The cbservice exe (Chaos Cosmos Browser Service) ChaosGroup File Malware Analysis
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The cbservice.exe (Chaos Cosmos Browser Service) File Analysis

Updated 13 hours ago
Checked by Malware Check
cbservice.exe

Technical Analysis

File Name cbservice.exe
File Type
PE32+ executable (GUI) x86-64, for MS Windows
Scanner Version 1.0.231.174
Database Version 2025-12-27 12:00:34 UTC
✓

Clean File

No threats detected by our scanner

0%
Detection Rate
84,084,584
File Size (bytes)
2025-12-27
Analysis Date

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File Identification

Hash Type Value Action
MD5
92bb058ab571b3de523bff81c2dea02b
SHA1
1c5871bff5addaed595d1b1161a347701854af36
SHA256
ef954056e6a109267540335b55db4e9a5f191f0692290aa53d8df1f87452de1e
SHA512
30aa86a88ff2585ac43d17e13363d4c140d9e0eecf678c9cb462f9ff55b17be995d1cd88ab501b9e7603d3e2bf1caadce2bddf7161ddb9f2c946d0be881f6c03
ImpHash
a85b79fb70a8bfe24cd78fcfd8ec90ba

PE Analysis

Basic Information

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Icon
Hash: 443ee2a00f2735e9f534a6ad93e01aff
Fuzzy: cf45761ca17af91e38d75ca95ff0c3d6
dHash: 9671d8c4c4d819a6
Image Base 0x00400000
Entry Point 0x004014b0
Compilation Time 1970-01-01 00:00:00
Checksum 0x0503b771 (Actual: 0x0503b771)
OS Version 6.1
PEiD Signatures PE32+ executable (GUI) x86-64, for MS Windows
Digital Signature Chain verification from CN=CHAOS SOFTWARE EOOD, O=CHAOS SOFTWARE EOOD, L=Sofia, C=BG, serialNumber=131375768, businessCategory=Private Organization, jurisdictionOfIncorporationCountryName=BG (serial:14452299047668874521635308459276319018, sha1:4fec0251159ff83a364d299cd53a4b4c30f6d8a2) failed: Unable to build a validation path for the certificate "Common Name: CHAOS SOFTWARE EOOD, Organization: CHAOS SOFTWARE EOOD, Locality: Sofia, Country: BG, Serial Number: 131375768, Business Category: Private Organization, Incorporation Country: BG" - no issuer matching "Common Name: DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1; Organization: DigiCert, Inc.; Country: US" was found
Imports 9 libraries
ADVAPI32, DHCPCSVC, IPHLPAPI, KERNEL32, msvcrt, ole32, USER32, WINHTTP, WS2_32
Exports 10 functions
Resources 7 Resources
Sections 21 Sections

Version Information

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CompanyName ChaosGroup
FileDescription Chaos Cosmos Browser Service
FileVersion 2025.09.11-571032
InternalName cbservice
LegalCopyright Copyright (C) 2025
OriginalFilename cbservice
ProductName Chaos Cosmos Browser
ProductVersion 2025.09.11-571032
Translation 0x0409 0x04b0

PE Sections

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Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.text 0x00001000 13,353,848 bytes 13,357,056 bytes 6.25 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_4096BYTES FDD1939E205B10E60707888CEFCCCFBC
.data 0x00cbe000 588,192 bytes 588,288 bytes 4.87 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_32BYTES E06E0F9C6B3193104E1FB5E63053858F
.rdata 0x00d4e000 36,777,664 bytes 36,777,984 bytes 7.54 (Packed/Encrypted) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_64BYTES 38EBD8A8EB237669351CD3B165E020D1
.pdata 0x03061000 398,496 bytes 398,848 bytes 6.21 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_4BYTES 66053B576A39C1EC53E7CCAA2F2F1099
.xdata 0x030c3000 89,992 bytes 90,112 bytes 4.32 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_8BYTES 75419EF78843C9F91BE402B68D58BAFF
.bss 0x030d9000 460,316 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_32BYTES D41D8CD98F00B204E9800998ECF8427E
.edata 0x0314a000 339 bytes 512 bytes 3.92 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_4BYTES 1E88EDA6ACF8DC643454D42C7374C756
.idata 0x0314b000 9,900 bytes 10,240 bytes 4.85 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_4BYTES 672FD9B3856703B0CA094933D3984853
.CRT 0x0314e000 104 bytes 512 bytes 0.33 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_8BYTES 4CD9570C98F0D59ED7557BEED5A9AF59
.tls 0x0314f000 16 bytes 512 bytes 0.00 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_8BYTES BF619EAC0CDF3F68D496EA9344137E8B
.rsrc 0x03150000 60,840 bytes 60,928 bytes 7.20 (Compressed) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_ALIGN_4BYTES 43D0D3D93699D5495EDE5ECF35159ACA
.reloc 0x0315f000 249,416 bytes 249,856 bytes 5.45 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_4BYTES 4E133531BF26FE1C2EC680B848E91CDF
/4 0x0319c000 128 bytes 512 bytes 0.54 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_16BYTES 05B449183CB5676F545343D2F2171288
/19 0x0319d000 9,206,773 bytes 9,206,784 bytes 6.10 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES D35F85D89A62E3508C5B3CCFF33B76A9
/31 0x03a65000 2,081 bytes 2,560 bytes 4.33 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES 7D39D32453740659DF9EB4BBBBDC7ADD
/45 0x03a66000 3,455,591 bytes 3,456,000 bytes 5.96 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES 61B69E2B4DBCB80030CB6E57DD1FF75C
/57 0x03db2000 1,479,688 bytes 1,480,192 bytes 3.82 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_8BYTES 9BCC25FA6AAB63611E4B1B00F223F36F
/70 0x03f1c000 296 bytes 512 bytes 3.92 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES EB85936E899ACB9529B6E17F82FFE9A4
/81 0x03f1d000 11,853,891 bytes 11,854,336 bytes 2.93 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES 07C5DD1C3663DFF8E611C728F3C8A291
/92 0x04a6c000 2,993,504 bytes 2,993,664 bytes 2.27 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES 9F1C4BED843B0DE2D5EF428B3BA1CACB
/106 0x04d47000 48 bytes 512 bytes 0.86 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ|IMAGE_SCN_ALIGN_1BYTES 40CCA7C46FC713B4F088E5D440CA7931
Entropy Analysis Alert

