General

  • Target

    59e81448d0a99e76a3fbf0d4bb5bd0ffa391a9c90e7a3db9618d3bddfa27230a

  • Size

    212KB

  • Sample

    210921-gsxlvsbbdp

  • MD5

    dcc1ba9696537aaacfd42953dbbaf6f4

  • SHA1

    1392f1c64ab1df27648ed93aaed411a575034c47

  • SHA256

    59e81448d0a99e76a3fbf0d4bb5bd0ffa391a9c90e7a3db9618d3bddfa27230a

  • SHA512

    48fccb0a77bba42de5999c10ca96eb816ee7724d859ccf5ca483418df608a39f0924c82f4038f43ce4e367e612ba9113b6cd4b5b30b76879ead9301909c3c548

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://venerynnet1.top/

http://kevonahira2.top/

http://vegangelist3.top/

http://kingriffaele4.top/

http://arakeishant5.top/

rc4.i32
rc4.i32

Targets

    • Target

      59e81448d0a99e76a3fbf0d4bb5bd0ffa391a9c90e7a3db9618d3bddfa27230a

    • Size

      212KB

    • MD5

      dcc1ba9696537aaacfd42953dbbaf6f4

    • SHA1

      1392f1c64ab1df27648ed93aaed411a575034c47

    • SHA256

      59e81448d0a99e76a3fbf0d4bb5bd0ffa391a9c90e7a3db9618d3bddfa27230a

    • SHA512

      48fccb0a77bba42de5999c10ca96eb816ee7724d859ccf5ca483418df608a39f0924c82f4038f43ce4e367e612ba9113b6cd4b5b30b76879ead9301909c3c548

    • MedusaLocker

      Ransomware with several variants first seen in September 2019.

    • MedusaLocker Payload

    • Raccoon

      Simple but powerful infostealer which was very active in 2019.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Windows security bypass

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Modifies boot configuration data using bcdedit

    • XMRig Miner Payload

    • Creates new service(s)

    • Deletes System State backups

      Uses wbadmin.exe to inhibit system recovery.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • Deletes itself

    • Loads dropped DLL

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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 desktop.ini file(s)

    • Enumerates connected drives

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks