Analysis

  • max time kernel
    45s
  • max time network
    110s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2022, 09:00

General

  • Target
    file.exe
  • Size 5.0MB
  • Sample221010-kybhcsbdgr
  • SHA256 cf9ec473c74f0c8a122612aac898a544259bca56ed65cf13078671b192d2b18e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vidar

Version
  • 54.9

Botnet
  • 1679

C2
  • https://t.me/larsenup

  • https://ioc.exchange/@zebra54

Attributes
  • profile_id

    1679

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.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
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    PID:1672

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        mozglue.dll

        • Path \ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path \ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        memory/1672-58-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

        memory/1672-59-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-60-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-61-0x0000000077560000-0x00000000776E0000-memory.dmp

        memory/1672-62-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-63-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/1672-57-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-55-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-83-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-84-0x0000000000400000-0x0000000000CE9000-memory.dmp

        memory/1672-85-0x0000000077560000-0x00000000776E0000-memory.dmp