MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2. 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: 10


Intelligence 10 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2
SHA3-384 hash: b25ea3acf56c5530b6488c566cf3be872f179882677590a1885a4734d5004a6bb3b5375357021647d7346a52ab0ecd01
SHA1 hash: 2cbf10c703e21ed16844b9028fba74d88e4452f4
MD5 hash: 82be9df2f62260b6dc0101e6b468472c
humanhash: uncle-quiet-grey-coffee
File name:2 0 2 6 年 第 三 季 度 违 规 (1).exe
Download: download sample
Signature ValleyRAT
Create hunting rule
File size:4'462'592 bytes
First seen:2026-08-11 13:08:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 87d5828483c777d24f3a1562300eec8b (1 x ValleyRAT)
ssdeep 49152:rWDu7KpHGvEan13Brgy45q7c8XyIbcoSReXwhnJsv6tWKFdu9C4PTvG7FoqOqRsM:T7v1HtbqJsv6tWKFdu9C4iEmKq
TLSH T1BC267D9771FE0268D9F2C13483A36169E5313C0AAB35A1DF21487B686E73AF40D7F259
TrID 50.0% (.EXE) Generic Win/DOS Executable (2002/3)
49.9% (.EXE) DOS Executable (generic) (2000/1)
Magika pebin
dhash icon a4a498d4e4b8d24c (1 x ValleyRAT)
Reporter Ling
Tags:exe SilverFox Trojan/SilverFox.bg[qtsc] ValleyRAT


Avatar
CNGaoLing
Trojan/SilverFox.bg[qtsc]
IOC (Domain wwwvbcsajmj.cn)

Intelligence

File Origin
# of uploads :
1
# of downloads :
131
Origin country :
US US
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
2 0 2 6 年 第 三 季 度 违 规 (1).exe
Verdict:
Malicious activity
Analysis date:
2026-08-11 12:49:15 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/3d963a9b-5bbb-49c9-990b-472768933f15

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/80320/
Detection(s):
SecuriteInfo.com.Variant.Application.Lazy.6939.4287.13038.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Moving of the original file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug base64 crypto evasive fingerprint microsoft_visual_cc packed reconnaissance
Link:
https://www.filescan.io/uploads/6a7b1f073aa6954790675e56/reports/27095d3c-6e23-40b0-8551-d32c158ea6a7/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-08-11T04:01:00Z UTC
Last seen:
2026-08-12T01:41:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/4ca8e08a-7486-4910-a1e7-bd8c73e4a137
Score:
66%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2/
Threat name:
Win64.Malware.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-08-11 09:15:12 UTC
File Type:
PE+ (Exe)
Extracted files:
7
AV detection:
6 of 36 (16.67%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7a5fh4eennqax7afl7iyf6bqrlu67w55c26lokvcsifgvabdg3ra._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/260811-qdz8wazya1/
Behaviour
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Checks installed software on the system
Checks computer location settings
Unpacked files
SH256 hash:
f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2
MD5 hash:
82be9df2f62260b6dc0101e6b468472c
SHA1 hash:
2cbf10c703e21ed16844b9028fba74d88e4452f4
Link:
https://www.unpac.me/results/fb31bd2a-75f4-4b08-a155-830622ddd0d4/
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/f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2

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:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
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:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_detect_tls_callbacks
Create hunting rule
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:SUSP_Websites
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the reference of suspicious sites that might be used to download further malware
Rule name:test_Malaysia
Create hunting rule
Author:rectifyq
Description:Detects file containing malaysia string
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:TH_Generic_MassHunt_Win_Malware_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Windows malware mass-hunt rule - 2025
Reference:https://cyfare.net/
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.

File information

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

Web download

ValleyRAT

Executable exe f83a53f0846b600bfc055fd182f8308ae9efdbbd16bcb72aa2920a6a802336e2

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/80320/

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