General

  • Target

    73c5b71d2923b11a8b262321c6229520c93115f82c78d742f041a650725d482f.zip

  • Size

    20KB

  • Sample

    240402-qcynnaah82

  • MD5

    1cd77e52b079c64e8a892744e45f828a

  • SHA1

    bd8811bf6b67269e4981eaeca9406756e8c400d8

  • SHA256

    1cfaf6b24227b155e1d383f558892b08380c05fdbaa22482b6411eb7457bd282

  • SHA512

    cf45415d3e96b7b9c05c6b0431433b6cd96383fad26d004c149e685fdd6c730eee1b7b6f72aca4b4d726f4523a6a35e626bbb5aff581310f910737942b6b2ca0

  • SSDEEP

    384:pmgBjpV2XBHgZWU10DmiMQDqUhAlgOKISFv5w+RlCRF5KpfnjQtFV:pmgBNMBHKWU10DmjQDZWl1Ou+RlCsncV

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.172.31.178:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NVSJ5U

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      73c5b71d2923b11a8b262321c6229520c93115f82c78d742f041a650725d482f.rtf

    • Size

      63KB

    • MD5

      b5b2948d407676eab86b1152e7ce5ec4

    • SHA1

      85de7e562d97c36b9318393fd6185df6b1ba55b9

    • SHA256

      73c5b71d2923b11a8b262321c6229520c93115f82c78d742f041a650725d482f

    • SHA512

      b2048e775bccc0f0cc144fcfaa4e3067fa4ed2613f1e152323673c6497a82815d2ef366d29289214cf5f0007a3c8537af6f40b6ab07a1a936ed4f4612be9725a

    • SSDEEP

      1536:fgoIW1uYod+RuUl9Zh7teyDdvqMhRSiupwk8uXjlh17AY9j:otyuYod+RuAZh84vSiowk8uXjlh17AYR

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Blocklisted process makes network request

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks