General

  • Target

    1.exe

  • Size

    2.8MB

  • Sample

    220524-v39k3abea3

  • MD5

    d9a19a5c8df54973e2336bbfd95cbe5b

  • SHA1

    f7983f98f6a6e769c97027dc65ff5e9d6e009488

  • SHA256

    eb1d3b24830e9b7370fbe2c0128d43f6ba9272b8990f73446e9137b299a369bd

  • SHA512

    165149dbf48e04e362373c78d29caa42df3114fbc4181fb2f5b22f1df20f41b574e31a44088238723d3e983f51903a0e030f706cce8d05efb56d317c0bb06fd1

Malware Config

Extracted

Family

remcos

Botnet

RH1

C2

185.29.9.125:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    itunes.exe

  • copy_folder

    RMS

  • delete_file

    true

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Jd1985-XODZWD

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Rms

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Targets

    • Target

      1.exe

    • Size

      2.8MB

    • MD5

      d9a19a5c8df54973e2336bbfd95cbe5b

    • SHA1

      f7983f98f6a6e769c97027dc65ff5e9d6e009488

    • SHA256

      eb1d3b24830e9b7370fbe2c0128d43f6ba9272b8990f73446e9137b299a369bd

    • SHA512

      165149dbf48e04e362373c78d29caa42df3114fbc4181fb2f5b22f1df20f41b574e31a44088238723d3e983f51903a0e030f706cce8d05efb56d317c0bb06fd1

    • Remcos

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

    • UAC bypass

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Executes dropped EXE

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

3
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks