Resubmissions

06-12-2022 13:52

221206-q6sdqsdc23 10

21-09-2022 08:18

220921-j7eqpsbdep 9

21-09-2022 07:05

220921-hwvr4sffe3 9

21-09-2022 05:39

220921-gca3xsahbn 9

Analysis

  • max time kernel
    508s
  • max time network
    511s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-09-2022 07:05

General

  • Target

    859c659aee8b897aeebf4b87364cc6d1.exe

  • Size

    2.4MB

  • MD5

    859c659aee8b897aeebf4b87364cc6d1

  • SHA1

    c362e37f2a75447fe19eab90a6eba3dd3fa402e7

  • SHA256

    b2fdf16f56a53ec57134d20655a23d5919c022a97cf7da4087bd6bf9f3704bb6

  • SHA512

    b5a1ddf62be64eb5b58e674032884095e5a4ec190f4a8944e71efdc7f1faf57cfd5a9af7cd3d3040c1c3912ea4afafbfbea5cbe8532d5326f5c8d48f304a7ee6

  • SSDEEP

    49152:d7BbOYaReQpAxY+TuQ/tymHRuKjQdT8K:nbOYakQpA++TuQ/tymHRumS

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Themida packer 16 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\859c659aee8b897aeebf4b87364cc6d1.exe
    "C:\Users\Admin\AppData\Local\Temp\859c659aee8b897aeebf4b87364cc6d1.exe"
    1⤵
    • Checks computer location settings
    • Maps connected drives based on registry
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2840
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\A3A745C56BDAE80F\lutzen.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4604
      • C:\Users\Admin\AppData\Roaming\A3A745C56BDAE80F\lutzen.exe
        C:\Users\Admin\AppData\Roaming\A3A745C56BDAE80F\lutzen.exe
        3⤵
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Checks whether UAC is enabled
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3268
        • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
          "C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Executes dropped EXE
          • Checks BIOS information in registry
          • Drops startup file
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious behavior: EnumeratesProcesses
          PID:4396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\859c659aee8b897aeebf4b87364cc6d1.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4820
      • C:\Windows\SysWOW64\timeout.exe
        timeout -t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2272

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\A3A745C56BDAE80F\lutzen.exe

    Filesize

    2.6MB

    MD5

    1c6a420c26ae08ca1f1d7e6a1ae1e462

    SHA1

    d3cbac0f481d7c6c1fb2274d533c9ce1756fe579

    SHA256

    43f6ee2aa859ad45bdc8afa4c2ea1f31f1925bee9a9eb5c716eec9ffb5c88cb3

    SHA512

    4b59323e8edd82a6ccd3ad6bf22f202f11679c7f5bcf0c24daae9e80b409d826730c794db4a1478a6e8ae91d8ad6c238f11f8ece6daee17c80d292fc53afe328

  • C:\Users\Admin\AppData\Roaming\A3A745C56BDAE80F\lutzen.exe

    Filesize

    2.6MB

    MD5

    1c6a420c26ae08ca1f1d7e6a1ae1e462

    SHA1

    d3cbac0f481d7c6c1fb2274d533c9ce1756fe579

    SHA256

    43f6ee2aa859ad45bdc8afa4c2ea1f31f1925bee9a9eb5c716eec9ffb5c88cb3

    SHA512

    4b59323e8edd82a6ccd3ad6bf22f202f11679c7f5bcf0c24daae9e80b409d826730c794db4a1478a6e8ae91d8ad6c238f11f8ece6daee17c80d292fc53afe328

  • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

    Filesize

    2.6MB

    MD5

    1c6a420c26ae08ca1f1d7e6a1ae1e462

    SHA1

    d3cbac0f481d7c6c1fb2274d533c9ce1756fe579

    SHA256

    43f6ee2aa859ad45bdc8afa4c2ea1f31f1925bee9a9eb5c716eec9ffb5c88cb3

    SHA512

    4b59323e8edd82a6ccd3ad6bf22f202f11679c7f5bcf0c24daae9e80b409d826730c794db4a1478a6e8ae91d8ad6c238f11f8ece6daee17c80d292fc53afe328

  • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

    Filesize

    2.6MB

    MD5

    1c6a420c26ae08ca1f1d7e6a1ae1e462

    SHA1

    d3cbac0f481d7c6c1fb2274d533c9ce1756fe579

    SHA256

    43f6ee2aa859ad45bdc8afa4c2ea1f31f1925bee9a9eb5c716eec9ffb5c88cb3

    SHA512

    4b59323e8edd82a6ccd3ad6bf22f202f11679c7f5bcf0c24daae9e80b409d826730c794db4a1478a6e8ae91d8ad6c238f11f8ece6daee17c80d292fc53afe328

  • memory/2840-135-0x00000000027C0000-0x0000000002880000-memory.dmp

    Filesize

    768KB

  • memory/2840-132-0x00000000027C0000-0x0000000002880000-memory.dmp

    Filesize

    768KB

  • memory/3268-144-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-149-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-141-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-142-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-143-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-145-0x0000000076EA0000-0x0000000077043000-memory.dmp

    Filesize

    1.6MB

  • memory/3268-140-0x0000000000210000-0x00000000008F8000-memory.dmp

    Filesize

    6.9MB

  • memory/3268-150-0x0000000076EA0000-0x0000000077043000-memory.dmp

    Filesize

    1.6MB

  • memory/4396-152-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-151-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-153-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-156-0x0000000076EA0000-0x0000000077043000-memory.dmp

    Filesize

    1.6MB

  • memory/4396-155-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-154-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-157-0x0000000000790000-0x0000000000E78000-memory.dmp

    Filesize

    6.9MB

  • memory/4396-158-0x0000000076EA0000-0x0000000077043000-memory.dmp

    Filesize

    1.6MB