General

  • Target

    25052024_1051_23052024_OSE - PO & FCST - 採購單-LT24052303183991-01.rar

  • Size

    1.0MB

  • Sample

    240525-mxybvadh9z

  • MD5

    cb0ee046db848416fd6fa70bbbc5ea8a

  • SHA1

    1725f98f7f9e53c091a11a4d9cebbda02053ebc7

  • SHA256

    f67ae1eff47c8f1efc0044db3bc5a435a7f419e70c2361eb40d6714a4c37742a

  • SHA512

    5d62f52cb64905776d3056bb39e8b50606de13ca3b3d49f45266894f0bd6cd0b2ba7448da2a922306f045afbd8ba58f0ebb0220499ffff1dc9c9df55c03d728f

  • SSDEEP

    24576:QR/xqwPI4ANhE833sU+8E2OX3uO2Jdv7+a/AGpPlVSD21Dw+rGUAV:Q7quIHE8nsUPE2uN2r++DlV+2SOI

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

b64c611.ddnss.eu:3154

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    uytrs.exe

  • copy_folder

    iu7y6tr

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • keylog_crypt

    true

  • keylog_file

    u8tus.dat

  • keylog_flag

    false

  • keylog_folder

    87y6trf

  • mouse_option

    false

  • mutex

    OIUGH6-BFBAXD

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot7062583539:AAFQjFwRQkLApxa503ZXmcd2CJhJK5Vjupw/

Targets

    • Target

      OSE - PO & FCST - 採購單-LT24052303183991-01.exe

    • Size

      15.0MB

    • MD5

      4cbc670c79dddc759b63ded7f36a80e1

    • SHA1

      7bf50c94959846e1c7caf521e697ee2367aabf01

    • SHA256

      1dd45a1200496700a9a9e138a0ecf1625c981855159ceb8624fe69b8bcfe3bb5

    • SHA512

      6bc15e6acbfdcf09e5eefc1fcc02e997ae81c2b9bcbf02df78ba6c3db8c8620130880fa2d6e49a1b3a9e7df2b4f5e428d8cb4326e6679d9e0639dc40ce099535

    • SSDEEP

      24576:y6nVMk+HIj90cmvFMN8O6TXQRfAGWEUAxqnRAIsJumwocd5xShmC+a+OPj:xVz7tWqKTXQiTpsJr/Qx8ec

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Remcos

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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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.

    • Adds Run key to start application

    • 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