- First seen
- Last seen
THREAT SIGNALMedium-high
Read alongside the verdict
Indicator overview
INDICATOR PROFILEEngine detections are elevated in this report. Review the reported confidence, classification and relationships alongside them.
- SHA256
ef3983ea1b702ecb60c5b61e5a6e42fbe2be947f30f81ba293b28e3ec75a50bc- SHA1
2480bdec6d29eab1a5fab5c658b922d1f333977f- MD5
3c9e499362f7784fd53a073e0eb0e248- Filename
- Ky9Stub.exe
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- File size
- 68364
- Compile time
- 2026-10-21T15:12:54Z
- PE platform
- x86 32-bit
- PE sections
- 3
Connected context
Key findings
OBSERVED EVIDENCEAnalysis takeaway
Elevated engine detections. Related indicators in this report: 17. Review the supporting evidence before taking action.
Detection signal
Malicious. Engine detections are elevated at 43%.
Confidence signal
VirusSign reports 100% confidence. Review this alongside engine detections and relationship evidence.
Analysis signals
OBSERVEDEngine detections43%
VirusSign confidence100%
Relationship context17 visible
Threat classificationmsil
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Graph filters
Saved investigations
Compare when indicators were first seen, last seen and observed. Switch to Lifecycle to connect events for the same IOC.
Review approximate infrastructure locations and geographic concentration.
Commonalities
RELATIONSHIP CONSTELLATION
No observations in this view
Available evidence appears in the other investigation lenses.
SELECT A NODE TO EXPLORE
FILEDOMAINIPURL
Visible connections
Related intelligence
Pivot across connected files and infrastructure with analysis signals and supporting context.
Parent files
Files that may have delivered, loaded, or executed this indicator.
1shown
43%
high
peexe
68364 bytes
drops
Filename
Ky9Stub.exe
Family
msil
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
Dropped / child files
Files dropped, bundled, or created by the queried file.
5shown
61%
high
peexe
35328 bytes
drops
Filename
mb7nc.exe
Family
msilheracles
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
43%
high
peexe
68364 bytes
drops
Filename
Ky9Stub.exe
Family
msil
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
0%
wav
240044 bytes
drops
Filename
6e9deb73-270a-4f3b-9aa1-21c1538a52ac.wav
File type
wav
MIME
audio/wav
Size
240044
SHA1
fdbd6290804f8625f32758633c6a7637221f1972
0%
csv
859 bytes
drops
Filename
MelonityFree.exe.log
File type
csv
MIME
text/plain
Size
859
SHA1
103116cc0a106be1c6123551babcad59737a4d3b
0%
powershell
60 bytes
drops
Filename
__PSScriptPolicyTest_iugzvutm.mi5.ps1
File type
powershell
MIME
text/plain
Size
60
SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d
Related IPs
Network IPs associated with this indicator.
5shown
16%
medium
communicates
CIDR
31.57.97.0/24
Network
31.57.97.0-31.57.97.255
Country
The Netherlands
First seen
2026-06-27T08:19:29Z
Last seen
2026-11-12T19:46:04Z
0%
GB
communicates
CIDR
51.136.0.0/15
Network
51.137.0.0-51.137.255.255
First seen
2023-09-30T15:07:07Z
Last seen
2026-11-12T21:15:52Z
Related domains
Domains associated with this indicator.
5shown
0%
.in-addr.arpa
communicates
Root
192.in-addr.arpa
TLD
in-addr.arpa
Subdomain
3.125.168
First seen
2023-09-29T20:48:40Z
Last seen
2026-11-12T21:16:32Z
0%
.in-addr.arpa
communicates
Root
192.in-addr.arpa
TLD
in-addr.arpa
Subdomain
4.125.168
First seen
2023-10-01T03:29:19Z
Last seen
2026-11-12T21:21:12Z
0%
.in-addr.arpa
communicates
Root
192.in-addr.arpa
TLD
in-addr.arpa
Subdomain
2.125.168
First seen
2023-10-01T14:04:07Z
Last seen
2026-11-12T21:13:54Z
0%
.moe
communicates
Root
catbox.moe
TLD
moe
First seen
2023-09-29T01:54:07Z
Last seen
2026-11-12T19:18:43Z
10%
high
.moe
communicates
Root
catbox.moe
TLD
moe
Subdomain
files
First seen
2023-09-29T13:15:07Z
Last seen
2026-11-12T21:31:05Z
Related URLs
URLs associated with this indicator.
