- First seen
- Last seen
THREAT SIGNALHigh
Read alongside the verdict
Indicator overview
INDICATOR PROFILEEngine detections are elevated in this report. Review the reported confidence, classification and relationships alongside them.
- SHA256
9b4d51ae4341879ef998f668337f3d00c1aa50e640f0333935cd0cf62bc4d79c- SHA1
fd3f9d1b4d86749880d3a2f2af0c0781db3b9419- MD5
fd93cb74ff3515402f08395cd459e806- Filename
- 9b4d51ae_40908d06-4dd8-4db3-b73e-71eed3101100.exe.bin
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- File size
- 52736
- Compile time
- 2026-08-11T20:27:42Z
- PE platform
- x86 32-bit
- PE sections
- 3
Connected context
Key findings
OBSERVED EVIDENCEAnalysis takeaway
Elevated engine detections. Related indicators in this report: 14. Review the supporting evidence before taking action.
Detection signal
Malicious. Engine detections are elevated at 65%.
Confidence signal
VirusSign reports 100% confidence. Review this alongside engine detections and relationship evidence.
Analysis signals
OBSERVEDEngine detections65%
VirusSign confidence100%
Relationship context14 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.
4shown
70%
critical
peexe
32999912 bytes
drops
Family
zusy
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
Size
32999912
57%
critical
peexe
230124 bytes
drops
Filename
d23b9a3956a6c97ab0235b158bc30cdac18daf3fe54b2d3ff7c754ea933857b6-dropped.bin
Family
crysan
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
58%
high
peexe
144896 bytes
drops
Filename
a562c2cf_temp_protected.exe.bin
Family
msil
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
65%
high
peexe
52736 bytes
drops
Filename
9b4d51ae_40908d06-4dd8-4db3-b73e-71eed3101100.exe.bin
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.
3shown
65%
high
peexe
52736 bytes
drops
Filename
9b4d51ae_40908d06-4dd8-4db3-b73e-71eed3101100.exe.bin
Family
msil
Type
trojan
File type
peexe
MIME
application/vnd.microsoft.portable-executable
0%
ini
26 bytes
drops
Filename
255a65d3_turbotax 2025 installer.exe:zone.identifier.bin
File type
ini
MIME
text/plain
Size
26
SHA1
6693ba299ec1881249d59262276a0d2cb21f8e64
0%
xml
490 bytes
contains
Filename
c0085eb4_invoicemailsending.vshost.exe.manifest.bin
Type
malware
File type
xml
MIME
application/xml
Size
490
Related IPs
Network IPs associated with this indicator.
5shown
5%
high
CN
communicates
CIDR
103.26.76.0/22
Network
103.26.76.0-103.26.79.255
First seen
2026-08-13T01:58:46Z
Last seen
2026-09-30T15:02:35Z
0%
US
communicates
CIDR
23.55.236.0/22
Network
23.32.0.0-23.67.255.255
First seen
2025-01-05T02:26:16Z
Last seen
2026-11-15T05:34:16Z
0%
US
communicates
CIDR
23.55.236.0/22
Network
23.32.0.0-23.67.255.255
First seen
2025-01-03T11:34:58Z
Last seen
2026-11-15T03:35:43Z
0%
US
communicates
CIDR
23.55.236.0/22
Network
23.32.0.0-23.67.255.255
First seen
2025-01-05T22:30:12Z
Last seen
2026-11-15T05:56:33Z
0%
US
communicates
CIDR
23.55.236.0/22
Network
23.32.0.0-23.67.255.255
First seen
2025-01-04T12:03:37Z
Last seen
2026-11-15T06:18:49Z
Related domains
Domains associated with this indicator.
2shown
33%
high
.cn
communicates
Root
cpolar.cn
TLD
cn
Subdomain
6.tcp
First seen
2024-01-04T08:18:46Z
Last seen
2026-11-13T11:47:08Z
0%
.com
communicates
Root
msn.com
TLD
com
Subdomain
assets
First seen
2023-09-29T01:39:51Z
Last seen
2026-11-15T06:19:53Z
Analysis details
Severity: hightrojandotnetexewmi-activitydebug-checkevasionobfuscated
Freshness: Aging · Last seen 76 days ago.
- Detection rate
- 65%
- Threat type
- trojan
- Family
- msil
- Confidence
- 100%
- detection
- 65 · Engine detection rate; color may also reflect VirusSign confidence.
