MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 899f994ad277c633879683a8502002c1ca6a5e4db02b7eb233e552b502c1ea42. 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: 16
| SHA256 hash: | 899f994ad277c633879683a8502002c1ca6a5e4db02b7eb233e552b502c1ea42 |
|---|---|
| SHA3-384 hash: | d9794f1f883d2efe4bebfa7bf5c0c3d6ecf0227b58e269ba1d16f5bc5997655a4414e5c8de81bb75b4fc5df777d39a03 |
| SHA1 hash: | 8482dae32eec4f47c1a04c532ce7b267c4e6b8d2 |
| MD5 hash: | 99e800599a55a8c337092fe6a4e4ddce |
| humanhash: | muppet-michigan-two-harry |
| File name: | 99E800599A55A8C337092FE6A4E4DDCE.dll |
| Download: | download sample |
| Signature | ValleyRAT |
| File size: | 160'256 bytes |
| First seen: | 2026-09-21 20:30:32 UTC |
| Last seen: | Never |
| File type: |  dll |
| MIME type: | application/x-dosexec |
| imphash | bad9a1ad7b915d5129c131e44aeffe9f (1 x ValleyRAT) |
| ssdeep | 3072:csOf/koleFnZI3OHdakl6/wBiI0VOKvCk7sdUX5pFJ:csOf/fe96g0kl6/wBTk7sy/J |
| TLSH | T151F37D217280C03AD29B213C4966D7735A6FBC718BA5D5CB6BE05E7E5F342C1DA3438A |
| TrID | 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.5% (.EXE) Win64 Executable (generic) (6522/11/2) 8.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 7.2% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| Reporter |  abuse_ch |
| Tags: | dll RAT ValleyRAT |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| 43.229.112.98:6667 | https://threatfox.abuse.ch/ioc/1926824/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
175
Origin country :
NLVendor Threat Intelligence
Malware configuration found for:
ValleyFall
Details
Detection:
WinosStager
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug fingerprint microsoft_visual_cc reconnaissance
Verdict:
Malicious
Labled as:
Trojan.Farfli
Verdict:
Malicious
File Type:
dll x32
First seen:
2026-09-18T10:39:00Z UTC
Last seen:
2026-09-22T20:15:00Z UTC
Hits:
~10
Malware family:
ValleyRAT
Verdict:
Malicious
Result
Threat name:
ValleyRAT
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to inject threads in other processes
Found evasive API chain (may stop execution after checking mutex)
Found malware configuration
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
Uses IRC for communication with a C&C
Yara detected ValleyRAT
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Verdict:
ValleyRat
YARA:
6 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout RAT ValleyRat Win 32 Exe x86
Threat name:
Win32.Backdoor.Farfli
Status:
Malicious
First seen:
2026-09-18 12:12:00 UTC
File Type:
PE (Dll)
Extracted files:
1
AV detection:
20 of 23 (86.96%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
ValleyRAT
Result
Malware family:
valleyrat_s2
Score:
10/10
Tags:
family:valleyrat_s2 backdoor discovery
Behaviour
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Malware Config
C2 Extraction:
43.229.112.98:6667
Unpacked files
SH256 hash:
899f994ad277c633879683a8502002c1ca6a5e4db02b7eb233e552b502c1ea42
MD5 hash:
99e800599a55a8c337092fe6a4e4ddce
SHA1 hash:
8482dae32eec4f47c1a04c532ce7b267c4e6b8d2
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: | 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: | malware_shellcode_hash |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect shellcode api hash value |
| Rule name: | MD5_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for MD5 constants |
| Rule name: | meth_peb_parsing |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | ThreadControl__Context |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE |
|---|---|
| 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: | VECT_Ransomware |
|---|---|
| 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 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Windows_Trojan_Winos_464b8a2e |
|---|---|
| Author: | Elastic Security |
| Rule name: | WinosStager |
|---|---|
| Author: | YungBinary |
| Description: | https://www.esentire.com/blog/winos4-0-online-module-staging-component-used-in-cleversoar-campaign |
| Rule name: | win_winos_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.winos. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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