Overview

overview

6

Static

static

3

yasb-2.0.0-x64.msi

windows11-21h2-x64

6

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    16/05/2026, 09:36

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    yasb-2.0.0-x64.msi
  • Size 35.8MB
  • Sample260516-llb4ssfv4k
  • SHA256 06e59b96dce9a85ab8e86496a6b9dfdb4a42e16d7e8ddb82b214536324817560
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
persistenceprivilege_escalationransomware

Malware Config

Signatures

  • Badlisted process makes network request 4 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 16 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
    persistenceprivilege_escalation
  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\yasb-2.0.0-x64.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3324
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4116
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious use of AdjustPrivilegeToken
    PID:584

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        e58ca9f.rbs
        • Path C:\Config.Msi\e58ca9f.rbs
        • Size 26KB
        • SHA256 9849ef128030391ab9fa74095289e2652f5aeec08d96482261fae7b66a13de8f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        57C8EDB95DF3F0AD4EE2DC2B8CFD4157
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157
        • Size 4KB
        • SHA256 0300e9ddb527990e8b59d06e9ccf3ec2bd92d3bbd0ef4fba69d6336e4195e82d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
        • Size 1KB
        • SHA256 b05b104d9af3c4ed0a7f799fd520e585023a47d6fe2c58adc98ce99eb410720b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        A1D627669EFC8CD4F21BCF387D97F9B5_F11F6F571EA45E232FBABF0E43AD74DC
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\A1D627669EFC8CD4F21BCF387D97F9B5_F11F6F571EA45E232FBABF0E43AD74DC
        • Size 1KB
        • SHA256 a59e4fafb3da92a49cd63c04a45e072497f93b86b556d7abc4ab2c1bf10d35a9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        57C8EDB95DF3F0AD4EE2DC2B8CFD4157
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157
        • Size 342B
        • SHA256 0320e375b9cad5ce542eccde419235a970f5a2a1b56204ccb665cc431a286185
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164
        • Size 532B
        • SHA256 cb1d3fe9ff17903565275aea72794c399e95c216a468e4d8af40aa178bcfd0c9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        A1D627669EFC8CD4F21BCF387D97F9B5_F11F6F571EA45E232FBABF0E43AD74DC
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\A1D627669EFC8CD4F21BCF387D97F9B5_F11F6F571EA45E232FBABF0E43AD74DC
        • Size 544B
        • SHA256 1fbc50710eb80dd3a89e6eeb4ba8c44b0c32216c31d918d91cfc254d404b86a1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        e58ca9e.msi
        • Path C:\Windows\Installer\e58ca9e.msi
        • Size 35.8MB
        • SHA256 06e59b96dce9a85ab8e86496a6b9dfdb4a42e16d7e8ddb82b214536324817560
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        metadata-2
        • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
        • Size 24.6MB
        • SHA256 aee903590ac03507d8f740c33a47a25b354247851df85ec4dd34e67e09726cc1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        {8b7b450e-e7a1-489a-a9fd-93f0fa478438}_OnDiskSnapshotProp
        • Path \??\Volume{681e74ae-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{8b7b450e-e7a1-489a-a9fd-93f0fa478438}_OnDiskSnapshotProp
        • Size 6KB
        • SHA256 7dcf78f77780591390380cb0ce78e99e4d8de885de817bc93d085f0718afa008
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2416-104-0x0000021EF2DA0000-0x0000021EF3862000-memory.dmp
        Download