General

  • Target

    Remote Administration Tool.exe

  • Size

    3.1MB

  • Sample

    230804-2fs35afh9x

  • MD5

    73dcb3b3b59192b45f1975fc7a8e9d08

  • SHA1

    5fdaa30f92acc816c3b43db076f98c91391a3588

  • SHA256

    d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

  • SHA512

    adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

  • SSDEEP

    49152:zv2I22SsaNYfdPBldt698dBcjHPby3EfsAk/WPPoGdfTHHB72eh2NT:zvb22SsaNYfdPBldt6+dBcjHPby2H

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Infected

C2

AmirAmir8565-20409.portmap.host:20409

Mutex

ff410ede-beff-4970-8e12-7d251057f1fd

Attributes
  • encryption_key

    1B172706DED462B59F2A5056AB06A8DD1EE8491B

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Realtek Audio

  • subdirectory

    SubDir

Targets

    • Target

      Remote Administration Tool.exe

    • Size

      3.1MB

    • MD5

      73dcb3b3b59192b45f1975fc7a8e9d08

    • SHA1

      5fdaa30f92acc816c3b43db076f98c91391a3588

    • SHA256

      d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

    • SHA512

      adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

    • SSDEEP

      49152:zv2I22SsaNYfdPBldt698dBcjHPby3EfsAk/WPPoGdfTHHB72eh2NT:zvb22SsaNYfdPBldt6+dBcjHPby2H

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Downloads MZ/PE file

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Enumerates connected drives

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

    • 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.

MITRE ATT&CK Enterprise v15

Tasks