Overview

overview

10

Static

static

Request fo...20.exe

windows7_x64

10

Request fo...20.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    602a23db79b166b648550c4c45246a3f2664d3bc4b1cc771bd51e6ee1df125f6

  • Size

    193KB

  • Sample

    220521-n7rsgsegd7

  • MD5

    524e771510d93f2e6f425892dd181d34

  • SHA1

    2f93a5cbe955168d6158a64d7397fb429d2a7b15

  • SHA256

    602a23db79b166b648550c4c45246a3f2664d3bc4b1cc771bd51e6ee1df125f6

  • SHA512

    2faff7216d222524b0ec9133f711417747d72d3e8034646b3e2bf6f7d9bfbc29b274a5efdec6738af0eded1141e782e9a34b7f83fde33aae2afacb32908a8d85

Score
10/10
remcosremotehostcoreentityratrezer0

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

RemoteHost

C2

dolxxrem.hopto.org:3086

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • 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

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-B3XNCF

  • 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

  • take_screenshot_title

    wikipedia;solitaire;

Targets

    • Target

      Request for Quotation Export-DH772_24042020.exe

    • Size

      288KB

    • MD5

      6188c89247429b47bf080fba75b26c5d

    • SHA1

      cd1d1c1de2f841e41324667d069d228c538fe1cb

    • SHA256

      cc7c88bb23e3dc2b7de49f259704692ff36fb9dd7b3c307710034229b263e0fc

    • SHA512

      9290f0546b9942c5af81804e1f302cd7e696403ad2a3a32ef24c6dc1b649b55fae78e5581b283a0a59bbc7388dbf635387fd63f4f590893f16e4cc8099e716c8

    Score
    10/10
    remcosremotehostcoreentityratrezer0

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

      coreentity

    • Remcos

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

      ratremcos

    • ReZer0 packer

      Detects ReZer0, a packer with multiple versions used in various campaigns.

      rezer0

    • Checks computer location settings

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

    • Uses the VBS compiler for execution

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1
T1064

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Scripting

1
T1064

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks