Analysis

  • max time kernel
    150s
  • max time network
    276s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/07/2024, 18:18

General

  • Target
    avast_free_antivirus_setup_online.exe
  • Size 257KB
  • Sample240718-wxwbxstdqf
  • SHA256 1fb53cd33d285e2807dca6ee3005689f1425b363c46b377958a7431a46488207
  • MD5 SHA1 SHA512 SSDEEP
Score
6/10

Malware Config

Signatures

  • Checks for any installed AV software in registry 1 TTPs 52 IoCs
  • Downloads MZ/PE file
  • Writes to the Master Boot Record (MBR) 1 TTPs 4 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Executes dropped EXE 11 IoCs
  • Loads dropped DLL 13 IoCs
  • Checks processor information in registry 2 TTPs 15 IoCs

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

  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe
    "C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3652
    • C:\Windows\Temp\asw.d7274063b53d7561\avast_free_antivirus_setup_online_x64.exe
      "C:\Windows\Temp\asw.d7274063b53d7561\avast_free_antivirus_setup_online_x64.exe" /cookie:mmm_ava_998_999_000_m:dlid_FAV-ONLINE-FAD /ga_clientid:b6e4a8b0-6b49-4a2b-8841-5df4032d5156 /edat_dir:C:\Windows\Temp\asw.d7274063b53d7561
      2⤵
      • Checks for any installed AV software in registry
      • Writes to the Master Boot Record (MBR)
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:984
      • C:\Windows\Temp\asw.24df6efd02333361\instup.exe
        "C:\Windows\Temp\asw.24df6efd02333361\instup.exe" /sfx:lite /sfxstorage:C:\Windows\Temp\asw.24df6efd02333361 /edition:1 /prod:ais /stub_context:ae1b349d-5bf8-499f-bb47-4dee2c9717ee:9925720 /guid:b7957aff-ddb7-401f-bf25-13dfab1ddb7c /ga_clientid:b6e4a8b0-6b49-4a2b-8841-5df4032d5156 /no_delayed_installation /cookie:mmm_ava_998_999_000_m:dlid_FAV-ONLINE-FAD /ga_clientid:b6e4a8b0-6b49-4a2b-8841-5df4032d5156 /edat_dir:C:\Windows\Temp\asw.d7274063b53d7561
        3⤵
        • Checks for any installed AV software in registry
        • Writes to the Master Boot Record (MBR)
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:520
        • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\instup.exe
          "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\instup.exe" /sfx /sfxstorage:C:\Windows\Temp\asw.24df6efd02333361 /edition:1 /prod:ais /stub_context:ae1b349d-5bf8-499f-bb47-4dee2c9717ee:9925720 /guid:b7957aff-ddb7-401f-bf25-13dfab1ddb7c /ga_clientid:b6e4a8b0-6b49-4a2b-8841-5df4032d5156 /no_delayed_installation /cookie:mmm_ava_998_999_000_m:dlid_FAV-ONLINE-FAD /edat_dir:C:\Windows\Temp\asw.d7274063b53d7561 /online_installer
          4⤵
          • Checks for any installed AV software in registry
          • Writes to the Master Boot Record (MBR)
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks processor information in registry
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:612
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" -checkGToolbar -elevated
            5⤵
            • Executes dropped EXE
            PID:1840
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" /check_secure_browser
            5⤵
            • Executes dropped EXE
            PID:564
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" -checkChrome -elevated
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:3700
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" -checkChromeReactivation -elevated -bc=AVFC
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1952
            • C:\Users\Public\Documents\aswOfferTool.exe
              "C:\Users\Public\Documents\aswOfferTool.exe" -checkChromeReactivation -bc=AVFC
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              PID:4532
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" -checkChromeReactivation -elevated -bc=AVFC
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:316
            • C:\Users\Public\Documents\aswOfferTool.exe
              "C:\Users\Public\Documents\aswOfferTool.exe" -checkChromeReactivation -bc=AVFC
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              PID:2932
          • C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe
            "C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\aswOfferTool.exe" -checkChrome -elevated
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:548

