Analysis

  • user interaction
    yes
  • max time kernel
    105s
  • max time network
    108s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/08/2026, 09:45

General

  • Target
    SteamBoosterSetup(1).exe
  • Size 4.1MB
  • Sample260801-lre3msgq9t
  • SHA256 a6686c497e7312610b52a40e5f20365bbfde405dcfd92132bae87715366b178b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 7 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 23 IoCs

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

  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\SteamBoosterSetup(1).exe
    "C:\Users\Admin\AppData\Local\Temp\SteamBoosterSetup(1).exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
      "C:\Users\Admin\AppData\Local\Temp\SteamBoosterSetup(1).exe" --parent-pid=1988 --bootstrap-handoff
      2⤵
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2784
  • \??\c:\users\admin\appdata\local\steambooster\steambooster.exe
    "c:\users\admin\appdata\local\steambooster\steambooster.exe" --autostart
    1⤵
    • Executes dropped EXE
    PID:428
  • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
    "C:\Users\Admin\AppData\Local\steambooster\steambooster.exe"
    1⤵
    • Executes dropped EXE
    PID:4740
  • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
    "C:\Users\Admin\AppData\Local\steambooster\steambooster.exe"
    1⤵
    • Executes dropped EXE
    PID:2900
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
    1⤵
      PID:1132
    • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
      "C:\Users\Admin\AppData\Local\steambooster\steambooster.exe"
      1⤵
      • Executes dropped EXE
      PID:5460
    • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
      "C:\Users\Admin\AppData\Local\steambooster\steambooster.exe"
      1⤵
      • Executes dropped EXE
      PID:1060
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2436
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe"
        2⤵
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3788
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 1932 -prefsLen 27097 -prefMapHandle 1936 -prefMapSize 270279 -ipcHandle 2020 -initialChannelId {1f6c4e2f-ea12-4899-9240-59f356707ff8} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu
          3⤵
            PID:5248
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 2404 -prefsLen 27133 -prefMapHandle 2408 -prefMapSize 270279 -ipcHandle 2416 -initialChannelId {b03e03a5-ac0f-406a-8f4d-c637c76c971d} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 2 socket
            3⤵
            • Checks processor information in registry
            PID:4492
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3840 -prefsLen 27274 -prefMapHandle 3844 -prefMapSize 270279 -jsInitHandle 3848 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 3856 -initialChannelId {3873b8a3-fef8-4e8e-99a7-3df8ce0f9867} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 3 tab
            3⤵
            • Checks processor information in registry
            PID:1276
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -prefsHandle 4032 -prefsLen 27274 -prefMapHandle 4036 -prefMapSize 270279 -ipcHandle 4100 -initialChannelId {88e7a08a-75f9-421a-a047-27c858ac6b15} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -appDir "C:\Program Files\Mozilla Firefox\browser" - 4 rdd
            3⤵
              PID:3212
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 3160 -prefsLen 34773 -prefMapHandle 4508 -prefMapSize 270279 -jsInitHandle 4512 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 4520 -initialChannelId {3108fb75-e7b1-432f-b02f-05bab02ea755} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 5 tab
              3⤵
              • Checks processor information in registry
              PID:4560
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250130195129 -sandboxingKind 0 -prefsHandle 4616 -prefsLen 35010 -prefMapHandle 4608 -prefMapSize 270279 -ipcHandle 5048 -initialChannelId {60f9cfdb-bc1b-4c02-b648-36c6ea280474} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 6 utility
              3⤵
              • Checks processor information in registry
              PID:6180
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5228 -prefsLen 32952 -prefMapHandle 5232 -prefMapSize 270279 -jsInitHandle 5236 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5248 -initialChannelId {21237834-85c6-4735-8531-d3e9b3a1bcb4} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 7 tab
              3⤵
              • Checks processor information in registry
              PID:6224
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5472 -prefsLen 32952 -prefMapHandle 5476 -prefMapSize 270279 -jsInitHandle 5480 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 2812 -initialChannelId {d0bb52f7-3e81-48ed-9473-09660143854e} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 8 tab
              3⤵
              • Checks processor information in registry
              PID:6240
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -isForBrowser -prefsHandle 5496 -prefsLen 32952 -prefMapHandle 5500 -prefMapSize 270279 -jsInitHandle 5504 -jsInitLen 253512 -parentBuildID 20250130195129 -ipcHandle 5208 -initialChannelId {9e338fcd-be48-4158-bc73-c44b3fe315fb} -parentPid 3788 -crashReporter "\\.\pipe\gecko-crash-server-pipe.3788" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 9 tab
              3⤵
              • Checks processor information in registry
              PID:6248
        • C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
          "C:\Users\Admin\AppData\Local\steambooster\steambooster.exe"
          1⤵
          • Executes dropped EXE
          PID:7140

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

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              Downloads

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 3KB
              • SHA256 cefec8aec92534a0ed7bf28c61bdf2edfb408b22d981db5461a75ba9f45b2452
              • MD5 SHA1 SHA512 TLSH

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 3KB
              • SHA256 297fdc9767f25cfae9d3741596fca215c7cd5e6ca9537acabe8392685a811cb5
              • MD5 SHA1 SHA512 TLSH

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 4KB
              • SHA256 2823ed25945f582689e8f5163c7afedda82a7b4fd3d6e35c7c231b2599ae1f28
              • MD5 SHA1 SHA512 SSDEEP TLSH

