Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220722-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-08-2022 19:37

General

  • Target

    c1fb3c03cd371463107058c6c2b3a23b234578fd7df330d85efce4c85bcee570.exe

  • Size

    1.0MB

  • MD5

    a2a39d65f598684ac9bdb3a88d85d670

  • SHA1

    81ae837a631e65953b246b75959873e16c91204b

  • SHA256

    c1fb3c03cd371463107058c6c2b3a23b234578fd7df330d85efce4c85bcee570

  • SHA512

    848f6ff70d0d95febd4118dc3a499563274be860b3ca2e210d5d6db16a9be3c7fad9e8a0b65f52634827f1799f024958e4ad55c184ed5f062808c0d59f3bac3f

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

www.varshtrade.com: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

    notepad

  • mouse_option

    false

  • mutex

    notepad-TFQMB3

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c1fb3c03cd371463107058c6c2b3a23b234578fd7df330d85efce4c85bcee570.exe
    "C:\Users\Admin\AppData\Local\Temp\c1fb3c03cd371463107058c6c2b3a23b234578fd7df330d85efce4c85bcee570.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4060
    • C:\Windows\SysWOW64\printui.exe
      "C:\Windows\System32\printui.exe"
      2⤵
        PID:380

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/380-160-0x0000000000000000-mapping.dmp
    • memory/380-161-0x0000000050590000-0x000000005061C000-memory.dmp
      Filesize

      560KB

    • memory/380-162-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/380-163-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB