Analysis

  • max time kernel
    160s
  • max time network
    174s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    12/02/2022, 07:17

General

  • Target

    46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe

  • Size

    1013KB

  • MD5

    ce7fea497e325ef4b82a6eee9a96db8f

  • SHA1

    30e151ba95e25642bdcaafa78f6aba0cd3833173

  • SHA256

    46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607

  • SHA512

    4f80c8a091caf70adf51456d412701bb53f75a67f18b92af2b8d831c2b6442075ebd9801a8bb6db9008936a0c4e82c9155654709a572d57c32e853c4b44d5be1

Malware Config

Extracted

Family

cryptbot

C2

hevpxm41.top

morosf04.top

Attributes
  • payload_url

    http://kyrgvz05.top/download.php?file=kulmet.exe

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Reads user/profile data of web browsers 2 TTPs

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

  • 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.

  • Drops file in Windows directory 8 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 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe
    "C:\Users\Admin\AppData\Local\Temp\46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe"
    1⤵
    • Checks processor information in registry
    PID:4484
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:836
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:3952

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/836-133-0x0000024A88930000-0x0000024A88940000-memory.dmp

          Filesize

          64KB

        • memory/836-134-0x0000024A88990000-0x0000024A889A0000-memory.dmp

          Filesize

          64KB

        • memory/836-135-0x0000024A8B6B0000-0x0000024A8B6B4000-memory.dmp

          Filesize

          16KB

        • memory/4484-131-0x0000000000990000-0x0000000000991000-memory.dmp

          Filesize

          4KB

        • memory/4484-130-0x0000000000424000-0x0000000000426000-memory.dmp

          Filesize

          8KB

        • memory/4484-132-0x0000000000A30000-0x0000000000A78000-memory.dmp

          Filesize

          288KB