1shown
17%
medium
communicates
TLD
moe
HTTP status
503
Content length
15
Content SHA256
327972b8bcc43d2ebdb6ad8c96d5d5312f0f73328ca8211195d757ef5f0e5116
First seen
2025-04-23T20:19:13Z
Analysis details
Severity: hightrojanfile-overlaypolymorphicexedotnetpersistencedebug-checkexecexecutionobfuscated
Freshness: Fresh · Last seen today.
- Detection rate
- 43%
- Threat type
- trojan
- Family
- msil
- Confidence
- 100%
- detection
- 43 · Engine detection rate; color may also reflect VirusSign confidence.
Overview
- SHA256
ef3983ea1b702ecb60c5b61e5a6e42fbe2be947f30f81ba293b28e3ec75a50bc- SHA1
2480bdec6d29eab1a5fab5c658b922d1f333977f- MD5
3c9e499362f7784fd53a073e0eb0e248- Filename
- Ky9Stub.exe
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- File size
- 68364
- Compile time
- 2026-10-21T15:12:54Z
- PE platform
- x86 32-bit
- PE sections
- 3
- Import libraries
- 1
- TLSH
T10B63F123BFE98FF5E4E9CFF979E343109A3496505922CD2D5E30286C19009FE42667B2- SSDEEP
1536:KE4AlWzLjyDRs+vzaxJy4Ob+zcRU2wrviT55X:KvAlILjyDve/5Ob+zYurg55X- Imphash
f34d5f2d4577ed6d9ceec516c1f5a744- First seen
- 2026-10-24T15:18:04Z
- Last seen
- 2026-11-12T19:18:42Z
- Filename variants
- 5 reported
Key findings
A focused interpretation of the evidence, relationships and observation history that matter most.
Analysis takeaway
Elevated engine detections. Related indicators in this report: 17. Review the supporting evidence before taking action.
Detection signal
Malicious. Engine detections are elevated at 43%.
Confidence signal
VirusSign reports 100% confidence. Review this alongside engine detections and relationship evidence.
Threat context
Classification includes type trojan and family msil.
Relationship context
17 related indicators are shown across 5 relationship group(s). Additional relationship intelligence is available through API and data access.
Observation timeline
16 timestamped observations are arranged from 2019-08-20 to 2026-10-21. These are observation or metadata times, not execution order.
Why this verdict
Review the reported detections, analysis confidence and supporting context.
Engine detections are elevated in this report. Review the reported confidence, classification and relationships alongside them.
Reported engine detection rate, not the probability that this indicator is malicious.
VirusSign analysis confidence; separate from detection rate and actor-association confidence.
5 relationship group(s) provide pivot and infrastructure context.
Classification context: type trojan, family msil.
Last seen today.
Signals reflect the intelligence returned in this report. Missing values mean not reported, not zero. Related indicators are investigation leads, not proof of shared malicious activity.
File profile
summarySelected file intelligence summary.
- Filename
- Ky9Stub.exe
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- Size
- 68364
- Compile time
- 2026-10-21T15:12:54Z
- PE platform
- x86 32-bit
- Entry point
- 15342
- Sections
- 3
Observed behavior
selected detailsSelected behavioral observations and reported framework mappings.
