Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26-04-2024 10:54

General

  • Target

    newstuff.exe

  • Size

    2.8MB

  • MD5

    65f8a01db5c275706e9f13d875441b25

  • SHA1

    906103ef1d080d47a1159fce236c7450b95917f3

  • SHA256

    14c96fd6748713e8d1c561a073b6d777c4da7b31f3b1157c2698f24f16e75d5e

  • SHA512

    6d65b3cd5dfe6c8ca49032e01b79b9894ac0340ec6451a89e4199eb200983ac0d6c63952b70ec99c42a7ea72b30304ed2d5e6ea8980de1f8fbccc1d368498a7b

  • SSDEEP

    49152:XXzhpDtKSK1cb8PGK+Tfuqmpc3elWo8GnQAsYZEV4fa/me:XXzhW148Pd+Tf1mpcOldJQ3/V4yx

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 6 IoCs
  • Checks BIOS information in registry 2 TTPs 12 IoCs

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

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 6 IoCs
  • Themida packer 25 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Drops file in Windows directory 5 IoCs
  • Creates scheduled task(s) 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of SetWindowsHookEx 11 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\newstuff.exe
    "C:\Users\Admin\AppData\Local\Temp\newstuff.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2140
    • \??\c:\users\admin\appdata\local\temp\newstuff.exe 
      c:\users\admin\appdata\local\temp\newstuff.exe 
      2⤵
      • Executes dropped EXE
      PID:324
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:604
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in System32 directory
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1008
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Drops file in Windows directory
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2812
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Loads dropped DLL
            • Adds Run key to start application
            • Checks whether UAC is enabled
            • Drops file in System32 directory
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2100
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Identifies VirtualBox via ACPI registry values (likely anti-VM)
              • Checks BIOS information in registry
              • Executes dropped EXE
              • Checks whether UAC is enabled
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious use of SetWindowsHookEx
              PID:3004
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:57 /f
              6⤵
              • Creates scheduled task(s)
              PID:2488
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:58 /f
              6⤵
              • Creates scheduled task(s)
              PID:1528
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:59 /f
              6⤵
              • Creates scheduled task(s)
              PID:1016
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:2752

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Windows\Resources\Themes\explorer.exe

      Filesize

      2.6MB

      MD5

      88e18653a67cb9e112163c41d80fa66a

      SHA1

      960e27ca6828ca322833d9681bb2b7a18f6000bd

      SHA256

      7cb21a93ef440fc2226533b63fc3c5a973f1b9b6d955c9789bf55f9cd1af6998

      SHA512

      bb86763fb4e03fddd2778dc889cda1b996b7a8c17e20036b949d82c00a4df0b2e50d56d218ba6814f10799ba6194b0163430adf45f7bd3aca02f6537beba150e

    • C:\Windows\Resources\svchost.exe

      Filesize

      2.6MB

      MD5

      bc3c856d54b7c64a34821a372a417c60

      SHA1

      bc3700c0966c4e88e69e78db42671535a8449904

      SHA256

      a18bfe98dcf5ed821b7bab54799bc0bc153b9a33d5923cad491b1cabaf4f13a2

      SHA512

      73ba235c5cc1bf0a3b1ade3f744e469d92e7a823511291f7ca0ae9b519be6ce6723dd05d4b3f161e354c6b2d9a798e10a146c7c0d5e8cc67ef21818c1d297e21

    • \Users\Admin\AppData\Local\Temp\newstuff.exe 

      Filesize

      239KB

      MD5

      6109c703543ce917ab5b9975735f78ef

      SHA1

      88c6d3fc7076dce3826f8f03feac041cc15fd9b8

      SHA256

      3e1cb481036dba2c97f3d390b7266d194a2bc7b2640ddc085d8e9c8d43baa0b1

      SHA512

      94234381bff3cf743e3c441b820595a084794f822e35a2b91cf28cf59517eff4fb8d27cc6490861c463f78d03860b02e592a20a66e3b367a515460e9ccf3597e

    • \Windows\Resources\Themes\icsys.icn.exe

      Filesize

      2.6MB

      MD5

      d513836f9ae72161ba1a862e8e13c43a

      SHA1

      8ed0157cd5ecb06d10389841eef74dbc2a2bf1fa

      SHA256

      b92bd1d20732e76e41c0149cff89a6302c2f854730369a198843eef3adfdde95

      SHA512

      b9a895a1a71b0fd9a21e253cfbe575be6549611b8e44c67646410d776a6ccb283ae08e1abc8a30fedbc2f01fd482e79abccc8a2983bd42bf624fcd2ee10fd59a

    • \Windows\Resources\spoolsv.exe

      Filesize

      2.6MB

      MD5

      14645760d5ce292e03e61d919682356f

      SHA1

      b3adbf2661be8a546b6bb1bdac1473dbbf1e730a

      SHA256

      520d0eb116a1647997e1a908bb2ce40199e0a88ad75332d5f1a05c1300acb20d

      SHA512

      8dd3cbcdf3dc1ab31fa03ae3f92313737ae27184f33b948de9256e35b0d0f6587997c6a9c8809f8f586b1c0ec9901bdbce32e878c8e2d43fdb1818ebf2716dd3

    • memory/604-25-0x0000000003440000-0x0000000003A56000-memory.dmp

      Filesize

      6.1MB

    • memory/604-54-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/604-14-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/604-68-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/604-61-0x0000000003440000-0x0000000003A56000-memory.dmp

      Filesize

      6.1MB

    • memory/1008-26-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/1008-37-0x0000000003320000-0x0000000003936000-memory.dmp

      Filesize

      6.1MB

    • memory/1008-69-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/1008-90-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/1008-66-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2100-51-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2100-71-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2100-75-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-65-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-59-0x0000000003250000-0x0000000003866000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-67-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-49-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-0-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2140-1-0x0000000076F50000-0x0000000076F52000-memory.dmp

      Filesize

      8KB

    • memory/2812-50-0x0000000003230000-0x0000000003846000-memory.dmp

      Filesize

      6.1MB

    • memory/2812-38-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2812-70-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2812-72-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/3004-73-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/3004-60-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/3004-78-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB