Analysis

  • max time kernel
    90s
  • max time network
    98s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240709-en
  • resource tags

    arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    15-07-2024 12:59

General

  • Target

    bf79919191223b5ee5fc8c37e8a935ed1fdc9f4c3914e9ffac99294189454c7b.exe

  • Size

    389KB

  • MD5

    47ff8fbb71f31e9e0a668b3aba565856

  • SHA1

    f0e6879976bdb7170482a6d6bb6affe6b5ba540d

  • SHA256

    bf79919191223b5ee5fc8c37e8a935ed1fdc9f4c3914e9ffac99294189454c7b

  • SHA512

    0c12987d00766b687eb616feca7e0a8fbd56b83373e09516e2ffedcdf768b5e0061beddef6a2df48ba18c3e99074ca2a9ca948ab90615482e32efdcd78bee404

  • SSDEEP

    6144:GlYLVyMiFkeLnCUcx/IcoN6OpMW6/qYAq1TMZZZuSOXg7i+lJ3N8pFf8z/XU2diS:GeiFHnC5GeQZZZZOQ7D/EFfW7i87EO

Malware Config

Extracted

Family

stealc

Botnet

default

C2

http://85.28.47.101

Attributes
  • url_path

    /f3ee98d7eec07fb9.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf79919191223b5ee5fc8c37e8a935ed1fdc9f4c3914e9ffac99294189454c7b.exe
    "C:\Users\Admin\AppData\Local\Temp\bf79919191223b5ee5fc8c37e8a935ed1fdc9f4c3914e9ffac99294189454c7b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1244

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • C:\ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/1244-1-0x0000000000400000-0x000000000063C000-memory.dmp

    Filesize

    2.2MB

  • memory/1244-3-0x0000000000400000-0x000000000063C000-memory.dmp

    Filesize

    2.2MB

  • memory/1244-4-0x0000000000400000-0x000000000063C000-memory.dmp

    Filesize

    2.2MB

  • memory/1244-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/1244-77-0x0000000000400000-0x000000000063C000-memory.dmp

    Filesize

    2.2MB

  • memory/2460-0-0x0000000002E10000-0x0000000002E11000-memory.dmp

    Filesize

    4KB