Analysis

  • max time kernel
    17s
  • max time network
    117s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    30-07-2021 15:25

General

  • Target

    18ccb7df2f91787a9392bf60d2f7019c86af65584c8a9c4846dee62e3240912a.exe

  • Size

    647KB

  • MD5

    cdf94f8f45a48e6092f6265304b71aa9

  • SHA1

    90ab6d5b9e2882a4b0f5f60e929170bbcd6c5283

  • SHA256

    18ccb7df2f91787a9392bf60d2f7019c86af65584c8a9c4846dee62e3240912a

  • SHA512

    e635c8dc0c23438d7bc9193238187403a61fae05e90f2ab3cf534278b2c6b5d0dca278518ab18583105b82140a3001dd38d37425dc249848fc1fc51fa956cc64

Malware Config

Extracted

Family

cryptbot

C2

wymesc72.top

morjed07.top

Attributes
  • payload_url

    http://hoftsi10.top/download.php?file=lv.exe

Signatures

  • CryptBot

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

  • CryptBot Payload 1 IoCs
  • 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.

  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\18ccb7df2f91787a9392bf60d2f7019c86af65584c8a9c4846dee62e3240912a.exe
    "C:\Users\Admin\AppData\Local\Temp\18ccb7df2f91787a9392bf60d2f7019c86af65584c8a9c4846dee62e3240912a.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:1880
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\CkgkhBQvTHJb & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\18ccb7df2f91787a9392bf60d2f7019c86af65584c8a9c4846dee62e3240912a.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3416
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1792

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1880-114-0x0000000000970000-0x0000000000ABA000-memory.dmp

    Filesize

    1.3MB

  • memory/1880-115-0x0000000000400000-0x000000000090B000-memory.dmp

    Filesize

    5.0MB