Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    28-04-2024 05:24

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 7 IoCs
  • Loads dropped DLL 7 IoCs
  • Themida packer 18 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:1220
    • \??\c:\users\admin\appdata\local\temp\main.exe 
      c:\users\admin\appdata\local\temp\main.exe 
      2⤵
      • Executes dropped EXE
      PID:2784
    • 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:2952
      • \??\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:2800
        • \??\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:2724
          • \??\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:2372
            • \??\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:2496
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 05:26 /f
              6⤵
              • Creates scheduled task(s)
              PID:1360
            • 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:2084
            • 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:1104
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:1688

    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

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

      3.3MB

      MD5

      e168624c9f4fad11c86c25d583cefb04

      SHA1

      a556c2fdfad5c51aba45adc409eaf7338d23a428

      SHA256

      d0047a3ee6b59e8818d228ed777ca9b89d24704a434d27b81684024a413f3fbe

      SHA512

      4b4b96e7db991280e9bcf882ad5d693d7347343ebdf100f6710e034b7c0f410c6e67b19646b0904571eb0bc852e0137ee4d236af23463c89f1cbc48b419c404d

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

      2.6MB

      MD5

      fae0220246e76e539ff48bab74664cd3

      SHA1

      cfea95b1abafa74e8bcefc6ba9515447317a7a9d

      SHA256

      71b2400130a0f890c6a2f843a62f11161285befb27de402a887df80c4494fa92

      SHA512

      3eb202570e5759a1962b8489ae4a69a09900b7f7cf97384060e7e26b8c83564ed7a4d9d5365bd992c8f5bd40fd25db4effe679ac674f1e03e5346a7758b748e9

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

      2.6MB

      MD5

      8fae25504ebef94f673e3c80794aebf2

      SHA1

      41c47bbb0df508aa7df176b341de0def27753bb5

      SHA256

      be5266e372e2a0a51e96f68b0d63399ec215b47424333846fa178dbfcf4c423f

      SHA512

      62ef06081c7f3bf5e1d197f804976479ce983203eb1001b5d9aaeb342d86b041711ad9075ef88952d37051bd2f3a22a391534543d9dd1340db801bde4b1c7aaa

    • \Windows\Resources\spoolsv.exe
      Filesize

      2.6MB

      MD5

      06a03b0b3cb30f666e96c47529e1292c

      SHA1

      ffaf45d47c0f7204c566420d0d7b78997763f79b

      SHA256

      22719a6c480b994aa6cb2e01fb1fdea4061d518a62bb4bbb86a0e156349f7af1

      SHA512

      425a4834c3bac134a4358b254b91da01d0a55e23ff7a6e7e00b9045b3ff49bc94660e526208983d06f936681df9283848d0cd61c99a391fd48b8ddcdc2900dd7

    • \Windows\Resources\svchost.exe
      Filesize

      2.6MB

      MD5

      bcd0f5c22362e4f806ef43ed919e8bf2

      SHA1

      667732e724953059271f1b5706aab9a7ddaece1e

      SHA256

      117b797e07adc1d67c18c331b13b24d6169a6ddb3bb0d36e43c7f45463c9b0ee

      SHA512

      86b536d4f0e515322e3b6b19dba1ef5ab3f017b4260ee65e203770ac7b8868b998cfbc8b07061f86a94639a983df248c0b4658f7172f13f33e87166749adeba8

    • memory/1220-28-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/1220-0-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/1220-1-0x0000000077380000-0x0000000077382000-memory.dmp
      Filesize

      8KB

    • memory/2372-94-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2372-73-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2372-61-0x0000000003250000-0x0000000003866000-memory.dmp
      Filesize

      6.1MB

    • memory/2372-54-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2496-62-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2496-67-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2724-43-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2724-69-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2800-42-0x00000000037F0000-0x0000000003E06000-memory.dmp
      Filesize

      6.1MB

    • memory/2800-72-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2800-74-0x00000000037F0000-0x0000000003E06000-memory.dmp
      Filesize

      6.1MB

    • memory/2800-85-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2800-30-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2952-16-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2952-71-0x0000000000400000-0x0000000000A16000-memory.dmp
      Filesize

      6.1MB

    • memory/2952-31-0x0000000003780000-0x0000000003D96000-memory.dmp
      Filesize

      6.1MB