Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220718-en
  • resource tags

    arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
  • submitted
    05-08-2022 09:27

General

  • Target

    4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe

  • Size

    986KB

  • MD5

    e3e2371b9c9faa09afe127d0f0e12f3b

  • SHA1

    dfddf15a3f3f77cb5c4798eff4e3c529ad049db8

  • SHA256

    4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e

  • SHA512

    1ea05e84d5cdeff9e5e9f4d1b829d8e11c30ae38a2a36c6c661239e93b6ce5e4610fce148cf0aadf6926136087e00d9dcbfcd1677717eb6905d8bebf3e6079d3

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.

  • 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.

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe
    "C:\Users\Admin\AppData\Local\Temp\4cd864cf3d39baff963a023423237dd164ce0e5de001d1397031b74c3b26691e.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1912
    • C:\Windows\SysWOW64\SndVol.exe
      "C:\Windows\System32\SndVol.exe"
      2⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1048

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1048-66-0x0000000000000000-mapping.dmp
  • memory/1048-68-0x0000000050600000-0x0000000050685000-memory.dmp
    Filesize

    532KB

  • memory/1048-70-0x0000000050600000-0x0000000050685000-memory.dmp
    Filesize

    532KB

  • memory/1048-71-0x0000000003450000-0x00000000034CE000-memory.dmp
    Filesize

    504KB

  • memory/1048-72-0x0000000003450000-0x00000000034CE000-memory.dmp
    Filesize

    504KB

  • memory/1912-54-0x0000000076071000-0x0000000076073000-memory.dmp
    Filesize

    8KB