1 section(s) with high entropy (≥7.5) detected - possible packing/encryption

1 section(s) with elevated entropy (≥6.5) - possible compression

Resource Analysis

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Total Resources: 7 (60,382 bytes)
Resource Type Count Total Size Percentage
RT_ICON 5 59,526 bytes
98.6%
RT_GROUP_ICON 1 76 bytes
0.1%
RT_VERSION 1 780 bytes
1.3%

Certificate Chain Analysis

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Certificate Information
Product Chaos Cosmos Browser
Description Chaos Cosmos Browser Service
File Version 2025.09.11-571032
Original Name cbservice
Signing Date 11:22 AM 09/11/2025 (107 days ago)
Verification Status Signed
Signers CHAOS SOFTWARE EOOD; DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1; DigiCert Trusted Root G4; DigiCert
Counter Signers DigiCert SHA256 RSA4096 Timestamp Responder 2025 1; DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1; DigiCert Trusted Root G4; DigiCert
Internal Name cbservice
Copyright Copyright (C) 2025
Certificate Chain Summary
CHAOS SOFTWARE EOOD #1 Primary
Validity Period: 2024-05-07 00:00:00 → 2027-06-03 23:59:59
Signature Algorithm: sha256RSA
Serial Number: 0A DF 69 5B 59 2A 47 34 1E AF C3 36 AA BB 39 2A
DigiCert Trusted Root G4 #2 Chain
Validity Period: 2022-08-01 00:00:00 → 2031-11-09 23:59:59
Signature Algorithm: sha384RSA
Serial Number: 0E 9B 18 8E F9 D0 2D E7 EF DB 50 E2 08 40 18 5A
DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1 #3 Chain
Validity Period: 2025-05-07 00:00:00 → 2038-01-14 23:59:59
Signature Algorithm: sha256RSA
Serial Number: 0D C7 AC 57 05 FF 21 99 2E 40 43 22 0C 3A 49 86
DigiCert SHA256 RSA4096 Timestamp Responder 2025 1 #4 Chain
Validity Period: 2025-06-04 00:00:00 → 2036-09-03 23:59:59
Signature Algorithm: sha256RSA
Serial Number: 0A 80 EF 18 4B 8D F1 05 82 D1 C4 76 A7 95 74 68

✓ This file has been digitally signed and the certificate chain has been verified

  • The signature ensures file integrity and authenticity from the publisher
  • Timestamping proves when the signature was applied
Certificate Verification Status

Chain verification from CN=CHAOS SOFTWARE EOOD, O=CHAOS SOFTWARE EOOD, L=Sofia, C=BG, serialNumber=131375768, businessCategory=Private Organization, jurisdictionOfIncorporationCountryName=BG (serial:14452299047668874521635308459276319018, sha1:4fec0251159ff83a364d299cd53a4b4c30f6d8a2) failed: Unable to build a validation path for the certificate "Common Name: CHAOS SOFTWARE EOOD, Organization: CHAOS SOFTWARE EOOD, Locality: Sofia, Country: BG, Serial Number: 131375768, Business Category: Private Organization, Incorporation Country: BG" - no issuer matching "Common Name: DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1; Organization: DigiCert, Inc.; Country: US" was found

Recommendation: Verify the file source and ensure it comes from a trusted publisher.

Remember: This is Result of Online Virus Scanner

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Keep Your System Protected

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  1. Regular Scans: Run weekly system scans to detect new threats before they can cause damage.
  2. Keep Software Updated: Ensure your operating system and all applications have the latest security patches.
  3. Safe Browsing: Avoid suspicious websites and never download software from untrusted sources.
  4. Email Security: Be cautious with email attachments and links, even from known contacts.
Proactive Protection
This file passed all security checks, but stay vigilant. New malware variants appear daily that can evade detection. Always verify files come from official sources and check digital signatures when available.

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