MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 cf8b0434d4f4591baf7335931b114cbe715f17a61a38af1e83234484b2e0dc7e. 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
| SHA256 hash: | cf8b0434d4f4591baf7335931b114cbe715f17a61a38af1e83234484b2e0dc7e |
|---|---|
| SHA3-384 hash: | 74fc59a0ea08334684f42b4c5d81cba8b5f64a40cd2163fe9ab49c3ff39ce242d6a1f6dcd24f77207bbdc8e193293c4f |
| SHA1 hash: | 076143a3cba4d03162ec93fcd9af84e7eef3556a |
| MD5 hash: | 92cd36602057f674e287b2b77d505f29 |
| humanhash: | black-mango-aspen-mockingbird |
| File name: | Yiwaiwai_2025.EXE |
| Download: | download sample |
| Signature | ValleyRAT |
| File size: | 68'507'184 bytes |
| First seen: | 2025-11-20 11:28:37 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 039d1617d5f0788dacbd04b35a141ebe (12 x ValleyRAT) |
| ssdeep | 1572864:O9gKeRbSlbPEnoLj3VnfD5W69rNX3mheKVvDvj8:/VSlbPnLPl9xXvKpj8 |
| Threatray | 675 similar samples on MalwareBazaar |
| TLSH | T133E7334CB7065121FC4513B6F8AB376AEFDBCD67014737BA929CF21D197ABE18808990 |
| TrID | 37.3% (.EXE) Win64 Executable (generic) (10522/11/4) 17.8% (.EXE) Win16 NE executable (generic) (5038/12/1) 15.9% (.EXE) Win32 Executable (generic) (4504/4/1) 7.3% (.ICL) Windows Icons Library (generic) (2059/9) 7.2% (.EXE) OS/2 Executable (generic) (2029/13) |
| Magika | pebin |
| Reporter |  SquiblydooBlog |
| Tags: | exe signed ValleyRAT |
Code Signing Certificate
| Organisation: | 湖南蒂角企业管理服务有限公司 |
|---|---|
| Issuer: | Certum Code Signing 2021 CA |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-11-04T11:25:55Z |
| Valid to: | 2026-11-04T11:25:54Z |
| Serial number: | 05e39c93d531d6e0dddcc6774c003f3c |
| Intelligence: | 7 malware samples on MalwareBazaar are signed with this code signing certificate |
| MalwareBazaar Blocklist: | This certificate is on the MalwareBazaar code signing certificate blocklist (CSCB) |
| Cert Central Blocklist: | This certificate is on the Cert Central blocklist |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 358d674ff6d18239b9064562490298f1ec7440d6ac4c46aefff0e8a758c58b9f |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| 20.2.92.110:443 | https://threatfox.abuse.ch/ioc/1647256/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
108
Origin country :
USVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Yiwaiwai_2025.EXE
Verdict:
Malicious activity
Analysis date:
2025-11-20 11:38:50 UTC
Tags:
auto-reg payload silverfox backdoor valley winos rat valleyrat fingerprinting
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
90.2%
Tags:
emotet spawn blic hype
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Moving a recently created file
Searching for synchronization primitives
Launching a process
Creating a window
Launching the default Windows debugger (dwwin.exe)
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer installer installer-heuristic microsoft_visual_cc nsis overlay signed
Verdict:
Suspicious
Labled as:
Trojan.Fsysna.ibyq
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-20T09:07:00Z UTC
Last seen:
2025-11-21T23:42:00Z UTC
Hits:
~10
Detections:
Trojan-Spy.Win32.Stealer.sb Trojan.Win32.Agent.sb Backdoor.Win32.Xkcp.blt Backdoor.Win32.Xkcp.a Backdoor.Xkcp.TCP.ServerRequest Backdoor.Agent.TCP.C&C
Score:
71%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Win32.Backdoor.Generic
Threat name:
Win32.Trojan.ValleyRat
Status:
Malicious
First seen:
2025-11-19 00:38:15 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
13 of 38 (34.21%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
valleyrat
Similar samples:
+ 665 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
7/10
Tags:
discovery installer persistence
Behaviour
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Adds Run key to start application
Checks installed software on the system
Executes dropped EXE
Loads dropped DLL
Unexpected DNS network traffic destination
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Malware family:
ValleyRAT
Verdict:
Malicious
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: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | FreddyBearDropper |
|---|---|
| Author: | Dwarozh Hoshiar |
| Description: | Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip. |
| Rule name: | GenericGh0st |
|---|---|
| Author: | Still |
| Rule name: | Gh0stKCP |
|---|---|
| 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 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | maldoc_find_kernel32_base_method_1 |
|---|---|
| Author: | Didier Stevens (https://DidierStevens.com) |
| Rule name: | maldoc_getEIP_method_1 |
|---|---|
| Author: | Didier Stevens (https://DidierStevens.com) |
| Rule name: | malware_shellcode_hash |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect shellcode api hash value |
| Rule name: | meth_get_eip |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | meth_peb_parsing |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | win64_valley_rat |
|---|---|
| Author: | Reedus0 |
| Description: | Rule for detecting ValleyRAT malware |
| Rule name: | win_valley_rat_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.valley_rat. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
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