General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240729-vk3psstglc

  • MD5

    9a4f3b0223e0bcb90d5a08afdae6a169

  • SHA1

    b8ea3a64121a47f7a7abc73fc9a39d912b31a724

  • SHA256

    031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104

  • SHA512

    38ab6b70078807bc8c56f5c004ae4ef4a40690ec26bc896213a158765530caec5812b556a5555037ac986175fb1d4d588f1a982dd5e383a8c5734783507f6601

  • SSDEEP

    49152:SvHI22SsaNYfdPBldt698dBcjHJwRJ6cbR3LoGdFgTHHB72eh2NT:Svo22SsaNYfdPBldt6+dBcjHJwRJ6m

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.70:4782

Mutex

34828de8-c350-4dd4-85c9-16051c0443f7

Attributes
  • encryption_key

    2F1B645695C7578786A6BD1B6CD3966DFF24BC11

  • install_name

    sigmaexecutor.exe.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WIndows Updater

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      9a4f3b0223e0bcb90d5a08afdae6a169

    • SHA1

      b8ea3a64121a47f7a7abc73fc9a39d912b31a724

    • SHA256

      031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104

    • SHA512

      38ab6b70078807bc8c56f5c004ae4ef4a40690ec26bc896213a158765530caec5812b556a5555037ac986175fb1d4d588f1a982dd5e383a8c5734783507f6601

    • SSDEEP

      49152:SvHI22SsaNYfdPBldt698dBcjHJwRJ6cbR3LoGdFgTHHB72eh2NT:Svo22SsaNYfdPBldt6+dBcjHJwRJ6m

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Executes dropped EXE

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks