Analysis

  • max time kernel
    150s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    01-07-2024 02:18

General

  • Target

    c1f137e967b895a9c21f96eb4e96d307ec964ac467f39215a9d834a2c0578cdb.exe

  • Size

    2.5MB

  • MD5

    d8874a5a86769a37d3147c2a6061d1c9

  • SHA1

    03a48cc2062073e998e010a8c4b458e05b99bcac

  • SHA256

    c1f137e967b895a9c21f96eb4e96d307ec964ac467f39215a9d834a2c0578cdb

  • SHA512

    6f7384152d78eec8433a04c8c5adf467cee47450b32d08a4baa04557cf2aa63d5194558bb005a95e728640f79d98886f4fe76ae75f39d18716212c6882709f89

  • SSDEEP

    49152:gxmvumkQ9lY9sgUXdTPSxdQ8KX75IyuWuCjcCqWOyxa:gxx9NUFkQx753uWuCyyxa

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Detects executables packed with Themida 16 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 5 IoCs
  • Checks BIOS information in registry 2 TTPs 10 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • Themida packer 16 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 5 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Drops file in Windows directory 4 IoCs
  • Scheduled Task/Job: Scheduled Task 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 10 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c1f137e967b895a9c21f96eb4e96d307ec964ac467f39215a9d834a2c0578cdb.exe
    "C:\Users\Admin\AppData\Local\Temp\c1f137e967b895a9c21f96eb4e96d307ec964ac467f39215a9d834a2c0578cdb.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:2940
    • \??\c:\windows\resources\themes\explorer.exe
      c:\windows\resources\themes\explorer.exe
      2⤵
      • 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:2764
      • \??\c:\windows\resources\spoolsv.exe
        c:\windows\resources\spoolsv.exe SE
        3⤵
        • 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:2588
        • \??\c:\windows\resources\svchost.exe
          c:\windows\resources\svchost.exe
          4⤵
          • 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:2744
          • \??\c:\windows\resources\spoolsv.exe
            c:\windows\resources\spoolsv.exe PR
            5⤵
            • 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:2660
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:21 /f
            5⤵
            • Scheduled Task/Job: Scheduled Task
            PID:2244
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:22 /f
            5⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1700
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:23 /f
            5⤵
            • Scheduled Task/Job: Scheduled Task
            PID:3012
      • C:\Windows\Explorer.exe
        C:\Windows\Explorer.exe
        3⤵
          PID:2664

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Execution

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Defense Evasion

    Hide Artifacts

    1
    T1564

    Hidden Files and Directories

    1
    T1564.001

    Modify Registry

    2
    T1112

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    2
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • \Windows\Resources\Themes\explorer.exe
      Filesize

      2.5MB

      MD5

      b9cb19cf61e663590a7b1ac222adb4fe

      SHA1

      694f1ce24f03a38e47c6fdbfeb814159c289300e

      SHA256

      6de071999518751c12686d1033be948cbfe9e50fd93178232f69d1af410d6c9b

      SHA512

      ac3d5e8242534852bc502823210a0d1c7352b5d03480acbed7695d07a77e5c6c906a7ffe356b6982f3e114f81c6338c032f48b4f347076e31aa4905e6f0d32fe

    • \Windows\Resources\spoolsv.exe
      Filesize

      2.5MB

      MD5

      94567a480a3e2ed9a818335188daa464

      SHA1

      a12a3dde92d1d31d2f2b593ceb82af62c9579bd1

      SHA256

      f3b14ebc281d219db46f9278b0ba8d45143ba6db5b9d29f78da6bc8fae44f5a7

      SHA512

      0b8159fba94d796ae372ec09d670a8a1d551082543c91da51da8fe446beef2a29dfd2aaf8421064f35c039bac66507d26235da7a87ff1ff3b1fd7a1d96d775db

    • \Windows\Resources\svchost.exe
      Filesize

      2.5MB

      MD5

      cbd36db7ca7c25a37e36e9da2c5bfcc5

      SHA1

      69e4f485285a2d1a54d9a0c08a4669e43f6627a5

      SHA256

      2703543d973bae9300bc11e1a830cbc83f10d72a8bffa3390b702e8c60866f01

      SHA512

      27550403a9952450215c43346cccede637be3cc2c419accbb6f4ed93523cefd03cbc29ec31f4db979447d33b4d5b32bdcf34bdffdca2c42855ae72de4749727b

    • memory/2588-50-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2588-24-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2588-35-0x00000000036B0000-0x0000000003CBE000-memory.dmp
      Filesize

      6.1MB

    • memory/2660-48-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2660-44-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2744-36-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2744-43-0x00000000032D0000-0x00000000038DE000-memory.dmp
      Filesize

      6.1MB

    • memory/2744-53-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-23-0x0000000003870000-0x0000000003E7E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-12-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-52-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-54-0x0000000003870000-0x0000000003E7E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-59-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2764-65-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2940-0-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB

    • memory/2940-11-0x00000000037B0000-0x0000000003DBE000-memory.dmp
      Filesize

      6.1MB

    • memory/2940-1-0x0000000077BC0000-0x0000000077BC2000-memory.dmp
      Filesize

      8KB

    • memory/2940-51-0x0000000000400000-0x0000000000A0E000-memory.dmp
      Filesize

      6.1MB