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Analysis

  • max time kernel
    30s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    02/06/2023, 01:24

General

  • Target

    424da66262521997e7c0e25473dc47cd.exe

  • Size

    241KB

  • MD5

    424da66262521997e7c0e25473dc47cd

  • SHA1

    a36280281ef8b413094cf210e15cef202e33a8cd

  • SHA256

    02c7045ceba40c4162507a22acffe17050e59af9afc0df57f5bca99c798c14fb

  • SHA512

    208861454a1553ea8d57ad26fa6d34eb99541aa17c135353baac57848baf61be0344dfdb9b5e9fa7801394b11f79ca3658bdfb708ed09fa976787fae161a722e

  • SSDEEP

    6144:nqTwsCf61IKYjsDO1GYldohrSrN1p2FOC+7D3B:nNh61JMs6Y42rSvpb

Malware Config

Extracted

Family

stealc

C2

http://publisherget.top/410b5129171f10ea.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • 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 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).

  • 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 behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\424da66262521997e7c0e25473dc47cd.exe
    "C:\Users\Admin\AppData\Local\Temp\424da66262521997e7c0e25473dc47cd.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\424da66262521997e7c0e25473dc47cd.exe" & del "C:\ProgramData\*.dll"" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1620
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:1984

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/1364-55-0x0000000000220000-0x0000000000237000-memory.dmp

    Filesize

    92KB

  • memory/1364-56-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/1364-94-0x0000000000400000-0x00000000006BF000-memory.dmp

    Filesize

    2.7MB

  • memory/1364-129-0x0000000000400000-0x00000000006BF000-memory.dmp

    Filesize

    2.7MB