General

  • Target

    48578ca46a647e621583b8b3da2bbbc4_JaffaCakes118

  • Size

    1.2MB

  • Sample

    240515-2e76nafc8z

  • MD5

    48578ca46a647e621583b8b3da2bbbc4

  • SHA1

    d18da5d905ddc8977a63019df1aa32032c94a946

  • SHA256

    2261f624e99b92e00913fd0fc189ae96bb115b3ae5b393e0170066f032b12af1

  • SHA512

    55da81e0b1002f6678d64989939836606c40da7b65c43be12de41e0b5a365ed73d9b97aa41f94f9deea5d813707353630b7c70740f523af5aa576dd80bdde0ec

  • SSDEEP

    24576:X53uhF8ZcjXB476PaZMr5U3aDAWaPUPTRNTwX6KR8+:X5+hFxPaZSCOtNkq8

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

C2

5.45.65.1:5552

Mutex

yeGmQfVnPgbImyPaxF

Attributes
  • encryption_key

    983PIud97BRSEjju8fCD

  • install_name

    csrss.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    NET framework

  • subdirectory

    SubDir

Targets

    • Target

      48578ca46a647e621583b8b3da2bbbc4_JaffaCakes118

    • Size

      1.2MB

    • MD5

      48578ca46a647e621583b8b3da2bbbc4

    • SHA1

      d18da5d905ddc8977a63019df1aa32032c94a946

    • SHA256

      2261f624e99b92e00913fd0fc189ae96bb115b3ae5b393e0170066f032b12af1

    • SHA512

      55da81e0b1002f6678d64989939836606c40da7b65c43be12de41e0b5a365ed73d9b97aa41f94f9deea5d813707353630b7c70740f523af5aa576dd80bdde0ec

    • SSDEEP

      24576:X53uhF8ZcjXB476PaZMr5U3aDAWaPUPTRNTwX6KR8+:X5+hFxPaZSCOtNkq8

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks