MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76. 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: 13


Intelligence 13 IOCs YARA 23 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76
SHA3-384 hash: a39e87f0e22f0978e9999960e2ae32c97e086793dc520b9c8516b90a0d760a46d1c027ac6d8247f3bb5b3bd8fc7cf067
SHA1 hash: 52b77a3df9970d9bc1fe6d191835bb5542948b88
MD5 hash: 370ea5d9350581fa4ca4b72cb43039ac
humanhash: illinois-black-neptune-echo
File name:inst_downloader.exe
Download: download sample
Signature ValleyRAT
Create hunting rule
File size:230'568 bytes
First seen:2026-06-15 12:01:57 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'070 x AgentTesla, 20'023 x Formbook, 12'352 x SnakeKeylogger)
ssdeep 6144:SbdpmETiK/kvjE49mLq4DuLGArEdBTogIcV:aTjEE4oLqGvBB
TLSH T16234F17D70DD0C12F90B86305DA602AD96F15BAA16F4F3E336CDFA3B1E8420DAD11982
TrID 70.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.2% (.EXE) Win64 Executable (generic) (6522/11/2)
4.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter Ling
Tags:exe SilverFox ValleyRAT


Avatar
CNGaoLing
SilverFox
IOC (Domain a.qqmusic1.com)

Intelligence

File Origin
# of uploads :
1
# of downloads :
154
Origin country :
US US
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
inst_downloader.exe
Verdict:
Malicious activity
Analysis date:
2026-06-15 11:53:32 UTC
Tags:
evasion
Link:
https://app.any.run/tasks/b25e15c8-cdba-4af6-a89b-2f90328dd67a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
WinosStager
Create hunting rule
Link:
https://www.capesandbox.com/analysis/70784/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a2fe7eea15110463ee60438
Tags:
emotet cobalt
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Creating a window
Connection attempt to an infection source
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Unauthorized injection to a recently created process
Query of malicious DNS domain
Sending a TCP request to an infection source
Deleting of the original file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
invalid-signature obfuscated overlay packed reconnaissance signed
Link:
https://www.filescan.io/uploads/6a2fe9e11f652d686580a8d0/reports/b7031324-aeee-4709-a26d-e9914bf2600a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76
Verdict:
Malicious
File Type:
exe x32
Detections:
Trojan.MSIL.Agent.sb
Link:
https://opentip.kaspersky.com/58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76/results?tab=lookup
Malware family:
ValleyRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7dce9020-6e4a-479b-bd6c-02576ebae3d2
Score:
78%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76/
Verdict:
Malicious
Threat:
Family.VALLEYRAT_S2
Link:
https://tip.neiki.dev/file/58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ld6mtw6kacv3kqa6bygchx7dkxnqc7wlz73kqzwoxaokirfinv3a._file
Result
Malware family:
valleyrat_s2
Create hunting rule
Score:
  10/10
Tags:
family:valleyrat_s2 backdoor defense_evasion
Link:
https://tria.ge/reports/260615-n7s1jsay9v/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Deletes itself
Executes dropped EXE
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Family: ValleyRat
Malware Config
C2 Extraction:
a.qqmusic1.com:443
a.qqmusic1.com:80
Unpacked files
SH256 hash:
58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76
MD5 hash:
370ea5d9350581fa4ca4b72cb43039ac
SHA1 hash:
52b77a3df9970d9bc1fe6d191835bb5542948b88
Link:
https://www.unpac.me/results/9c96aac8-471a-4196-87b0-cfd966516b9d/
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
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:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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:WinosStager
Create hunting rule
Author:YungBinary
Description:https://www.esentire.com/blog/winos4-0-online-module-staging-component-used-in-cleversoar-campaign

File information

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

Web download

ValleyRAT

Executable exe 58fcc9dbca00abb5401e0e0c23dfe355db017ecbcff6a866ceb81ca444a86d76

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/70784/

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