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        Setup.log

        • Path C:\ProgramData\Avast Software\Persistent Data\Avast\Logs\Setup.log
        • Size 26KB
        • SHA256 ad156c027bb8a69928136f8ef7132673fca3f488aa596a27b09283d8455a8980
        • MD5 SHA1 SHA512 SSDEEP

        Setup.log

        • Path C:\ProgramData\Avast Software\Persistent Data\Avast\Logs\Setup.log
        • Size 1KB
        • SHA256 a6db84eda932f68d7831eb8b049cbdc53053a7e6898f1693d7eb7f006136d627
        • MD5 SHA1 SHA512

        event_manager.log

        • Path C:\ProgramData\Avast Software\Persistent Data\Avast\Logs\event_manager.log
        • Size 281B
        • SHA256 68042f25da37cd2c58c32293e2b0cfb9165eada26fb1e00433fe56185c3379b9
        • MD5 SHA1 SHA512

        HTMLayout.dll

        • Path C:\Windows\Temp\asw.24df6efd02333361\HTMLayout.dll
        • Size 4.0MB
        • SHA256 9e8669adde471d36dff8cc760b1387d68f9370a668ac1669d1427fede56540b0
        • MD5 SHA1 SHA512 SSDEEP

        Instup.dll

        • Path C:\Windows\Temp\asw.24df6efd02333361\Instup.dll
        • Size 18.1MB
        • SHA256 8add358f520ba6dde2aa14abf0f04a0a0739929465780e910af4bcfe47287932
        • MD5 SHA1 SHA512 SSDEEP

        Instup.exe

        • Path C:\Windows\Temp\asw.24df6efd02333361\Instup.exe
        • Size 3.6MB
        • SHA256 778ef3bac5b93ab1848321b34922411403ee45972db240e2b5ec77688fd78985
        • MD5 SHA1 SHA512 SSDEEP

        gcapi.dll

        • Path C:\Windows\Temp\asw.24df6efd02333361\New_180617e9\gcapi.dll
        • Size 867KB
        • SHA256 e0d08b9da7e502ad8c75f8be52e9a08a6bcd0c5f98d360704173be33777e4905
        • MD5 SHA1 SHA512 SSDEEP

        avbugreport_x64_ais-a42.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\avbugreport_x64_ais-a42.vpx
        • Size 4.7MB
        • SHA256 ffef8170d192509f527d6a23584528a0b9676f0c11b88ff5c079fb8b5e79c2f7
        • MD5 SHA1 SHA512 SSDEEP

        avdump_x64_ais-a42.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\avdump_x64_ais-a42.vpx
        • Size 3.3MB
        • SHA256 435b0c4824c9aa637ca7c3335d4123d7a67a6c6818348f88eb7c00d70ded8221
        • MD5 SHA1 SHA512 SSDEEP

        config.def

        • Path C:\Windows\Temp\asw.24df6efd02333361\config.def
        • Size 29KB
        • SHA256 1f1e4dfd55a6c8e581f475790dce8d8fc1ac2676b2fcc16fd732916c307a75e9
        • MD5 SHA1 SHA512 SSDEEP

        config.def

        • Path C:\Windows\Temp\asw.24df6efd02333361\config.def
        • Size 29KB
        • SHA256 bcba89775a33df569136023f60431ebaa43c928639c11170dfce116f0b6e51db
        • MD5 SHA1 SHA512 SSDEEP

        config.def

        • Path C:\Windows\Temp\asw.24df6efd02333361\config.def
        • Size 36KB
        • SHA256 ad61fcdd314aab791834018a361ca6a04bd0970dd05f441ccb53c350b0596ce0
        • MD5 SHA1 SHA512 SSDEEP

        config.ini

        • Path C:\Windows\Temp\asw.24df6efd02333361\config.ini
        • Size 883B
        • SHA256 a27fac9a6722a021a40cf1315dad4d852649035cd62cf9f951108659b7fbafd9
        • MD5 SHA1 SHA512

        offertool_x64_ais-a42.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\offertool_x64_ais-a42.vpx
        • Size 2.3MB
        • SHA256 ef9ba8d3348eae59ffb7835eed786efb2f3f87babe784a2b7e3fb247bbf53cfd
        • MD5 SHA1 SHA512 SSDEEP

