Analysis

  • max time kernel
    150s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    28-04-2024 05:25

General

  • Target

    main.exe

  • Size

    5.9MB

  • MD5

    3354496085a148bf84e4b9249d8ab9b2

  • SHA1

    7f5a53faa73edac8a2999bc8624b8c8ce943f06a

  • SHA256

    43cf51ea2ac2ea60017c077d196d9719c6217548510619aa8ac18c6657163c55

  • SHA512

    66c9f316002593745d1b7e141c5c0cc70695f50f140ac2b9b32753a89ac3c482a3ca57afa825a2bd6c6e72855ac4367eb0ea1b933974fc3592739b63a93c71df

  • SSDEEP

    98304:TXzhW148Pd+Tf1mpcOldJQ3/V5s18HdDo45ow3ONp2MTJs9wplordZNum6vukIP0:zFK4s0TfLOdo/bs1moU2N8AMmofNum6z

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 7 IoCs
  • Themida packer 19 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
  • Detects Pyinstaller 1 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 12 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\main.exe
    "C:\Users\Admin\AppData\Local\Temp\main.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:1540
    • \??\c:\users\admin\appdata\local\temp\main.exe 
      c:\users\admin\appdata\local\temp\main.exe 
      2⤵
      • Executes dropped EXE
      PID:2152
    • 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:2556
      • \??\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:2632
        • \??\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:2728
          • \??\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:2520
            • \??\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:2528
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 05:27 /f
              6⤵
              • Creates scheduled task(s)
              PID:576
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 05:28 /f
              6⤵
              • Creates scheduled task(s)
              PID:1216
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 05:29 /f
              6⤵
              • Creates scheduled task(s)
              PID:1436
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:1432

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Execution

    Scheduled Task/Job

    1
    T1053

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    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

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

      2.6MB

      MD5

      1534fb43e8f5bd15fa130b2b787f42be

      SHA1

      9bf63f29670c5f04d750b36a639e12631ee86344

      SHA256

      1f005a98b6c0818b849ac63fc68a95eebfed5cac5566f4b0d9d0bd48fdb4a04c

      SHA512

      a087b2ad088dc8c2d2ce5e9104dbd2f8936bd538a9f45d51826b40595b376ca718e5326a4d18465a0e8f12abdadda133148e9decd999a11eff9850e3fee03772

    • C:\Windows\Resources\Themes\icsys.icn.exe
      Filesize

      2.6MB

      MD5

      8fae25504ebef94f673e3c80794aebf2

      SHA1

      41c47bbb0df508aa7df176b341de0def27753bb5

      SHA256

      be5266e372e2a0a51e96f68b0d63399ec215b47424333846fa178dbfcf4c423f

      SHA512

      62ef06081c7f3bf5e1d197f804976479ce983203eb1001b5d9aaeb342d86b041711ad9075ef88952d37051bd2f3a22a391534543d9dd1340db801bde4b1c7aaa

    • \Users\Admin\AppData\Local\Temp\main.exe 
      Filesize

      3.3MB

      MD5

      e168624c9f4fad11c86c25d583cefb04

      SHA1

      a556c2fdfad5c51aba45adc409eaf7338d23a428

      SHA256

      d0047a3ee6b59e8818d228ed777ca9b89d24704a434d27b81684024a413f3fbe

      SHA512

      4b4b96e7db991280e9bcf882ad5d693d7347343ebdf100f6710e034b7c0f410c6e67b19646b0904571eb0bc852e0137ee4d236af23463c89f1cbc48b419c404d

    • \Windows\Resources\spoolsv.exe
      Filesize

      2.6MB

      MD5

      61531f91657a5a94b2a337fce4572f19

      SHA1

      c5d82331b42c21c2690d33a7fe83dae09e95c3a7

      SHA256

      f16024b0b1bf7969d8b8f29ff5c4b850a79623b6e869e2ae08c6e25adf3583e1

      SHA512

      f1850984b19f53e0db939cfa5ac048c666453b7fdd3aab54113f1426568b439e57cbe20a35922d6ae31b549003b00c565d8e1a9a133a4cb87ca9012d5ed57d2c

    • \Windows\Resources\svchost.exe
      Filesize

      2.6MB

      MD5

      04df2da091e30b70d9fc0bfec485d08f

      SHA1

      b6bbc544f91ac657603d182a2a48bc7391e6aa51

      SHA256

      6e0e772e103ca315e63b3030e9f389771ea4ea3125c6f6f0319fdb33edf518b5

      SHA512

      e056aec5d0f423fa2b9d7e3e814760f6fcc24b2c9717d36f4ff70c9fb900eac517a3997628293e9ff674491b1c0f03e81937a8ef5cccd0e514f0f63b4b92dd32

    • memory/1540-69-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/1540-0-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/1540-60-0x0000000003230000-0x0000000003846000-memory.dmp
      Filesize

      6.1MB

    • memory/1540-1-0x0000000077BF0000-0x0000000077BF2000-memory.dmp
      Filesize

      8KB

    • memory/1540-51-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2520-58-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2520-75-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2520-71-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2528-59-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2528-65-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2556-27-0x0000000003370000-0x0000000003986000-memory.dmp
      Filesize

      6.1MB

    • memory/2556-68-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2556-16-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2632-39-0x0000000003370000-0x0000000003986000-memory.dmp
      Filesize

      6.1MB

    • memory/2632-70-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2632-73-0x0000000003370000-0x0000000003986000-memory.dmp
      Filesize

      6.1MB

    • memory/2632-28-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2632-84-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2728-40-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2728-67-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB