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File name:

BrotliSharpLib.bin

Full analysis: https://app.any.run/tasks/c4ce0c5f-d305-44b6-b3ff-bea6c2eafbf5
Verdict: Malicious activity
Analysis date: August 08, 2020, 18:59:11
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
MIME: application/x-dosexec
File info: PE32 executable (DLL) (console) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

7BA33B5FBFD4662D72B50BB09BDE7ED7

SHA1:

D26998C60811161EC2130D8566029BF0648FA990

SHA256:

EC1E6529A83DB97684474C1CB4E0A989EB7BCFEA98591AFC2C026B08F48600A0

SSDEEP:

24576:x8Op+ZPe0AI/Ip+Tof6nHuFPZ7sYgdlTa/7oW/dGy/KmlQ82VHP3JYgprP5//pAV:x1p+ZPe0AI/Ip+Tof6nHuFPZ7sYgdlTd

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.
  • MALICIOUS

    • Loads dropped or rewritten executable

      • svchost.exe (PID: 876)
      • explorer.exe (PID: 1704)
  • SUSPICIOUS

    • Uses RUNDLL32.EXE to load library

      • explorer.exe (PID: 1704)
  • INFO

    • Loads main object executable

      • rundll32.exe (PID: 2792)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win64 Executable (generic) (49.4)
.scr | Windows screen saver (23.4)
.dll | Win32 Dynamic Link Library (generic) (11.7)
.exe | Win32 Executable (generic) (8)
.exe | Generic Win/DOS Executable (3.5)

EXIF

EXE

AssemblyVersion: 0.3.2.0
ProductVersion: 0.3.3
ProductName: BrotliSharpLib
OriginalFileName: BrotliSharpLib.dll
LegalCopyright: Copyright (c) 2017-2019 master131
InternalName: BrotliSharpLib.dll
FileVersion: 0.3.3
FileDescription: BrotliSharpLib
CompanyName: master131
Comments: Full C# port of Brotli compression library.
CharacterSet: Unicode
LanguageCode: Neutral
FileSubtype: -
ObjectFileType: Dynamic link library
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 0.3.3.0
FileVersionNumber: 0.3.3.0
Subsystem: Windows command line
SubsystemVersion: 6
ImageVersion: -
OSVersion: 4
EntryPoint: 0x100526
UninitializedDataSize: -
InitializedDataSize: 1536
CodeSize: 1321984
LinkerVersion: 48
PEType: PE32
TimeStamp: 2095:04:11 22:57:15+02:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_CUI
Compilation Date: 06-Mar-1959 14:28:59
Debug artifacts:
  • I:\Git Projects\BrotliSharpLib\BrotliSharpLib\obj\Release\net451\BrotliSharpLib.pdb
Comments: Full C# port of Brotli compression library.
CompanyName: master131
FileDescription: BrotliSharpLib
FileVersion: 0.3.3
InternalName: BrotliSharpLib.dll
LegalCopyright: Copyright (c) 2017-2019 master131
OriginalFilename: BrotliSharpLib.dll
ProductName: BrotliSharpLib
ProductVersion: 0.3.3
Assembly Version: 0.3.2.0

DOS Header

Magic number: MZ
Bytes on last page of file: 0x0090
Pages in file: 0x0003
Relocations: 0x0000
Size of header: 0x0004
Min extra paragraphs: 0x0000
Max extra paragraphs: 0xFFFF
Initial SS value: 0x0000
Initial SP value: 0x00B8
Checksum: 0x0000
Initial IP value: 0x0000
Initial CS value: 0x0000
Overlay number: 0x0000
OEM identifier: 0x0000
OEM information: 0x0000
Address of NE header: 0x00000080

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 3
Time date stamp: 06-Mar-1959 14:28:59
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_DLL
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LARGE_ADDRESS_AWARE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00002000
0x00142A74
0x00142C00
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
5.22613
.rsrc
0x00146000
0x000003F8
0x00000400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
3.25419
.reloc
0x00148000
0x0000000C
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
0.0815394

Resources

Title
Entropy
Size
Codepage
Language
Type
1
3.38517
924
UNKNOWN
UNKNOWN
RT_VERSION

Imports

mscoree.dll
No data.
screenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
37
Monitored processes
3
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start rundll32.exe no specs svchost.exe explorer.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
2792"C:\Windows\System32\rundll32.exe" "C:\Users\admin\Desktop\BrotliSharpLib.bin.exe", DllMainC:\Windows\System32\rundll32.exeexplorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
876C:\Windows\system32\svchost.exe -k netsvcsC:\Windows\System32\svchost.exe
services.exe
User:
SYSTEM
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
Host Process for Windows Services
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
1704C:\Windows\Explorer.EXEC:\Windows\explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Explorer
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Total events
865
Read events
860
Write events
5
Delete events
0

Modification events

(PID) Process:(876) svchost.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS\Diag\WMI Writer
Operation:writeName:_ObjectId_
Value:
EA00000000000000
(PID) Process:(876) svchost.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS\Diag\WMI Writer
Operation:writeName:_ObjectLru_
Value:
F803000000000000
(PID) Process:(876) svchost.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS\Diag\WMI Writer
Operation:writeName:_FileId_
Value:
8441000000001400
(PID) Process:(876) svchost.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS\Diag\WMI Writer
Operation:writeName:_Usn_
Value:
F862F80400000000
(PID) Process:(876) svchost.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\VSS\Diag\WMI Writer
Operation:writeName:_UsnJournalId_
Value:
CAF752A8FD3DD301
Executable files
0
Suspicious files
0
Text files
0
Unknown types
1

Dropped files

PID
Process
Filename
Type
876svchost.exeC:\Windows\appcompat\programs\RecentFileCache.bcftxt
MD5:80E2D81AB1E2627402AE0E47844D88E3
SHA256:12991737C711E790770A5EEA7F2CA8B71F8DDB4461524C01377EF253BD93EFCC
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
0
DNS requests
0
Threats
0

HTTP requests

No HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

No data

DNS requests

No data

Threats

No threats detected
No debug info