        part-jrog2-1513.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\part-jrog2-1513.vpx
        • Size 695B
        • SHA256 5a85c46d8656abdca1e9971ed783f930d0fc612a728e73c4e6d8d6b525155a61
        • MD5 SHA1 SHA512

        part-prg_ais-180617e9.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\part-prg_ais-180617e9.vpx
        • Size 74KB
        • SHA256 eb01d6e0b5d1519c05720040a8887782c3e73adf9e406fc739e2afb2cdc4e0e1
        • MD5 SHA1 SHA512 SSDEEP

        part-setup_ais-180617e9.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\part-setup_ais-180617e9.vpx
        • Size 4KB
        • SHA256 d3b0db1d7070d8917811b2e0b2b662ab0c7b01b74567b2e655b7f03a35237c5b
        • MD5 SHA1 SHA512 SSDEEP

        part-vps_windows-24071806.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\part-vps_windows-24071806.vpx
        • Size 11KB
        • SHA256 42e41b74eeecc3b52db3c3e40868663dd9b9f2c0f089e4d99c66c7769b9f78ef
        • MD5 SHA1 SHA512 SSDEEP

        prod-pgm.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\prod-pgm.vpx
        • Size 573B
        • SHA256 94d3fafb73f128ec140815eef45bc9dcf8166d54fb575527108effc0e7bb1e39
        • MD5 SHA1 SHA512

        prod-vps.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\prod-vps.vpx
        • Size 342B
        • SHA256 dce2bf3c5b81259cd50c8e61dcd2da461ecadba256a5aa82fc1e1de2f66f9666
        • MD5 SHA1 SHA512

        prod-vps.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\prod-vps.vpx
        • Size 343B
        • SHA256 c9a8b3971644ae9dbb026053768ce326e61656a13e5f3e1071a2d485bd903fcc
        • MD5 SHA1 SHA512

        sbr_x64_ais-a42.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\sbr_x64_ais-a42.vpx
        • Size 19KB
        • SHA256 6c6ba59c14e1518f8f3c5d5426a402391088f096dbc1328c7557dfc65c38feb6
        • MD5 SHA1 SHA512 SSDEEP

        servers.def

        • Path C:\Windows\Temp\asw.24df6efd02333361\servers.def
        • Size 29KB
        • SHA256 fc454821159496cc8c3e5fdb41e3f3c855746ea94b27b6247677c2e8e4c30624
        • MD5 SHA1 SHA512 SSDEEP

        servers.def.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\servers.def.vpx
        • Size 2KB
        • SHA256 3c362bbb1014fa517abc47ecc325989ddd6b8fdd22302506591ea9ea4f7a2aeb
        • MD5 SHA1 SHA512

        setup.def

        • Path C:\Windows\Temp\asw.24df6efd02333361\setup.def
        • Size 38KB
        • SHA256 dbccb1e807254fc3abd86c1a094289eb68d7129631069c3ece96ad032f84da7c
        • MD5 SHA1 SHA512 SSDEEP

        uat64.dll

        • Path C:\Windows\Temp\asw.24df6efd02333361\uat64.dll
        • Size 29KB
        • SHA256 c240e8b6271c51c11dccf41a5ac3b6f312208e3205336087af4785d433841a0f
        • MD5 SHA1 SHA512 SSDEEP

        uat64.vpx

        • Path C:\Windows\Temp\asw.24df6efd02333361\uat64.vpx
        • Size 16KB
        • SHA256 884d7de18df38995ab864b9daec048a1ba8c8d3bcf54642d4c366b5c9a29a1ed
        • MD5 SHA1 SHA512 SSDEEP

        avast_free_antivirus_setup_online_x64.exe

        • Path C:\Windows\Temp\asw.d7274063b53d7561\avast_free_antivirus_setup_online_x64.exe
        • Size 9.5MB
        • SHA256 f552e5fc3f987f3d6140b315e8166febefcbdc1b1a7a104368c6c20df2f5825d
        • MD5 SHA1 SHA512 SSDEEP

        ecoo.edat

        • Path C:\Windows\Temp\asw.d7274063b53d7561\ecoo.edat
        • Size 41B
        • SHA256 1dd1226be9bebecf9b526e5ad68b5d1c26c2d9d5dc375ce715c3fb010ea4e519
        • MD5 SHA1 SHA512