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 5KB
              • SHA256 589ee31ade50e3d63c2ae60703e76d224017f222d8165a355d73dba6cd8518ff
              • MD5 SHA1 SHA512 SSDEEP TLSH

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 5KB
              • SHA256 f906635ee6b7594ef514dce111f4f7792907e07e525ac8287d5247ae12adbc46
              • MD5 SHA1 SHA512 SSDEEP TLSH

              steambooster_2026-08-01.log

              • Path C:\Users\Admin\AppData\Local\steambooster\logs\steambooster_2026-08-01.log
              • Size 1KB
              • SHA256 7ffeaf358fb06440b31d53c0c58ac89a48932ecb435bb0fd55426125833e8482
              • MD5 SHA1 SHA512 TLSH

              steambooster.exe

              • Path C:\Users\Admin\AppData\Local\steambooster\steambooster.exe
              • Size 4.1MB
              • SHA256 a6686c497e7312610b52a40e5f20365bbfde405dcfd92132bae87715366b178b
              • MD5 SHA1 SHA512 SSDEEP TLSH

              SteamBooster by SteamBalance.lnk

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\SteamBooster by SteamBalance\SteamBooster by SteamBalance.lnk
              • Size 2KB
              • SHA256 1bcfe4fa107dbd0e8ad3ac640e5c404d72ba1c1573e4056a6030898940a440f4
              • MD5 SHA1 SHA512 TLSH

              Удалить SteamBooster by SteamBalance.lnk

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\SteamBooster by SteamBalance\Удалить SteamBooster by SteamBalance.lnk
              • Size 2KB
              • SHA256 fe2c4eb0e603c3d390e9ba3be097967bfbe2c63e446ad134749381f3989160d7
              • MD5 SHA1 SHA512 TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\db\data.safe.tmp
              • Size 6KB
              • SHA256 34e8fdbfed91c4a1541ec146c11a97acf27c523b6e8c550c31350495e2cffc25
              • MD5 SHA1 SHA512 SSDEEP TLSH

              data.safe.tmp

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\db\data.safe.tmp
              • Size 7KB
              • SHA256 b455393cc6a022d11bae40cedb5b79f4eb78d9888930ea2f1a8905cb0a9ac09d
              • MD5 SHA1 SHA512 SSDEEP TLSH

              events

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\events\events
              • Size 1KB
              • SHA256 5a7f869ba8dae95a5334ac49b80bd60678f05e54fe82ccf609f132b4adf69aa5
              • MD5 SHA1 SHA512 TLSH

              06e81645-2e23-45ad-bb60-66003818a21e

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\06e81645-2e23-45ad-bb60-66003818a21e
              • Size 235B
              • SHA256 28c53ecd6a613ca5aa7e524d93c8d1f4e6ee3cad775d59218ea100b62de2aa8d
              • MD5 SHA1 SHA512 TLSH

              1a8f8bd3-0b07-4afe-9224-69377e4b6e9e

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\1a8f8bd3-0b07-4afe-9224-69377e4b6e9e
              • Size 16KB
              • SHA256 e156e65a12cea72bd7c5a0a4e287f70cf0706349507ad7b39a7669d470c66395
              • MD5 SHA1 SHA512 SSDEEP TLSH

              486085c9-6aac-4e3d-a396-b7c0b53c53d1

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\486085c9-6aac-4e3d-a396-b7c0b53c53d1
              • Size 883B
              • SHA256 05c1875a6c10c7c96f7b831e6d25df1cbf59c4899e99616139250db47723d9f0
              • MD5 SHA1 SHA512 TLSH

              4ebcac9c-2c57-4b3c-ae06-b58a35e41f04

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\4ebcac9c-2c57-4b3c-ae06-b58a35e41f04
              • Size 2KB
              • SHA256 5aaea770159932829e5bb4ee78dd241c1b35c4eba9a95eae6a96a3c5a7078938
              • MD5 SHA1 SHA512 TLSH

              57e5eb80-c5e7-494d-90eb-4e47067405cd

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\57e5eb80-c5e7-494d-90eb-4e47067405cd
              • Size 235B
              • SHA256 53faa3fdf658217d0bfdd546a2a548b37c959a205f9ade1404e1de8e5547c991
              • MD5 SHA1 SHA512 TLSH

              e6fc1ed7-29d0-47c9-827f-033a64c05c5d

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\datareporting\glean\pending_pings\e6fc1ed7-29d0-47c9-827f-033a64c05c5d
              • Size 886B
              • SHA256 1ad08b4f6eea692ba792b619b28f711a4012d18f5db231ea8ca18bf65228aa93
              • MD5 SHA1 SHA512 TLSH

              prefs-1.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\prefs-1.js
              • Size 6KB
              • SHA256 a4bce7571a1420c143c49ecca92fd01a59dae54e9e0dd2d55384b4ea02e6dfa3
              • MD5 SHA1 SHA512 SSDEEP TLSH

              prefs.js

              • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\wg40zd9z.default-release\prefs.js
              • Size 6KB
              • SHA256 c66fa3bf6f8f648fa8561dad1fcb14ab3e98acba3b9162fe3c14055388c6aa67
              • MD5 SHA1 SHA512 SSDEEP TLSH

              SteamBooster.lnk

              • Path C:\Users\Admin\Desktop\SteamBooster.lnk
              • Size 2KB
              • SHA256 58c46d8b1f7eba0312857e024cab49f3c3b34754ea33cb7d5e6960b9bf5384a7
              • MD5 SHA1 SHA512 TLSH