv3o6bf6f3ytxa5pblssc535ppht245br7kmzq._file

Verdict:

malicious

Label(s):

ValleyRAT

Link:

https://reports.threatray.com/434a7b5f-64ca-4289-ab5e-42b0bc53d9ca

Result

Malware family:

valleyrat_s2

Score:

10/10

Tags:

family:valleyrat_s2 backdoor discovery

Link:

https://tria.ge/reports/261009-dysnbaxyez/

Behaviour

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Reads the TCP/IP host and domain name from the registry

System Location Discovery: System Language Discovery

Checks computer location settings

Executes dropped EXE

Family: ValleyRat

Malware Config

C2 Extraction:

161.248.15.160:80
161.248.15.160:443
127.0.0.1:80

Malware family:

ValleyRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/cf90ad8eef1b/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Legit

Score:

0.00

Link:

https://yomi.yoroi.company/submissions/cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333

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:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

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

Rule name:	GenericGh0st Create hunting rule
Author:	Still

Rule name:	Gh0stKCP Create hunting rule
Author:	Netresec
Description:	Detects HP-Socket ARQ and KCP implementations, which are used in Gh0stKCP. Forked from @stvemillertime's KCP catchall rule.
Reference:	https://netresec.com/?b=259a5af

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	Indicator_MiniDumpWriteDump Create hunting rule
Author:	Obscurity Labs LLC
Description:	Detects PE files and PowerShell scripts that use MiniDumpWriteDump either through direct imports or string references

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

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

Rule name:	TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE Create hunting rule
Author:	CYFARE
Description:	Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:	https://cyfare.net/

Rule name:	ValleyRAT Create hunting rule
Author:	NDA0E
Description:	Detects ValleyRAT

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	Windows_Generic_Threat_4b0b73ce Create hunting rule
Author:	Elastic Security

Rule name:	WinosStager Create hunting rule
Author:	YungBinary
Description:	https://www.esentire.com/blog/winos4-0-online-module-staging-component-used-in-cleversoar-campaign

Rule name:	WIN_Malware_ACRStealer_ForgeAuto_1084c837_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects ACRStealer (pe, etat extrait)

Rule name:	WIN_Malware_Unknown_ForgeAuto_4286e0e1_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat extrait)

Rule name:	WIN_Malware_Unknown_ForgeAuto_598a7881_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat extrait)

File information

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

Web download

ValleyRAT

exe cf90ad8eef1b73e674f5dbbc12f8bbc4ee0ebc2b9485ddf5ef3cf5ce863f5333

(this sample)

Delivery method

Distributed via web download

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