Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    27-06-2022 12:08

General

  • Target

    Aplicativo Seguro.msi

  • Size

    10.3MB

  • MD5

    6b73ba5e07eb91c504be1ad2506a9c63

  • SHA1

    3d423b4c3c6fe9d35af3681762a664e226436e90

  • SHA256

    92dc494adf6c173a0fdae32868d57489b75fd9fb7b14c4d7fa9a6e06a2329ad3

  • SHA512

    5c033bf913c0173e2d454daa8cb50bc8ae22932cf0c46a18f150510789e2a7d2ff72d38813a6a0b8f27637991efdf30d5bdb8d8e2306b6056d2198331793e19e

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Themida packer 7 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 48 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 11 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 42 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I "C:\Users\Admin\AppData\Local\Temp\Aplicativo Seguro.msi"
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4176
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4236
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding ECB21804657EE93E2F7077076314057B
      2⤵
      • Loads dropped DLL
      PID:548
    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\MxStart.exe
      "C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\MxStart.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Drops startup file
      • Loads dropped DLL
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      PID:2940
  • C:\Windows\system32\werfault.exe
    werfault.exe /hc /shared Global\32ad25f7c9914bc5b48c1e5e4d7ad121 /t 3652 /p 3612
    1⤵
      PID:4216
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1232

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    4
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    5
    T1082

    Peripheral Device Discovery

    1
    T1120

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\MxStart.exe
      Filesize

      557KB

      MD5

      e33bcdd61d70a1961df2c6d7f0c18351

      SHA1

      958ff5402b7e05be694b00bb760f124b79fe0c7d

      SHA256

      b1aad17f65fbdb5fb75e13a00bd3b1db6e5168f8e4419e57b13fb34dc48c4ba4

      SHA512

      d4bb02140173417986d559b7ab96b3388478a4494ce652ac01e6a84297f86d772408aa6591ace45e75cce589298ee3a9a7864624a25a0cbd7d1ced197bd4946b

    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\MxStart.exe
      Filesize

      557KB

      MD5

      e33bcdd61d70a1961df2c6d7f0c18351

      SHA1

      958ff5402b7e05be694b00bb760f124b79fe0c7d

      SHA256

      b1aad17f65fbdb5fb75e13a00bd3b1db6e5168f8e4419e57b13fb34dc48c4ba4

      SHA512

      d4bb02140173417986d559b7ab96b3388478a4494ce652ac01e6a84297f86d772408aa6591ace45e75cce589298ee3a9a7864624a25a0cbd7d1ced197bd4946b

    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\aspack.dll
      Filesize

      580.3MB

      MD5

      0582afa730d47789165af96500a50abe

      SHA1

      3a04076e846b13a94ba9605ca33c4ea7e5dc3cec

      SHA256

      33200e0cb7bf6b51a02e8eb8edf86c70a2a9b337a75a8b22873244dfbdded885

      SHA512

      b447a9f615b6653eef82da1d4fae81f3dcba5df2a4345df78e9768ebea6e44cb468257d3fe801ded102a4ca7e9892a57dcb94fbb78f73ce4514566fc02ce70e5

    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\aspack.dll
      Filesize

      580.3MB

      MD5

      0582afa730d47789165af96500a50abe

      SHA1

      3a04076e846b13a94ba9605ca33c4ea7e5dc3cec

      SHA256

      33200e0cb7bf6b51a02e8eb8edf86c70a2a9b337a75a8b22873244dfbdded885

      SHA512

      b447a9f615b6653eef82da1d4fae81f3dcba5df2a4345df78e9768ebea6e44cb468257d3fe801ded102a4ca7e9892a57dcb94fbb78f73ce4514566fc02ce70e5

    • C:\Users\Admin\AppData\Roaming\Windows\Aplicação Segura\aspack.dll
      Filesize

      580.3MB

      MD5

      0582afa730d47789165af96500a50abe

      SHA1

      3a04076e846b13a94ba9605ca33c4ea7e5dc3cec

      SHA256

      33200e0cb7bf6b51a02e8eb8edf86c70a2a9b337a75a8b22873244dfbdded885

      SHA512

      b447a9f615b6653eef82da1d4fae81f3dcba5df2a4345df78e9768ebea6e44cb468257d3fe801ded102a4ca7e9892a57dcb94fbb78f73ce4514566fc02ce70e5

    • C:\Windows\Installer\MSIA3F5.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA3F5.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA648.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA648.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA6F5.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA6F5.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA792.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • C:\Windows\Installer\MSIA792.tmp
      Filesize

      540KB

      MD5

      dfc682d9f93d6dcd39524f1afcd0e00d

      SHA1

      adb81b1077d14dbe76d9ececfc3e027303075705

      SHA256

      f0f00100e20741444f8a6f5db8cc826515134622c3a82e4f53ba6237e97a8328

      SHA512

      52f84956b480bd06914a3615b75ad198a3ce821b0dd88dd30443bf4ea3d406349c95a115c31cb879775bd716563473909d22a8ec34253eca1aa7009845430bc9

    • memory/548-130-0x0000000000000000-mapping.dmp
    • memory/1232-162-0x000002D317990000-0x000002D3179B0000-memory.dmp
      Filesize

      128KB

    • memory/1232-173-0x000002D319469000-0x000002D31946C000-memory.dmp
      Filesize

      12KB

    • memory/1232-174-0x000002D319469000-0x000002D31946C000-memory.dmp
      Filesize

      12KB

    • memory/1232-172-0x000002D319469000-0x000002D31946C000-memory.dmp
      Filesize

      12KB

    • memory/1232-171-0x000002D319469000-0x000002D31946C000-memory.dmp
      Filesize

      12KB

    • memory/1232-163-0x000002D319140000-0x000002D319160000-memory.dmp
      Filesize

      128KB

    • memory/2940-146-0x00000000771C0000-0x0000000077363000-memory.dmp
      Filesize

      1.6MB

    • memory/2940-151-0x0000000000AD1000-0x0000000000E4F000-memory.dmp
      Filesize

      3.5MB

    • memory/2940-152-0x0000000000AD0000-0x00000000035AB000-memory.dmp
      Filesize

      42.9MB

    • memory/2940-153-0x00000000771C0000-0x0000000077363000-memory.dmp
      Filesize

      1.6MB

    • memory/2940-150-0x0000000000AD0000-0x00000000035AB000-memory.dmp
      Filesize

      42.9MB

    • memory/2940-149-0x0000000000AD0000-0x00000000035AB000-memory.dmp
      Filesize

      42.9MB

    • memory/2940-148-0x0000000000AD0000-0x00000000035AB000-memory.dmp
      Filesize

      42.9MB

    • memory/2940-147-0x0000000000AD1000-0x0000000000E4F000-memory.dmp
      Filesize

      3.5MB

    • memory/2940-139-0x0000000000000000-mapping.dmp
    • memory/2940-145-0x0000000000400000-0x0000000000544000-memory.dmp
      Filesize

      1.3MB