MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327. 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: 9

Intelligence 9 IOCs YARA 26 File information Comments

SHA256 hash:	83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327
SHA3-384 hash:	3b72d8ee7b638d0f764085b177a755206db4c86280768db28ff051597078c35937d3b4949d2beb0ce9523479ffcbc6f4
SHA1 hash:	6d64daac659498745b7f76ff7f1d09e80e0eafef
MD5 hash:	9d56be0a712cfcf3dd4338156269acb0
humanhash:	four-arkansas-nuts-fillet
File name:	install_s.8.09.exe
Download:	download sample
Signature	ValleyRAT Create hunting rule
File size:	29'522'384 bytes
First seen:	2026-09-13 12:12:26 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	c329cfdce996b315359260e710fbdc76 (11 x ValleyRAT, 3 x SliverFox)
ssdeep	98304:zClvSIQotY1jJ6I/EQ+LxsE3WajDxlaEO:OlvSIQDbcQ+LxzmaJlHO
TLSH	T12257294AFFD1CF42E9A6867898775B103373E8A54B71C3C7125461382D973C88EF2A99
TrID	33.1% (.EXE) Win64 Executable (generic) (6522/11/2) 25.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 10.4% (.ICL) Windows Icons Library (generic) (2059/9) 10.3% (.EXE) OS/2 Executable (generic) (2029/13) 10.1% (.EXE) Generic Win/DOS Executable (2002/3)
Magika	pebin
Reporter	Ling
Tags:	exe SilverFox ValleyRAT

CNGaoLing

SilverFox
IOC (kgxzgh.net) (msi8s0.oss-cn-beijing.aliyuncs.com) (mm2027.oss-cn-hangzhou.aliyuncs.com) (new2027.oss-cn-hongkong.aliyuncs.com)

Intelligence

File Origin

# of uploads :

# of downloads :

153

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

gh0st

ID:

File name:

exe

Verdict:

Malicious activity

Analysis date:

2026-09-13 12:15:51 UTC

Tags:

delphi golang rat gh0st stego payload auto-sch auto-reg uac

Link:

https://app.any.run/tasks/715cfaa0-6435-4842-b2e4-d6cefd83ac5b

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/85243/

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

base64 evasive

Link:

https://www.filescan.io/uploads/6aa69362fa2af7a4cb306798/reports/a03c1c21-ab7a-4c0d-9f35-a64b1c1e4c88/overview

Verdict:

Malicious

Labled as:

Yogi.Generic

Link:

https://www.hybrid-analysis.com/sample/83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327

Verdict:

Malicious

File Type:

exe x64

First seen:

2026-09-13T08:20:00Z UTC

Last seen:

2026-09-13T08:39:00Z UTC

Hits:

~10

Detections:

HEUR:Trojan-Dropper.Win32.Generic

Link:

https://opentip.kaspersky.com/83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327/results?tab=lookup

Score:

Verdict:

Benign

File Type:

Link:

https://malprob.io/report/83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327

Verdict:

inconclusive

YARA:

11 match(es)

Tags:

Archive 7z non extractible (chiffrée, corrompue ou vide) Base64 Block CAB:COMPRESSION:NONE Contains Base64 Block Executable Html Javascript in Html PDB Path PE (Portable Executable) PE File Layout SFX 7z Win 64 Exe x64

Link:

https://app.malva.re/file/9d56be0a712cfcf3dd4338156269acb0

Gathering data

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qpeuwbagk5vxh2dnhqeg6odjq34ksxqklwvzbq7aus7uz6k6omtq._file

Result

Malware family:

n/a

Score:

10/10

Tags:

defense_evasion execution persistence trojan

Link:

https://tria.ge/reports/260913-pd1c7swgrf/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: LoadsDriver

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Enumerates physical storage devices

Executes a command shell one-liner

Drops file in System32 directory

Adds Run key to start application

Indicator Removal: Clear Persistence

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Windows security bypass

Malware family:

CobaltStrike

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/83c94b040657/report/overview.html

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

Threat name:

Malicious File

Score:

0.76

Link:

https://yomi.yoroi.company/submissions/83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327

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:	BLOWFISH_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for Blowfish constants

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

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

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

Rule name:	GoBinTest Create hunting rule

Rule name:	golang Create hunting rule

Rule name:	golang_binary_string Create hunting rule
Description:	Golang strings present

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

Rule name:	grakate_stealer_nov_2021 Create hunting rule

Rule name:	identity_golang Create hunting rule
Author:	Eric Yocam
Description:	find Golang malware

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

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

Rule name:	ProgramLanguage_Golang Create hunting rule
Author:	albertzsigovits
Description:	Application written in Golang programming language

Rule name:	reverse_http Create hunting rule
Author:	CD_R0M_
Description:	Identify strings with http reversed (ptth)

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

Rule name:	Sus_All_Windows_PE_Malware Create hunting rule
Author:	DiegoAnalytics
Description:	Detects Windows PE malware of all types, avoids non-executables like .html

Rule name:	telebot_framework Create hunting rule
Author:	vietdx.mb

Rule name:	test_Malaysia Create hunting rule
Author:	rectifyq
Description:	Detects file containing malaysia string

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/

File information

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

Web download

ValleyRAT

exe 83c94b0406576b73e86d3c086f386986f8a95e0a5dab90c3e0a4bf4cf95e7327

(this sample)

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/85243/

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