Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/10/2026, 07:05

General

  • Target
    2026-10-01_a3b88fd47234b115edaa8544613641b4_amadey_coinminer_cryptolocker_elex_smoke-loader_stealc_stop_tofsee.exe
  • Size 1.7MB
  • Sample261002-hwjpvaxtaz
  • SHA256 ad0fd62b4a3d1dae95b6ee066844fdc14b1aad531ef7f8e90feee837e4cb2d61
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Stealc

    Stealc is an infostealer written in C++.

  • Detects Stealc stealer Version 3 1 IoCs
  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • UPX dump on OEP (original entry point) 6 IoCs
  • Executes dropped EXE 1 IoCs
  • Unexpected DNS network traffic destination 20 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Drops file in System32 directory 13 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 2 IoCs
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-10-01_a3b88fd47234b115edaa8544613641b4_amadey_coinminer_cryptolocker_elex_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-01_a3b88fd47234b115edaa8544613641b4_amadey_coinminer_cryptolocker_elex_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • Unexpected DNS network traffic destination
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1064
  • C:\Windows\Syswow64\4f81cd6c
    C:\Windows\Syswow64\4f81cd6c
    1⤵
    • Executes dropped EXE
    • Unexpected DNS network traffic destination
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1832

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        4f81cd6c

        • Path C:\Windows\SysWOW64\4f81cd6c
        • Size 1.7MB
        • SHA256 e485be6b500c42ccbf58895349911e1a24a925800b2840739581ca7a168f0ee1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1064-0-0x0000000000900000-0x000000000098C000-memory.dmp

        memory/1064-18-0x0000000000900000-0x000000000098C000-memory.dmp

        memory/1832-3-0x0000000000B50000-0x0000000000BDC000-memory.dmp

        memory/1832-19-0x0000000000B50000-0x0000000000BDC000-memory.dmp

        memory/1832-38-0x0000000000B50000-0x0000000000BDC000-memory.dmp