Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    01/09/2026, 23:25

General

  • Target
    StepStrum-1.1.0-win-x64.msi
  • Size 6.8MB
  • Sample260901-3epvrattgs
  • SHA256 43cf313d9a24a7e393f2c170ee36f253732edd50a6d3f905bc8f3425f85a0702
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 8 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 9 IoCs
  • Drops file in Windows directory 8 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • 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 22 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.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\StepStrum-1.1.0-win-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:1580
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • 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:3160
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3784
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:3280

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e58f0f4.rbs

          • Path C:\Config.Msi\e58f0f4.rbs
          • Size 8KB
          • SHA256 db3e33916c629498c9e0321f85581d483381ae0025f2b5bcba0cc296920740b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          54C62B182F5BF07FA8427C07B0A3AAF8_4DBBCB40FA282C06F1543D887F4F4DCC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\54C62B182F5BF07FA8427C07B0A3AAF8_4DBBCB40FA282C06F1543D887F4F4DCC
          • Size 719B
          • SHA256 c7fa88dfcb73126fd77c31bef314fdc3032bc4046666561db74ea50fab4e564f
          • MD5 SHA1 SHA512 TLSH

          D682FDDA10064185EC8111DC39DBA8EC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\D682FDDA10064185EC8111DC39DBA8EC
          • Size 174KB
          • SHA256 f0f05b53f09f4ca2e328e2b5a13e416099f0d841d281741de27e1e628430dd22
          • MD5 SHA1 SHA512 SSDEEP TLSH

          54C62B182F5BF07FA8427C07B0A3AAF8_4DBBCB40FA282C06F1543D887F4F4DCC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\54C62B182F5BF07FA8427C07B0A3AAF8_4DBBCB40FA282C06F1543D887F4F4DCC
          • Size 446B
          • SHA256 b7c445cbef559a6e2077e499efe75bbad798f520ca8735ae9fbaff8c70c07ef3
          • MD5 SHA1 SHA512 TLSH

          D682FDDA10064185EC8111DC39DBA8EC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\D682FDDA10064185EC8111DC39DBA8EC
          • Size 308B
          • SHA256 5d58265fc2587628b58da0fb577529981cef28245f9f11634f219474d70b33aa
          • MD5 SHA1 SHA512 TLSH

          e58f0f3.msi

          • Path C:\Windows\Installer\e58f0f3.msi
          • Size 6.8MB
          • SHA256 43cf313d9a24a7e393f2c170ee36f253732edd50a6d3f905bc8f3425f85a0702
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.1MB
          • SHA256 ff1859d82109f3bb69c53054dcfb79975a48bf3ace71aeff01594efc05ffcfdc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {48e34164-a968-4582-9cc4-d8b06e68df27}_OnDiskSnapshotProp

          • Path \??\Volume{63ef4f52-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{48e34164-a968-4582-9cc4-d8b06e68df27}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 566f5f2f2c53306bfd61a136e65dcc80c7f1e09c4db8bc7c91634793fbc6cff5
          • MD5 SHA1 SHA512 SSDEEP TLSH