Overview
- SHA256
9b4d51ae4341879ef998f668337f3d00c1aa50e640f0333935cd0cf62bc4d79c- SHA1
fd3f9d1b4d86749880d3a2f2af0c0781db3b9419- MD5
fd93cb74ff3515402f08395cd459e806- Filename
- 9b4d51ae_40908d06-4dd8-4db3-b73e-71eed3101100.exe.bin
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- File size
- 52736
- Compile time
- 2026-08-11T20:27:42Z
- PE platform
- x86 32-bit
- PE sections
- 3
- Import libraries
- 1
- TLSH
T14B3308D8E3E64120C1FF6BB959B313064B30B5578516D61F68C8C9E92B3ABCC46926F3- SSDEEP
768:QZsT20MUGAQDelOMYyAouYxbLb71ZxUA1opb6VFNfWhLOJjpzhf:QSUUGtD2OLYxbLbH1op71OJlhf- Imphash
f34d5f2d4577ed6d9ceec516c1f5a744- First seen
- 2026-08-12T13:04:25Z
- Last seen
- 2026-08-31T03:12:46Z
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: 14. Review the supporting evidence before taking action.
Detection signal
Malicious. Engine detections are elevated at 65%.
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
14 related indicators are shown across 4 relationship group(s). Additional relationship intelligence is available through API and data access.
Observation timeline
13 timestamped observations are arranged from 2009-03-18 to 2026-08-13. 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.
4 relationship group(s) provide pivot and infrastructure context.
Classification context: type trojan, family msil.
Last seen 76 days ago.
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
- 9b4d51ae_40908d06-4dd8-4db3-b73e-71eed3101100.exe.bin
- File type
- peexe
- MIME
- application/vnd.microsoft.portable-executable
- Size
- 52736
- Compile time
- 2026-08-11T20:27:42Z
- PE platform
- x86 32-bit
- Entry point
- 57998
- 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 many API calls related to security
- .NET source code contains potential unpacker
- Allocates memory with a write watch (potentially for evading sandboxes)
- Attempted to spawn a new child process from dynamically allocated (unbacked) memory
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
- T1497 — Allocates memory with a write watch (potentially for evading sandboxes)Tactics: TA0005 · TA0007
- T1055 · T1106 — Attempted to spawn a new child process from dynamically allocated (unbacked) memoryTactics: TA0002 · TA0004 · TA0005
- T1071 — Binary file triggered multiple YARA rulesTactics: TA0011
5 shown
View MBC details · 5 shown
- C0026.001 · C0053.001 — Base64Objectives: OC0004
- F0007.001 — COMSPEC Environment VariableObjectives: OB0006
- CommunicationObjectives: OC0006
- C0045 — Copy FileObjectives: OC0001
- C0042 — Create MutexObjectives: OC0003
5 shown
Network activity
selected detailsSelected observations and details. Additional structured data are available through API and data access.
Network activity3
TCP, UDPports 13498, 53
- 3 outbound connections observed
- 0 domains, 2 IPs, 0 URLs
- Common ports: 13498, 53
- Protocols: TCP, UDP
View details · 3 shown
- IP
- 8.8.8.8
- Port
- 53
- Protocol
- UDP
- IP
- 103.26.77.28
- Port
- 13498
- IP
- 103.26.77.28
- Port
- 13498
- Protocol
- TCP
DNS request activity2
A5 response IPs
- 2 DNS requests observed
- 2 unique queries
- 5 response IPs
- Query types: A
- Response codes: NOERROR
View details · 2 shown
- Query
- 6.tcp.cpolar.cn
- Type
- A
- Answers
- 103.26.77.28
- Response
- NOERROR
- Query
- assets.msn.com
- Type
- A
- Answers
- 23.55.236.138, 23.55.236.136, 23.55.236.140, 23.55.236.137
- Response
- NOERROR
C2 candidates1
DNSports 53
- 1 C2 candidate communications
- 1 domains, 1 IPs
- Common ports: 53
- Protocols: DNS
View details · 1 shown
- IP
- 103.26.77.28
- Domain
- 6.tcp.cpolar.cn
- Port
- 53
- Protocol
- DNS
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: 2026-08-11T20:27:42Z
View details · 1 shown
- Platform
- x86 32-bit
- Entry point
- 57998
- Sections
- 3
- Compile time
- 2026-08-11T20:27:42Z
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
- 49812
- Raw size
- 50176
- Permissions
- rx
- Entropy
- 5.63
- Name
- .rsrc
- Virtual address
- 65536
- Virtual size
- 1246
- Raw size
- 1536
- Permissions
- r
- Entropy
- 3.74
- Name
- .reloc
- Virtual address
- 73728
- 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