View details · 5 shown
- .NET source code contains calls to encryption/decryption functions
- .NET source code contains potential unpacker
- .NET source code references suspicious native API functions
- A DLL was loaded from a suspicious directory
- Allocates memory with a write watch (potentially for evading sandboxes)
5 shown
View MITRE ATT&CK details · 5 shown
- T1140 · T1560 — .NET source code contains calls to encryption/decryption functionsTactics: TA0005 · TA0009
- T1027.002 — .NET source code contains potential unpackerTactics: TA0005
- T1106 — .NET source code references suspicious native API functionsTactics: TA0002
- T1574 — A DLL was loaded from a suspicious directoryTactics: TA0002 · TA0005
- T1497 — Allocates memory with a write watch (potentially for evading sandboxes)Tactics: TA0005 · TA0007
5 shown
View MBC details · 5 shown
- C0007 — Allocate MemoryObjectives: OC0002
- Anti-Behavioral AnalysisObjectives: OB0001
- C0026.001 — Base64Objectives: OC0004
- B0001.002 — CheckRemoteDebuggerPresentObjectives: OB0001
- CommunicationObjectives: OC0006
5 shown
Network activity
selected detailsSelected observations and details. Additional structured data are available through API and data access.
Network activity5+
TCP, HTTP, UDPports 135, 445, 49667
- 5+ outbound connections observed
- 1 domains, 5+ IPs, 1 URLs
- Common ports: 135, 445, 49667, 49951, 49952
- Protocols: TCP, HTTP, UDP
View details · 5 shown
- Domain
- files.catbox.moe
- URL
- https://files.catbox.moe/ab4icn.rar
- Protocol
- HTTP
- IP
- 31.57.97.166
- Port
- 5559
- Protocol
- TCP
- IP
- 108.181.20.35
- Port
- 443
- Protocol
- TCP
- IP
- 8.8.8.8
- Port
- 53
- Protocol
- UDP
- IP
- 192.168.122.111
- Port
- 49154
- Protocol
- TCP
5 shown
DNS request activity5
A2 response IPs
- 5 DNS requests observed
- 5 unique queries
- 2 response IPs
- Query types: A
- Response codes: NOERROR
View details · 5 shown
- Query
- files.catbox.moe
- Type
- A
- Answers
- 108.181.20.35
- Response
- NOERROR
- Query
- time.windows.com
- Type
- A
- Answers
- 51.137.137.111
- Response
- NOERROR
- Query
- 4.125.168.192.in-addr.arpa
- Query
- 3.125.168.192.in-addr.arpa
- Query
- 2.125.168.192.in-addr.arpa
C2 candidates2
HTTP, TCPports 5559
- 2 C2 candidate communications
- 1 domains, 1 IPs
- Common ports: 5559
- Protocols: HTTP, TCP
View details · 2 shown
- Domain
- files.catbox.moe
- Protocol
- HTTP
- IP
- 31.57.97.166
- Port
- 5559
- Protocol
- TCP
File structure
selected detailsSelected observations and details. Additional structured data are available through API and data access.
PE header1
platform x86 32-bit3 sections
- Platform: x86 32-bit
- Sections: 3
- Entry point: present
- Compile time: 2026-10-21T15:12:54Z
View details · 1 shown
- Platform
- x86 32-bit
- Entry point
- 15342
- Sections
- 3
- Compile time
- 2026-10-21T15:12:54Z
PE sections3
3 sections
- 3 PE sections
- Common permissions: r, rx
- 3 unique section names
View details · 3 shown
- Name
- .text
- Virtual address
- 8192
- Virtual size
- 7156
- Raw size
- 7168
- Permissions
- rx
- Entropy
- 5.61
- Name
- .rsrc
- Virtual address
- 16384
- Virtual size
- 1240
- Raw size
- 1536
- Permissions
- r
- Entropy
- 3.72
- Name
- .reloc
- Virtual address
- 24576
- Virtual size
- 12
- Raw size
- 512
- Permissions
- r
- Entropy
- 0.08
Imports1
1 DLL groups
- 1 import DLL groups
- 1 imported functions summarized
View details · 1 shown
- Library
- mscoree.dll
- Functions
- _CorExeMain
Resources2
2 resources
- 2 resources
- Resource types: RT_MANIFEST, RT_VERSION
View details · 2 shown
- Type
- RT_VERSION
- Language
- NEUTRAL
- Type
- RT_MANIFEST
- Language
- NEUTRAL