General

  • Target

    b00ba7382dff5cb4acd3feb144edf4a172434c7e3f44971387596bf0dce60865

  • Size

    2.2MB

  • Sample

    240530-3cf5tseg88

  • MD5

    8bd5677c4861e887963159f143b584ac

  • SHA1

    77054b57afe1420443f9d201daf626f3ad7add94

  • SHA256

    b00ba7382dff5cb4acd3feb144edf4a172434c7e3f44971387596bf0dce60865

  • SHA512

    c32ca6bc895cefa605fa18b552d31fb2462a4d432f9c2e6c43b7079b37ce17767bc003530b279f4521d1f15cfe1fec60c4816b9ba31221c44f7a30d9e2433f04

  • SSDEEP

    24576:u582cRcXIETWG8dJ+xCQ4PkRX9i5d5DjYnKyL08w5PU+FoDz42P1jj9XOUpV7mRd:3REWXUCXkRX9i5dVgz42P1jxSRf29K

Malware Config

Extracted

Family

smokeloader

Botnet

pub2

Targets

    • Target

      b00ba7382dff5cb4acd3feb144edf4a172434c7e3f44971387596bf0dce60865

    • Size

      2.2MB

    • MD5

      8bd5677c4861e887963159f143b584ac

    • SHA1

      77054b57afe1420443f9d201daf626f3ad7add94

    • SHA256

      b00ba7382dff5cb4acd3feb144edf4a172434c7e3f44971387596bf0dce60865

    • SHA512

      c32ca6bc895cefa605fa18b552d31fb2462a4d432f9c2e6c43b7079b37ce17767bc003530b279f4521d1f15cfe1fec60c4816b9ba31221c44f7a30d9e2433f04

    • SSDEEP

      24576:u582cRcXIETWG8dJ+xCQ4PkRX9i5d5DjYnKyL08w5PU+FoDz42P1jj9XOUpV7mRd:3REWXUCXkRX9i5dVgz42P1jxSRf29K

    • Modifies firewall policy service

    • PrivateLoader

      PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Windows security bypass

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Maps connected drives based on registry

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks